First, an analog meter has significant input impedance, typically 20k or higher. One headlight was glowing faintly. Is your radio shorting out? I wouldnt. What would cause my van to shake for a few minutes at a time? Any circuit or component is only as good as its ground. If you are not lucky, the high resistance will be in a crimp connection or ugh!! A classic symptom of a weak car battery is a clicking sound coming from the starter Can I just tap the wire from the passenger side low beam to the drivers side? The passenger side show 12.4 volts. It is entirely possible that the battery was faulty causing low voltage at the computer, which in turn can turn on the check-engine light. Power to the headlights is supplied thru the Totally Integrated Power Module. So, I would start by tightening and/or replacing the gas cap. If you were to use an analog meter for the same test, where there is no input impedance, the meter would send the full 9 volts of the internal battery in the meter thru the component, frying the throttle position sensor.. So my question would be what connection that power module has to the second headlight wiring? If you are getting more than 2 volts above base voltage, most likely your alternator is over-charging the battery or the battery is faulty. Maybe you are very lucky, and the high resistance is just in the contacts of the relay that feeds that light. A very high resistance in the wiring combined with a meter with a 1-10 megohm input impedance. And I told them in the beginning the radio kept shorting out. About three months ago I purchased a 2002 Chrysler Town and Country. Another common cause of low voltage is due to prolonged time in a state where the battery isnt being used. Apart from that, if the population increases the demand increases and this leaves an impact on the distribution of voltage. This condition generally occurs from several causes such as: Old battery (worn battery element and liquid) Bad connection to the battery terminal; Alternator undercharge; Discharge battery light is on what could be the problem and I have a 2006 Chrysler Town and Country and out of no where today my van To determine if it is the battery ground, it might be a good idea to check the voltage at another point. When a battery sits for long periods of time (generally a year or more) sulfation occurs which causes the battery to lose its charge internally. What could cause that? Low voltage can also be caused by poor connections to the battery. Also Know, what causes an alternator to put out low voltage? Dont worry; troubleshooting amplifier problems is relatively easy. A faulty voltage regulator, which sends power to the instrument panel in most current vehicles, may be responsible for what causes the instrument cluster to stop working. how do you know if your transmission is It's possible for a loose or damaged gas cap to cause this code. I suspect you may have a high resistance short-to-ground in the line feeding the subject light. I do appreciate your response. Impedance comes into play when reading resistance with a meter. The mechanic pulled out the headlight bulb and saw it was a 12 volt unit. Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. I have a 2003 Town & Country Minivan 3.3L V6 Flex Fuel and whenever I am driving my vehicle it will go forward for a few feet then won't move and when I put it in reverse it will move for a few feet b CarGurus has 4,355 nationwide Town & Country listings starting at $1,490. Visual inspections miss most cases of electrical voltage drop. Intermittent electrical problems those that come and go at random times might be caused by loose or corroded connections. See guide to fix light code P0131. Ground-side voltage drop, a commonly overlooked cause of electrical trouble, can cause most of these symptoms. I swapped the left and right bulb and that didnt solve it. Effects of low voltage. Code P0456 stands for "EVAP System Small Leak Detected". switch the bulbs around and measure again. But the van was in a accident, rear hit. Chase the circuit toward the The OP was clear, I just read the post with my Sunday-morning eyes. It can be caused by the charging system, damaged wiring, or even a bad TCM. Is your ECM giving you problems, call today for assistance. How can I check what is the problem with my vehicle . In some instances, systems other than the alternator can cause low voltage codes. But does that power module change that? And second, the higher the meter impedance, the more accurate the measurement. Impedance comes into play when reading resistance with a meter. no way. Not something to fool with. That 10 megohm impedance is used on the VOLTAGE measurement only. Woah! With the bulb in place it probably gets only a few millivolts. not true. After about two weeks, the service light came on. Old wires and corrosion are two of the common causes of low voltage. started to shake while the ac was on and then did it once without the ac on. The low-tension circuit The low-tension circuit feeds low-voltage current from the battery to the ignition coil, where it is boosted to high voltage for the spark plugs. Only about two miles down the road, the service light came back on. going in your vehicle. I took it to a local mechanic, and the initial diagnosis was bad O2 sensors. Good voltage drops occur with fuel pumps that are given multiple speeds with a module that is connected to a computer with a dedicated signal wire that tells the module to go to a I got 11 volts on the light socket without a bulb in the socket. Haven't had any problems since radio change. I dont think I can trace it to the source. I had a similar problem with the right brake light and turning signal on my 1947 Pontiac. per your comment it doesnt matter where the 9V comes from, but you are saying that in one case (analog) the sensor would fry but using a digital sensor it would not. Try some starting fluid to see if you have ignition. Content