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2009 Chevy G3500 box truck no r/r turn or brake light; help!

Bulbs are good, turn switch is good, I can activate all turn signals except right rear. Brake light on left side works. Wiring diagram has all lights running through the BCM, how to test this unit? Wiring diagram mentions PCB relays for these circuits, says they're not servicable. PCB relays are under fuse box in engine compartment, presumably attached. Can I r&r the relays or does the harness need to be replaced?

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  • h82typ
    h82typ Dec 03, 2012

    mstramann: This is a BOX TRUCK. Tail light is a Grote 'torsion mount' non servicable unit. R/r running light functions, no voltage to harness at rear of truck.

  • h82typ
    h82typ Dec 03, 2012

    infiremedicoO:disconnected mf switch @ colum, ran hot to t/s lights r/f,l/f,l/r all work. Hazards all work except for right rear.

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psds4
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SOURCE: no turn signals or side brake lights on 94 chevy suburban

the problen is probably the turn signal switch with a test light check for power at brake switch if no power check for power at turn signal switch the brake lights are incorperated through the turn signal switch

Posted on Oct 18, 2008

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SOURCE: Brake light, Turn signal not working rear right 06' Focus

I have a 2000 ford focus no brake lights. with the brake lights the transmission would not go into drive .replaced the brake light switch checked fuse replaced turn signal switch with no results then i moved onto the wiper switch and replaced it as much to my supp rise it fixed the problems

Posted on Aug 06, 2009

AUTODOC01
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SOURCE: brake wiring diagram chevy lumina

why not just replace the turn signal switch must faster and safer . buy one from your local parts house then you can see its not that easy to install but you can do it with a little help

Posted on Aug 26, 2009

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SOURCE: 99 Chevy Tahoe... Rear turn signals, brake lights, and hazards

I had this problem, and to be honest, it happened to the left side about a week later...it's the board that the bulbs plug into...it's a very common problem with this model. So popular that you can normally get the socket board off the shelf at a parts store! it's extremely simple to replace, and I replaced all the bulbs at the same time!

Posted on Oct 11, 2009

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