Electrical system problems
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Electrical issues
Volkswagen Jetta 2010 2.5 s 177243 miles
My sunroof it has been leaking since I got it I've had it for 2 years and I've tried to seal it with everything I can cuz I can't fix it or repair it right And it's been raining like no other lately and I've been having little issues I think my electrical system is messed up All my lights just sort of turning on all my morning lights and my speedometer does not work and it was just all the sudden can someone help
1 report
LE
I threw a rubber door mat over the sunroof moonroof whatever I like 2006 GLI Jetta just up to water from coming inafter the weather clears up have to clean out the drainage spots under the hood possibly in the back of necessary
Vote helpful
CommentElectrical issues
Volkswagen Jetta 2009 Sedaan 18 miles
Radiator fan is working after removing key from ignition
3 reports
Engine runs but won't start 
Solved
Volkswagen Jetta 2001 143 miles
Hope someone can help me. I own an automatic Jetta 2001 and it was working properly until suddenly, one day, it wouldn't start again. The engine runs but there is no way it can be started. The fuel pump's pressure has been checked, the coil replaced as there were no sparks in the spark plugs, but the problem is still there. All fuses are alright as well as the crankshaft's sensor. The acceleration body has been cleaned and the battery replaced. Can the stereo have something to do? Because it is indicating SAFE 0000, meaning that the car is blocked? Can someone please tell me what to do?
12 reports
After many attempts at trying to solve the same problem you are now having with my Jetta 2001, one day I found out that the temperature's sensor, through which the cooling liquid runs, had oil in its exterior. It was dirty due to a previous tuning, so I removed the connector to clean it and the failure disappeared. I really don't know how this can affect the starting, but I cleaned certainly deeply that connector, which has 4 pins, and the vehicle started as if nothing had happened. I then bought the sensor and the problem was finally solved.
Best answer (according to car)
Thank you, siller for reading and sharing your experience. After trying different things, I myself removed the crankshaft's sensor, took it to a good electrician and he said it was not working properly. I then bought a new one, installed it and it finally started.
I have a 15 jetta se 1.8 turbo I turn it off to pump gas an it never turn on yes the battery good it never done this before
Hope someone can help me. To the problame
Transmission in emergency mode vw Jetta 2019
Transmission in emergency mode vw Jetta 2019
CommentMany failures Solved
Volkswagen Jetta 1999 135000 miles
The first failure in my car appeared from one day to the other. It was working perfectly one night, but the following morning it wouldn't start. There was some engine work but I could not start driving it. It seemed as though there was a fuel deficit, but it had been refuelled the day before. I checked the fuel pump, and surprisingly found out there was no sparking, so I logically thought the problem was with the coil. I changed it but it kept doing the same thing. I then checked relays, fuses and that there was electrical current reaching the coil and everything was ok. The crankshaft's senso… Read complete
2 reports
Best answer (according to josey)
The same happened to me and the problem is in the distributor.
I've changed the distributor and it seems as though the problem has been solved. At least for the past two days it has been working perfectly. Thank you very much!
CommentNo crank ,no start Solved
Volkswagen Jetta 2010 1.6 tdi 121000 miles
Went out to start the car and no crank and no start ,no lights on the dash or nothing ,had a look at the relays your ridden the starter relay and sprayed easy start in the air box and it started straight away so now not sure if electrical problem or it’s immobiliser any help is a massive help
1 report
So up to now,have changed the gateway module just noticed that their is no glow plug light at all on the dash and today put new battery in it,am beginning to think the ecu isn’t getting power of someone could help would be appreciated
Best answer (according to John)
ANDRE VIEIRA from other 10 months ago
I believe it is the comfort module, it is located below the driver's panel. I am having the same problem and need to replace it.
Ok my 2010 jetty started with the driver side back brake light being on bright. Changed everything in the light assembly. We'll my battery gets drained if I do t unplug it. When I start my car nothing works. O electrical like radio windows, turn signals, brake lights nothing but my parking lights work. I need some help here bad. I tore my motor apart like 3 times, the inside of my car is taken apart. Ne ideas or if ne one has had the same problem n got it fixed can u explain this for me. Ne help will be appreciated very much. Its been like a year now. .