will be removed if CarGurus becomes aware that it violates our policies. For some alternators, its normal to see as low as 13 volts. Reading voltage has nothing to do with the impedance of a meter. Once battery voltage drops below a certain threshold, the onboard electronics, ignition and fuel systems may stop working normally or cause the engine to stall. Infinite impedance would have the least error, although 10M is good enough for most cases. Any resistance between the clamp and the post will cause a measurable voltage drop. Pending the answer, I guess I would first swap lights to see if it might be the bulb. Low voltage battery can be used to start the engine, but it's more often failed. There are also cases when car battery voltage can become too high. Poor ground connections are an often-overlooked cause of low charging output and alternator failure.Voltage drops on the positive side of the charging circuit can cause undercharging.Voltage drops on the negative side can cause overcharging. Normally I believe the wiring for the second light would just be pigtailed off the first headlight. The 1955 Ford had a 6 volt system. Then Id start looking at the splices if there are any, the socket itself, and then the wiring between them. You may see it briefly after starting the engine as the alternator has to put the voltage back into the batter that was used to turn over the starter, but that should really not last very long unless the batter was very low. Impedance is nothing but the word used to measure the resistance in non-AC circuits. For example, a Chevrolet Traverse can experience DTC P0562 if the transmission control module has a low voltage condition. Air and fuel delivery problems. My daughters been off in the car all day, so Ive not been able to test anything today, but I can answer some questions. Of concern to me is that totally integrated power module that Tester mentioned. For a car that is 11 years old, overall condition is more important than make. Something jumped up from the trail and literally cut the harness. I just put away my old Honda Accord with almost 300,000 miles on it and picked up a 2006 Pt Cruiser for my daughter to drive at college. That was simple enough. 11 volts should be enough to light the lamp, although it wont glow at full brilliance. 2006 Chrysler Town & Country Touring LWB FWD, 2005 Chrysler Town & Country Limited LWB FWD. One of the possible causes of the P0131 code is an open in the harness that runs to the sensor. Low voltage to the pump can only be from a low voltage at the source or a resistance in the circuit (dropping voltage). And the digital meter will also send the full 9 volts to the sensor, and thats rarely enough to do any damage. Swap the bulbs and see what happens. After a deeper analysis, he refunded me my $, and said he recommended that I get rid of the vehicle immediately. Guess what it was the radio. a flaw in a connector or wire itself. Code P0131: O2 Sensor Signal Low Voltage (Bank 1, Sensor 1). It turned out that the socket ground was bad. If replacing/swapping works, try the old one again to see if the problem was in the socket, rather than in the relays internal contacts. (BTW, I presume you are measuring with the light bulb in place. Now the vehicle will not even start at all. the catalytic converter's may have come apart causing a blockage in the exhaust. clocks and the like will cause the battery state of charge to drop that most people don't think about. 2012 Chrysler town and country minivan with code P0562 sytem voltage low. It can also be caused by poor wiring. Anyone whos ever looked under the hood of a PT Cruiser will understand that its a bit cramped in there. Here are the most common causes of an O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2) problem or code P0137: Malfunctioning O2 sensor; Lean running condition ; A problem with the O2 sensor circuit ; An exhaust leak; Outdated PCM software About three months ago I purchased a 2002 Chrysler Town and Country. The low-tension (LT), or primary-ignition, circuit consists of the battery, ignition switch, contact breaker, and the primary winding of the coil. Eventually checked voltage and its just 11 volts. A low battery also may not have enough reserve power to crank the engine, so the vehicle can be stranded until the charging problem can be diagnosed and repaired. In this case, the car amplifiers usually lose their original sound smoothness and damage the loudspeaker. Faulty Hydraulic Lifter. In some cases, the wires used to carry electricity have a lower gauge than is necessary. If measured at this point, the battery reading you will get will be anywhere between 13.5 to 14.7 volts. P0562 Symptoms Low voltage can cause many strange and different symptoms in Natural calamities affect wiring Perhaps if you ask nicely you can get the parts window guy at the Honda dealer to print these for you for the headlight circuits. Poor or damaged splicing work can also be a cause. 14.3 volts . That said, . The low voltage may be indicative of issues with your alternator. I suspect the 11V reading was with the bulb out. the body people told me there's a low voltage still. The Honda is gone and replaced by a PT Cruiser, Oops! also totally wrong. So, Im looking for a way to rig the headlight. If the meters impedance is infinite it will have zero effect on the voltage it measures. Air and fuel mix together inside the engine, then the These components can also succumb to wear, bad connections, corrosion or damage. If its 11 volts open circuit, then its whole 'nother problem.) I have a 2008 Chrysler Town and country and Common causes are a low charge from the alternator or a poor car battery. If the voltage drop moves with the switch you have a bad bulb. Reading voltage has nothing to do with the impedance of a meter. If your audio system is malfunctioning or the sound cuts off intermittently, then you might be experiencing amplifier