Right front turn signal not working

Tiny
TIM BRAGG
  • MEMBER
  • 2008 CHEVROLET EXPRESS
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 31,000 MILES
Hello, the right front turn signal does not work. The right rear signal flashes quickly. There is no power going from engine compartment fuse panel to the blue wire with the white stripe that operates that signal. I can find no fuses blown in the engine compartment or the drivers's seat compartment. I do not have the schematics necessary for me to check the BCM. I cannot find the fuses that operate the turn signals. Suggestions?
Tuesday, May 14th, 2019 AT 2:47 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,097 POSTS
Welcome to 2CarPros.

First, I attached pictures from the schematic. I highlighted the power supply from the BCM to the light. If you have power at the BCM (see picture 1) either there is a break in the wire or if there are folding mirrors on the vehicle, there is a splice under the dash in the wiring harness that may be bad. I put the pictures in order and overlapped them so you can follow the schematic.

Take a look through these pictures. The blue and white wire you referred is highlighted in yellow. Also, I circled the splice I am referring to.

Let me know if this helps or if you have other questions.

Take care,
Joe
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Wednesday, May 15th, 2019 AT 7:33 PM
Tiny
TIM BRAGG
  • MEMBER
  • 2 POSTS
Hi Joe, thank you for the schematics. I found the issue within minutes of taking a look at them. The issue was in the power supply to the BCM. There is more than one fuse in the engine compartment fuse panel that supplies BCM with power, and BCM fuse 3 was blown, and it controls only the right front turn signal. Once I had the schematics it was easy to trace. Thank you again for your help. Tim
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Thursday, May 16th, 2019 AT 10:15 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,097 POSTS
Not a problem, Tim. You know, things are getting more and more involved. Simple things have become difficult. This is a good example. I think techs of the future will need to have both mechanical and electrical engineering degrees. LOL

You take care and let us know if you need anything.

Joe
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Thursday, May 16th, 2019 AT 6:15 PM

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