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No rear turn signals

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    MAKE:GMC
    MODEL:Savana
    YEAR:2007
    MILES:107659
    ENGINE:6 L
    DESCRIBE ISSUE....The turn signal lights only work in the front.Also there are no brake lights. The fuse box under the drivers seat contains fuses for the rear turn signals They Have no juice. The running lights are on all the way around. Is there a module in this system? I would like some advice. Thank You
     
  2. Turn Signal/Hazard Lamps

    The IGN E 10 A fuse in the underhood fuse block supplies battery positive voltage to the turn signal switch assembly. Ground for the hazard switch is from G302. The FLASHER 15 A fuse in the underhood fuse block supplies battery positive voltage to the turn/hazard flasher module. When the turn signal switch is placed in either the left or right position, a voltage signal is completed from the turn signal switch to the turn/hazard flasher module. When the hazard flasher switch is activated, a ground signal is completed from the hazard switch to the turn/hazard flasher module. The turn/hazard flasher module then sends an on-off voltage signal to the appropriate turn signal lamps, or to all turn signal lamps for hazard operation through these fuses:

    • DR TRN MIR, in the body fuse block
    • PASS TRN MIR, in the body fuse block
    • LR STOP/TRN, in the body fuse block, and in the underhood fuse block for RPO UY7
    • RR STOP/TRN, in the body fuse block, and in the underhood fuse block for RPO UY7
    • LR TURN in the underhood fuse block
    • RR TURN in the underhood fuse block
    • LT DRL/TRN in the underhood fuse block
    • RT DRL/TRN in the underhood fuse block
    The audio chime is also activated when the turn signals are on. When the hazard switch is pressed, all turn signal lamps will flash including both instrument panel cluster (IPC) turn indicators. The front turn signals are grounded at G100 and G101. The rear turn signals are grounded at G401 and 402. The mirror turn signals are grounded through a splice pack at G347.
    Turn Signal/Hazard Flasher Module is...

    Below the IPC, behind the left knee bolster

    Other info says...Center of the I/P....which is #3 on drawing.[​IMG]
     
  3. Does it have a trailer harness? I've traced more than a few odd, rear lamp only issues back to scotch locks and butt splices in trailer harnesses.
     
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  5. Thank you all