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Michael_Wild 02-27-2019 09:47 PM

Turn signals not working?
2 Attachment(s)
Hazards works, brake lights work, but no love from my turn signals. Here is what I know:
- the flasher in the fuse box is not getting power.
- the grey wire in the going into the bottom left green connector on the fuse panel is not getting power
- the grey wire leads up to the steering column.
- turn signals were working earlier today, I was doing some work behind the dash and installed a new switch bank to the right of the steering column. Once I buttoned everything back up, turn signals were not working.
- I have checked all the fuses in the fuse panel and they all appear good.

Does anyone know exactly which fuse is for the signal lights?

Any other ideas?



Note: not sure why both pics are upside down, they are right side up on my phone.

hhendrix 02-27-2019 11:18 PM

What is your tow vehicle? I had the same issue in my 2011 F250 and discovered there is a fuse for the trailer turn signals.

bkahler 02-28-2019 05:25 AM

I believe the subject under discussion is a 1984 310 Motorhome, not a trailer tow vehicle.

What you're looking for is the GM chassis wiring diagrams for the 310. If you can't find wiring diagrams I have copies of the chassis diagrams at home that I can post later this evening or tomorrow.


bkahler 02-28-2019 06:38 AM


If you follow this link to the GM chassis wiring diagrams and then go to Nick's post #93 you'll find links to help troubleshoot your fuse block problem.


Michael_Wild 02-28-2019 09:15 AM

Thanks Brad, I will check it out.

Michael_Wild 03-06-2019 12:17 PM

Don't be stupid, stupid
1 Attachment(s)
This problem was total user error on my part. Turns out in the process of testing the fuse box, I removed the turn signal fuse and neglected to replace it. Here is a diagram of the fuse box, a lot of the writing on mine is worn off so I didn't see the "Turn B U" label. Here is a pic I found on the internet in case anyone else has the same problem:
Attachment 335067

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