Turns out was a bad ecu had it opened up no sign of damage but was white crystals on the metal cover so water damage had the ecu changed and replaced with second hand one first turn of the key it started now misfires with a leaking injectors seal cylinder 2 the joys
When a had a look at the car a think the problem is the ecu in the uk spec sits underneath the windscreen wil the plastic panel on top that the wipers attach to and mines had a crack directly above the ecu area so just over time water must have got in what about your car is your ecu in the same place USA spec ?
CommentCranking but won't start Solved
Volkswagen Jetta 2002 102000 miles
I can start it by spraying starting fluid into the air intake.
I have replaced the Fuel pump, fuel injectors, Fuel Relay 409 (under the steering wheel), the ECM, and crankshaft sensor. Crank position sensor. I am now lost why this vehicle won't start.
I have replaced the Fuel pump, fuel injectors, Fuel Relay 409 (under the steering wheel), the ECM, and crankshaft sensor. Crank position sensor. I am now lost why this vehicle won't start.
1 report
Best answer (according to Angel)
The fuse box imagines on this website helped alot. Once I installed all the the parts. I noticed that the fuses on the side of the drivers panel were missing some so I checked this websites fuse diagram and noticed I didn't have one for the Fuel injectors. Once I added it car started right up.
CommentTail lights
Volkswagen Jetta 2014 Sedan 4cylinder 139653 miles
Changed bulbs but still out. Now trying to see if it’s the fuse but don’t know which fuse I should change out.
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12 reports
Did u get this figured out? My jetta has no tail lights or dash lights. All my other lights work tho.
CommentStalls when driving, EPC and oil indicators
Volkswagen Jetta 2002 168000 miles
I have a Jetta A 4 2002 and, when driving, it suddenly jerks, EPC and oil indicators turn on and it loses power until it stalls. I try to speed it up but it won't answer properly. Only after 20-30 minutes the engine will start again. The car has been tuned, the battery, oil pump and air sensor changed but it keeps doing the same thing. Can anyone help me? It really worries me when I'm driving and it suddenly stalls.
5 reports
Check the electronic acceleration body, that is what the indicators mean.
Thank you patience, I will tell this to the mechanic.
CommentI would like diagram for fuses and relays
Volkswagen Jetta 2006 Jetta 2.5 20000 miles
I would like diagram for fuses and relays
5 reports
Spoiled057 from United States 2 years ago
Me too please!!! Can't seem to find that anywhere
CommentNo power in the lighter
Volkswagen Jetta 2008 clasic tdi 19 standard 100000 miles
There is no power in the lighter... problems in the fuse box
2 reports
You answered your own question... problems in the fuse box
Check your interior fuse box F30 which is cigarette lighter (20A)
CommentLow beams in-op
Volkswagen Jetta 2013 Jetta 2.5 121000 miles
High beams work fine. Have checked all fuses and all are good. Help?
7 reports
same my low beams work just are very very dim and basically aren't even on at night
My low bean lights are not working. I think this is affecting the fog lights too, as they be on 1 by 1 changing from time to time. And now I have a problem with my right day time drive light. What can be the problem?
CommentRelay Diagram?
Volkswagen Jetta 2001 Wagon,manuel,mk4, gli 200000 miles
Can I get a diagram of the relays?
1 report
Comment1 reply
CommentThe wipers will not turn on
Volkswagen Jetta 2008 Jetta 2.5L 160000 miles
The fuse and motor work for wipers I don't know if it uses a relay but I have no idea where the relay would go or what number it would be
2 reports
CommentAndroid touch screen radio with backup camera not working properly.
Volkswagen Jetta 2008 Sedan, 2.0T BPY, dsg, Wolfsburg edition 165000 miles
Replaced the factory multiple disc unit that died with an aftermarket android CarPlay unit. Wired it into the taillights along with another one for a dash cam (it’s working perfectly). Everything except the backup camera works fine.
The trunk doesn’t work now either.
There’s no real instruction manual whatsoever. China. Came with a wiring harness and cambus decoder that plugs right in.
Got any ideas on this?
The trunk doesn’t work now either.
There’s no real instruction manual whatsoever. China. Came with a wiring harness and cambus decoder that plugs right in.
Got any ideas on this?
2 replies
The camera works perfectly with the power on and the engine off. Switching into reverse mode and shows a good image from the backup camera.
However, with the engine running it doesn’t work. It briefly shows a multiple image, then goes black, and gives a no signal message.
