Possible trailer plug/adaptor problem

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OR VietVet

OR VietVet

GMT800 2005 Tahoe Z71
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By the way, the 15 amp blown fuse I found was for the trailer park lights and that was in the under hood fuse box and the 10 amp blown fuse was for the trailer right turn signal.
 

Airman68

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Interesting. My trailer lights work except for the left turn and brake. It is the truck, tested with a meter. I'll have to verify the fuses.
 

Fless

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Interesting. My trailer lights work except for the left turn and brake. It is the truck, tested with a meter. I'll have to verify the fuses.

Check fuse #3 in the underhood fusebox.

gmc-yukon-fuse-box-engine-compartment-2008-1.jpg
 

TCOLL5830

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I have similar issue on 2015 Tahoe LTZ. I bought a tester to confirm it was not the trailer. (I also checked trailer side by connecting another vehicle and all trailer lights work). Vehicle rt tailights/turn/brake lights all work correctly. So problem is somewhere between connector and the main rear harness. I am betting on connector based on comments on this thread. How difficult is it to swap out the connector ? Are the trailer circuits for brake/turn on their own fuse ? Is there a place on this forum to get wiring diagram ?
 
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Fless

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I have similar issue on 2015 Tahoe LTZ. I bought a tester to confirm it was not the trailer. (I also checked trailer side by connecting another vehicle and all trailer lights work). Vehicle rt tailights/turn/brake lights all work correctly. So problem is somewhere between connector and the main rear harness. I am betting on connector based on comments on this thread. How difficult is it to swap out the connector ? Are the trailer circuits for brake/turn on their own fuse ? Is there a place on this forum to get wiring diagram ?

This thread is for 2000-2006 series. I would recommend posting in the appropriate year for your vehicle, since the wiring and electronics can be different.
 
OP
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OR VietVet

OR VietVet

GMT800 2005 Tahoe Z71
Navy Supporting Member
Joined
Oct 8, 2014
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Willamette Valley
I have similar issue on 2015 Tahoe LTZ. I bought a tester to confirm it was not the trailer. (I also checked trailer side by connecting another vehicle and all trailer lights work). Vehicle rt tailights/turn/brake lights all work correctly. So problem is somewhere between connector and the main rear harness. I am betting on connector based on comments on this thread. How difficult is it to swap out the connector ? Are the trailer circuits for brake/turn on their own fuse ? Is there a place on this forum to get wiring diagram ?
Welcome to the forum from Oregon.
 

TCOLL5830

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Hello OR VietVet,
Welcome home. And thanks for confirming my post made it to cyberspace.
34 years USAF
TC
 

TCOLL5830

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This thread is for 2000-2006 series. I would recommend posting in the appropriate year for your vehicle, since the wiring and electronics can be different.
Thanks Fless.... see what happens when newbie's join ? I'm trying to navigate my way around this forum... will try again
 

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