dash lights and rear lights not working

2012 VOLKSWAGEN JETTA
71,339 MILES • 4 CYL • AUTOMATIC
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TJMAMA96
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where can I tell which fuse is for what.In the fuse box? There is nothing saying what fuse is for the radio, or the tail lights or the instrument cluster.
May 27, 2016 at 8:14 PM
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MHPAUTOS
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Hello,

We need to check fuse #23, 10, 14 and 16 in the fuse panel inside the car and under the hood here is a guid to help you with the fuse locations and the wiring diagrams so you can see how the system works below.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.
May 27, 2016 at 9:47 PM
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J.STIEG
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Having a problem with the tail lights in the rear driverside.
#23 5a fues keeps blowing.
Also the instrument cluster ilumination lights do not come on.
Apr 13, 2020 at 11:13 AM (Merged)
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KHLOW2008
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If the taillight fuse blows, the instrument cluster illumination would not work. There is a shortin somewhere and if you have any impact damagges to fron ot rear of vehicle check the wirings for shorting to body. Disconnect all taillight bulbs and test if fuse still blows.
Apr 13, 2020 at 11:13 AM (Merged)
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J.STIEG
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Ok I disconnected all main connectors front and back to all lights in every corner of the vehicle. Fues #23 still blowes
Apr 13, 2020 at 11:13 AM (Merged)
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CARADIODOC
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A simple trick to finding a short is to replace the blown fuse with a pair of spade terminals, then use small jumper wires to connect them to a 12 volt light bulb. A brake light bulb works well. When the circuit is live and the short is present, the bulb will be full brightness and hot so be sure it's not laying on the carpet or against a plastic door panel. Now you can unplug electrical connectors and move things around to see what makes the short go away. When it does, the bulb will get dim or go out.
Apr 13, 2020 at 11:13 AM (Merged)
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J.STIEG
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Is fues #23 a 5a?
Also need diagrams? Got to get this fixed soon. Thanks
Apr 13, 2020 at 11:13 AM (Merged)
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CARADIODOC
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Hope KHLow2008 can help with that. I've never been able to access the wiring diagram section. We do have links here for Mitchell service manuals. I can also send you to AllData if that will help.
Apr 13, 2020 at 11:13 AM (Merged)
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J.STIEG
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where exactly does #23 go. How many things does #23 power. Need to see some wire routing.
Apr 13, 2020 at 11:13 AM (Merged)
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CARADIODOC
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This link will take you to Mitchell Manuals:

https://www.2carpros.com/articles/mitchell1eautorepair-car-repair-manuals

This one will take you to my web site with an ad on top for AllData:

http://randysrepairshop.net/index.html

I have a lot of stuff for troubleshooting electrical problems but nothing specific to your car. Mitchell is less expensive and they have always had really good wiring diagrams. I wish I could get into those sites to get a diagram for you. Hopefully KHLow2008 will be able to when he sees your reply.
Apr 13, 2020 at 11:13 AM (Merged)
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EXOVCDS
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Are you sure the problem is in the back?

Did you check the front left side marker in the bumper?

How's the amber bulb in the front headlight assembly?

Thomas
Apr 13, 2020 at 11:13 AM (Merged)
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EXOVCDS
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Attached image:

- #92 goes to front left side marker
- #115 goes to left tail light
- #98 goes to left park light (front)

Thomas
Apr 13, 2020 at 11:13 AM (Merged)
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EXOVCDS
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Forgot image... sorry.

Still getting used to new website layout...

Thomas
Apr 13, 2020 at 11:13 AM (Merged)
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J.STIEG
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Thomas,
can you post that diagram again, only without the red arrows. Thanks
Apr 13, 2020 at 11:13 AM (Merged)
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J.STIEG
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Never mind, I think they are all GR/SW. thanks
Once again every thing is unplugged FRONT and BACK Side to side and fues #23 is still blowing.

I will try disconnecting power to cluster to.
Apr 13, 2020 at 11:13 AM (Merged)
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CARADIODOC
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Put the light bulb in there. Why keep on buying fuses? Instead of doing a bunch of stuff, then installing and blowing another fuse, just see what makes the bulb go out. WAY more efficient and less costly.
Apr 13, 2020 at 11:13 AM (Merged)
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J.STIEG
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The #23 fues ONLY blows when the HEADLIGHT SWITCH is on, but with all lights unplugged in every corner.

I have the test light bulb looped in series on #23, and all lights UNPLUGGED. I now turn the headlight switch on, but TEST LIGHT comes on.

Right now I am trying to get the test light off,,,,, with headlight switch on,,,,,, and of course every light unplugged.

Trying to find a place to unplugg at firewall to see if problem is in the front or back, Any ideas?
Apr 13, 2020 at 11:13 AM (Merged)
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J.STIEG
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There are 10 wires going to the headlight switch. I need to know what they are, and test them for shorts.

If I unplug headlight switch connector the test light on fues #23 goes out.
Apr 13, 2020 at 11:13 AM (Merged)
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KHLOW2008
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See if this diagram is of any help.
Apr 13, 2020 at 11:13 AM (Merged)
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J.STIEG
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thanks KHLow2008 for the diagrams! I found the problem using the diagrams.
It was a left front small amber running light shorted out.
Apr 13, 2020 at 11:13 AM (Merged)
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KHLOW2008
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Glad to know you have fixed the problem.

Apr 13, 2020 at 11:13 AM (Merged)
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SLIMBO_JIMBO
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My left tail light went out the other day, so I went to advanced auto parts and purchased a replacement. The replacement light bulb was installed successfully, but once i turned the lights on - it still was not working. The brake lights work fine, just not the left tail light. I am not sure if this is a fuse issue or some type of socket or wiring issue. Ive tried to find fuse diagrams online to see if I could find the fuse for the tail lights to check to see if this was a fuse issue - but there is no information out there. Does anyone know if this is a fuse issue or if this is a different problem Thanks.
Apr 13, 2020 at 11:13 AM (Merged)
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JACOBANDNICKOLAS
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Hello,

It could be a fuse or the bulb connection, here is the wiring diagrams so you can see how the system works with a guide to help test the bulb for power to see if it is a socket problem and a guide to help check the fuses, the fuse locations are in the diagrams below.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/no-tail-lights-exterior-running-lights-tail-lights-out

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.
Apr 13, 2020 at 11:13 AM (Merged)
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SLIMBO_JIMBO
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Thanks for the guides and fuse diagrams, I checked the fuses they were okay I found the socket had got wet and corrosion covered one of the terminals, all fixed now what a great site this is :)
Apr 13, 2020 at 11:13 AM (Merged)
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JACOBANDNICKOLAS
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Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.
Apr 13, 2020 at 11:13 AM (Merged)