problems. Another reason can be dirty connections and weak insulation. After about two weeks, the service light came on. What is the voltage on the A very high resistance in the wiring combined with a meter with a 1-10 megohm input impedance that would blow the fuse. All of this can be caused by the constant heating and cooling that any car goes through in its usual operation. FIXD explains symptoms, causes, and severity of P0131. To get a true voltage reading of the cars battery it is important to measure the voltage after the car has been sat for a period with the engine off, preferably overnight, this provides you with the car battery open circuit voltage or also know as the resting voltage. Remember that big problem with that caravan a year or so ago? And third, any internal battery is not in the circuit when measuring volts with an analog meter. I dont know details of automobile light bulbs, but Id be surprised if you get near-zero light from 11 volts. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. The Honda is gone and replaced by a PT Cruiser ( Chrysler product ) why the Honda was even mentioned just confuses people. huh? Fully charged voltage. While I was replacing third brake light, running light and a low beam headlight I couldnt get the drivers side low beam to light up. The wiring diagram shows you exactly where the wires physically run. Here, we'll look at the effects of low and high voltage on motors and the related performance changes you can expect when you use voltages other than those noted on the nameplate. Can I just tap the wire from the passenger side low beam to the drivers side? I will bet the ground for that light is bad. You need to track that down and repair it. I also remember a 1955 Ford pulling into a filling station where I was hanging out as a teenager. For example, if you were to test the resistance of a throttle position sensor, where the computer sends a reference voltage of 5 volts, using a digital meter that has a 10 mega-ohm impedance input would only send enough voltage thru the sensor to get a reading. Also question is, what should voltage be at idle? 05 town & country the trak off light and abs light coming on the mechanic said it was a low voltage reading what cn cause this. You might want to check the voltage across the battery posts to see if the battery is putting out 12 volts or higher. 2021 CarGurus, Inc., All Rights Reserved. This is the most active group Ive ever posed a question on! If the impedance of the source is high, as was postulated, then the voltage measured depends on the impedance of the meter. When the Car is Running Once the vehicle is running, the alternator will kick in and take over the task of powering the car while also recharging the battery. Lets not condemn the car because its a Chrysler product and not a Honda. We've seen a number of common reasons for heavy duty diesel ECM failure including: corrosion, fuel solenoid shorts, injection wiring harness corrosion, grounding issues, replacement starters, dead battery cells, jumpstarts, and welding and lightning strikes. a low voltage issue would be caused by the alternator not charging or a problem with the battery. That should be easy to figure out if in fact that is the problem. If you get 12.4 volts, the problem is where the light socket is grounded to the chassis or the negative terminal grounds to the chassis. Age and corrosion are a common cause of low voltage, as is dirty connections and poor insulation. If you get 12.4 volts, the problem is where the light socket is grounded to the chassis or the negative terminal grounds to the chassis. I recommend you measure the voltage from the positive side of the headlight socket to the negative post on the battery. Then, clear the code with your code reader, drive the vehicle for a few weeks, and see whether the gas cap fixed the problem. He sighted a low voltage issue. A bad bulb can do magical things. This is a common problem on Chrysler vehicles. Will that work or would that pull too much for either to work? That should be easy to figure out if in fact that is the problem. Powered by Discourse, best viewed with JavaScript enabled. The wiring goes into a bundle about 6" from the socket and under a PT Cruiser hood is crazy crowded. Tot do this I recommend both a wiring diagram and a schematic. I had just installed turning signals and the right side didnt work correctly (that was back when turning signals werent standard equipment). What am I missing? The hydraulic lifters are installed between the camshaft and I have a gearhead friend that put up with his wife and daughters desire to own PT Cruisers because they were cute. Do not expect the PT Cruiser to be as trouble free as the Honda but maybe you are just starting to understand that right now! a low voltage issue would be caused by the alternator not charging or a problem with the battery. No, impedance has EVERYTHING to do with the impedance of the meter. You usually cant see the corrosion inside a connection or the damaged wire that is causing the problem. Does anyone have any idea what could be the problem? My guess is that it probably is a bad ground. 148 Great Deals out of 10,472 listings starting at, 319 Great Deals out of 17,765 listings starting at, 260 Great Deals out of 12,127 listings starting at, 42 Great Deals out of 1,974 listings starting at, 22 Great Deals out of 660 listings starting at, 3,127 Great Deals out of 106,925 listings starting at, 542 Great Deals out of 15,230 listings starting at, 1,101 Great Deals out of 52,811 listings starting at, 7 Great Deals out of 892 listings starting at, 15 Great Deals out of 566 listings starting at, 22 Great Deals out of 572 listings starting at, 22 Great Deals out of 860 listings starting at, 16 Great Deals out of 548 listings starting at, 11 Great Deals out of 382 listings starting at. Try replacing the relay (swap with an identical one if the car happens to have it). 