However, with the engine running it doesn’t work. It briefly shows a multiple image, then goes black, and gives a no signal message.
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Update:
I’ve seen a gadget on AliExpress that claims to fix this problem. A transducer or something. The device filters out the hidden data transmitted in the wiring somehow. Apparently, this computer data is only present when the engine is running.
It looks like a typical canbus adapter for led headlights that wires in like a ballast resistor.
Could it be that simple?
Why is this not common knowledge if so?
I’m going to try it. Costs less than $5.
I’ve seen a gadget on AliExpress that claims to fix this problem. A transducer or something. The device filters out the hidden data transmitted in the wiring somehow. Apparently, this computer data is only present when the engine is running.
It looks like a typical canbus adapter for led headlights that wires in like a ballast resistor.
Could it be that simple?
Why is this not common knowledge if so?
I’m going to try it. Costs less than $5.
Comment2012 Jetta just died while driving on freeway no hazards @445 am
Volkswagen Jetta 2012 Sedan 118227 miles
Just replaced the battery and now car died while on freeway just dead.
1 report
you need to do the coding for the new battery because the car still sees the old one and uses power according to the last battery and how much juice it still had. It's a thing.....
CommentThe horn fuse
Volkswagen Jetta 2006 2.5 litre 86852 miles
The fuse to the horn is missing which slot is it
16 reports
2015 jetta tdi and my horn has stopped working too. Which fuse is it?
CommentHeated seat
Volkswagen Jetta 2012 2.5 se 185000 miles
My heated seat stopped working I think it’s a fuse but idk which it one so would like a copy of a fuse box diagram or any other opinions
7 reports
Same here I checked all fuses but still not working:(
CommentComputer thinking sound
Volkswagen Jetta 2015 automatic 115000 miles
My car makes a click-click sound when accelerating around 12mph, and when stopping around 8mph (stopping with brakes or by just letting car coast to a stop on its own. The sound seems to be coming from under the dashboard, towards the odb plug.
My car has been making this sound for some time, but it seems to be more often after replacing my battery after it died.
My car has been making this sound for some time, but it seems to be more often after replacing my battery after it died.
4 reports
CommentSos message
Volkswagen Jetta 2020 Sudan 21400 miles
The sos help button in the car will not go out i think it's a electrical problem because it will sometimes go out but come right back on
2 reports
Radiator fan is working after removing key from ignition
CommentCompletely dies at stops and then hours later will start up again,
Volkswagen Jetta 2022 Jetta GLI 5000 miles
We bought new. After 7 months of ownership, car completely died at stop light. Was able to restart. Happens intermittently. Twice have returned to parked car and completely dead. Now this weekend this happened, started back up after 24 hours just to die again. After 3 minutes it started again. We have taken it to the dealership and they replaced the battery and the control unit after the first 3 times but obviously this didn’t fix it.
1 report
There are a few potential causes for this problem, including a faulty alternator, a failing battery, a malfunctioning starter motor, or a problem with the electrical connections in the vehicle. A qualified technician would be able to diagnose the issue and provide a solution.
Start and stop during cold weather especially morning time , what can be the problem?
CommentCar not starting
Volkswagen Jetta 2007 2.5 Wolfsburg edition 189000 miles
The car has been sitting for 8 months bought it for a very good price. I have good fuel pressure 35 , I have fire to all the coils ,plugs look fine, all fuses look good, but nothing just turns over seems like no fire or fuel. What should I do next? Also it had a po721 service code which I knew about I need to replace the output shaft speed sensor. No other codes
3 reports
Oskarthegoat from United States a year ago
I have a similar issue. Fuel pumps not getting power, same car tho. Has a mystery electrical problem.
CommentHorn not working
Volkswagen Jetta 2014 Automatic, 4 door Jetta 131000 miles
I have googled it and pulled up that when you hit the horn, you can hear the clicking noise. I can hear it underneath the fuels box area under the steering wheel, but I went and purchased a relay and I don’t know if I put it in the wrong place or what I also checked the fuses And still not working
8 reports
Comes and goes. Taking it to the dealer now to see if I can have second set of eyes. Will keep UTD
CommentIs there a fuse for the daytime running lights?
