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jakepugh514 · Jul 25, 2013, 08:08 PM

I have a 1994 Chevrolet 3500 series truck chassis with a bucket truck assembly attached. The brake lights and emergency flasher circuits don-t work. I need wiring diagrams and schematic diagrams for both circuits. Thanks!!

CaptainRich · Jul 26, 2013, 01:17 PM

That's a large, very complex schematic. Too large for here.
Do the Turn Signals work? If they do, try jiggling the Hazard Switch several times.

With the symptoms you've described, I'd concentrate on the Turn Signal Switch. Make certain you have power going to the Switch (on the Brown wire) with the Hazard Switch in the ON position.
Turn on the Hazards and check for power coming out of the Turn Signal Switch at the Light Blue, Dark Blue, Dark Green and Yellow wires (those feed to the exterior lamps).
Good luck and let us know.

jakepugh514 · Jul 26, 2013, 01:53 PM

Originally Posted by CaptainRich

That's a large, very complex schematic. Too large for here.
Do the Turn Signals work? If they do, try jiggling the Hazard Switch several times.

With the symptoms you've described, I'd concentrate on the Turn Signal Switch. Make certain you have power going to the Switch (on the Brown wire) with the Hazard Switch in the ON position.
Turn on the Hazards and check for power coming out of the Turn Signal Switch at the Light Blue, Dark Blue, Dark Green and Yellow wires (those feed to the exterior lamps).
Good luck and let us know.

Thanks Captain Rich, I'll take down this info and give it a try. Yes, both turn signals work, front and rear.

jakepugh514 · Jul 26, 2013, 01:55 PM

Thanks Captain Rich, I'll take down this info and give it a try. Yes, both turn signals work, front and rear.

jakepugh514 · Jul 26, 2013, 02:00 PM

Thanks Captain Rich, I'll take down this info and give it a try. Yes, both turn signals work, front and rear.

jakepugh514 · Aug 3, 2013, 05:31 PM

Originally Posted by CaptainRich

That's a large, very complex schematic. Too large for here.
Do the Turn Signals work? If they do, try jiggling the Hazard Switch several times.

With the symptoms you've described, I'd concentrate on the Turn Signal Switch. Make certain you have power going to the Switch (on the Brown wire) with the Hazard Switch in the ON position.
Turn on the Hazards and check for power coming out of the Turn Signal Switch at the Light Blue, Dark Blue, Dark Green and Yellow wires (those feed to the exterior lamps).
Good luck and let us know.

Captain Rich, After getting someone with some eyes(I'm legally blind), we finally got it fixed. Turns out the "brake" fuse, not the "stop" fuse was bad.It took awhile but we finally stumbled on to it. Thanks for pointing us in the right direction.
Jake pugh