9V is 9V regardless of where it comes from. I have a 2012 Chrysler town and country minivan with Other potential problems are a faulty voltage regulator or a problem in the charging system wiring.. Why is my alternator putting out 16 volts? Even with only 11 volts it seems like there should be some light from the bulb but dim. It got to the point when, putting my accelerator all the way to the floor, the vehicle would not go past 5-10 mph. Both high and low voltages can cause premature motor failure, as will voltage imbalance. Does not make sense to me. I actually meant to indicate in my post that those problems had been ruled out. To determine if it is the battery ground, it might be a good idea to check the voltage at another point. So the problem would have to be either the splice, wiring in between, on the socket. When this is defective, your digital dash may not entirely stop working. I took it to a local mechanic, and the initial diagnosis was bad O2 sensors. Serious problems with both of them caused him to swear off Chrysler products forever. (If this light is fed from a separate fuse, try swapping that fuse to see if it has a soft failure or if its socket contacts are the problem.). With the ignition and fuel system disabled: Asked by joerussell3000 May 01, 2013 at 05:28 PM about the 2002 Chrysler Town & Country eX LWB FWD. High impedance will not blow the fuse. At least youll get to see your daughter regularly 'cause youll be chasing repairs on that PT until it totally fails or you dump it. In closing, I have two things to mention. If its not the relay (or the fuse contacts), you will probably need the wiring diagram to follow 12V from the battery, through the fuse box, up to the lamp socket. A few days later, the vehicle began to stall as I would accelerate. A very high resistance in the wiring combined with a meter with a 1-10 megohm input impedance allowed the meter to read some voltage even though the wiring is essentially open. Ill try to tap/run a new ground tomorrow and see if that helps and not just run a straight wire from the working light. You folks need to switch back to English for morons like me. battery now? What was the voltage with the engine running? I agree with @VOLVO_V70. Clipping is known as a form of wave distortion that mainly occurs when the amplifier is overdriven or tries to achieve the voltage beyond its maximum limit. code P0562 system voltage low. Reading voltage has nothing to do with the impedance of a meter. This is exactly what happened to this 2008 Nissan. I would first look at the socket, then work your way up the expense ladder. The owner said that he had just replaced the headlight. Diagnostic Tree Chart for O2 Voltage Low Code. So I do believe its in the ground circuit. $1,182.00 to change the power module, changed the alternator. If you are lucky, the high resistance will be between contacts in a connector, and you can fix it just by unplugging and re-plugging the connector. If you were to use an analog meter for the same test, where there is no input impedance, the meter would send the full 9 volts of the internal battery in the meter thru the component, frying the throttle position sensor. The only possible places for a resistance are connections (which could be anywhere including a corroded fusebox terminal), relay contacts corroded (but youve already changed that) or internal to the inertial switch. Starter Clicking. I paid for this to find out about mine. Bypass it with a new wire to a convenient spot on the body if thats the case, rather than trying to repair it. sounds like you may have some other issues here. A fully charged car battery voltage should be 12.6v or above, this is with the engine off. If the meter has no impedance it will have a dramatic effect on the measured voltage. It shouldn't be more than a few millivolts. I did have my battery and alternator tested which showed them to be operating okay. P0562 is a diagnostic trouble code (DTC) for "OBD-II System Voltage Low Diagnostic Trouble Code (DTC) P0562". I turned around and took it back to the mechanic, and he examined the vehicle again. Nothing wrong with using alligator clips and a wire to test add a new ground or to run from one headlight to the other to try and isolate which wire if any. If the problem is a flaky connection that gets fixed by unplug and re-plug the relay, fuse, or harness plugs maybe put on a bit of dielectric grease on it. If your ground and power circuit voltage drop tests didn't reveal any unusual resistance, test the starter control circuit. Most generally the reason would be low line voltage coming from the power grid substation. Since translations vary, the possible causes may also differ depending on the make and model of your vehicle. Please refer to CarGurus Terms of Use. Your volt meter may also be giving a low reading. 2010 Chrysler town and country, maybe I should trade it in. Fuel pumps and voltage drops are never a good combination - at least the wrong kind of voltage drops. They were replaced, and I went on my way. can't get past 10 mph and the check engine Over voltage: Yes, an over voltage situation should be indicated by an excessively high rate of charge indicated on the ammeter. Skyfox on Nov 17, 2016 . Usually, components in the control circuit include the ignition switch, safety switch, and relay. The major causes of amplifier problems are improper grounding, clipping or low voltage. I tested socket to battery and got 12 volts on the positive and got some voltage at some combination on the negative, which I read would subtract from the overall and explain the bulb not lighting up. Impedance incudes both DC resistance and reactance. Rather than high resistance short-to-ground in the line feeding the subject light, more likely a high resistance connection in that line. However, your gauges will read extremely high/low, act up, or become erratic.
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