Volkswagen Jetta 2019 Jetta 100000 miles
Is there a fuse for the daytime running lights so I can turn the lights off all the way
3 reports
Yeah if you slightly activate the hand brake it will shut off the day headlights
CommentStarter motors
Volkswagen Jetta 2009 Manual 60000 miles
Ok, it is our daughters VW Jetta 2009 77TDI. She first took it to a vw service centre (Australia) had a power loss and a clinking noise (not engaging) but does start. They put it on their system and came up with zero, then they update the computer and re did and it said, injectors. But zero for the starting. She brought injector cleaner and that fixed it, but still the same on starting. She had already replaced the battery (which turns out is the wrong battery 500 cca) She decided to sell the car, but a mechanic told her she need a new starter motor (this was during the road worthy inspection)… Read complete
2 replies
glendagardiner from Australia 9 years ago
We got a call back from VW, their response was they couldn't comment as non genuine part was used. We did get in contact with a German car specialist and he said, if the larger starter motor has been in now for a few months he can not see any issues with the electronics as it would of happened by now. Also he advised in getting a new key as it can cause start up noise...
CommentRadio not working
Volkswagen Jetta 2016 sadan 122396 miles
My radio and outlets have not working since i bought the car. The fuse to the 12v outlets is blown. I replaced it hoping it would fix the issue but it did not. There is no fuse where the diagram shows the radio fuse should be. When i try to put a different fuse in the same spot it is extremely loose and still does not work.
2 replies
Replace the fuse in slot 30 with a 20A and the fuse in slot 57 with a 20A hope this helps. If this doesn’t work, buy new fuses chances are the ones you bought are just poor quality
There is nothing in slot 57 and it does not seem to connect to anything. But the radio has turned on randomly for a few minutes here and there in the past.
CommentIntermittent left headlight
Volkswagen Jetta 2019 R-Line, 1.4L turbo 82750 miles
I have an issue with my left front headlight where the headlight turns on then turns off one second later. The code I have using my Carly scanner is B149C01. This was a gradual decrease in ops capability. It was working as expected then slowly started going in and out. Now it just stays off unless I power cycle the headlamp switch. BTW, I just replaced the headlight switch. I have checked associated fuses and found no issue. Any ideas or assistance is greatly appreciated.
3 reports
Some folks have suggested headlight replacement, but that is a $700 guess.
CommentStart Button Issue
Volkswagen Jetta 2012 Jetta TDI 139000 miles
When you press the start button, the dash lights up, but only for a second not giving you enough time to start the Diesel Engine.
Update: issue still not resolved. I don’t really have a starter problem. When I press the Start/Stop button the dash lights up for a second and goes back dark. I have replaced the button, Starter Relay and the issue remains. I toook my 2012 Jetta TDI to VW Of South Mississippi and they cannot resolve the issue. I am fixing go get the car from the dealership for they cannot fix it.
Update: issue still not resolved. I don’t really have a starter problem. When I press the Start/Stop button the dash lights up for a second and goes back dark. I have replaced the button, Starter Relay and the issue remains. I toook my 2012 Jetta TDI to VW Of South Mississippi and they cannot resolve the issue. I am fixing go get the car from the dealership for they cannot fix it.
1 report
I can start the car, but I may have to press the start button about a dozen times before the dash will stay lit up and I can start the car. The car has never stranded me, but I fear getting stranded is just around the next corner.
CommentKilling my battery
Volkswagen Jetta 2010 2.5 s 146592 miles
I hooked the battery up backwards but sense then i have replaced the battery the altinator twice and the main fuse plate what else could it be
1 report
What i had done was hook the battery up backwards i never even turned it over the lights went crazy the horn started blowing and the alarm went crY with that being said i was told its the altinator changed it twice i was told its the main plate on fuse box under hood so i changed it and two batteries latter every time i hook the battery up it drains it in 5 mins or less
Comment2021 vw jetta 1.4 tfsi No cranking
Volkswagen Jetta 2021 1.4 tsfi 63000 miles
Doesn't crank. All the fuses are good. Battery is good 12.6 volt. No cranking at all. I hooked up the ECU from another jetta, same result. Looks like whether immobilizer issue, or ignition switch, or ground wire.
4 reports
I get a fast clicking (dash lights flash in sync) with no motor turn.
Justyouritguy from South Africa 7 months ago
Have you tried checking the relay? I'm new to ecu's came from an IT and electronic background. Done a bit of mechanical work in my days.
CommentProblems with a Jetta? Share them
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