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Old 03-31-2010, 12:31 AM   #1
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Problems with 7 way conector

We just got a 2008 Forest River Flagstaff Shamrock and for some reason none of our exterior running/brake lights will work. We have checked out our vehicle and it is in working order, now I guess it just leaves the trailer. I didn't know if there was a fuse in the trailer that could be causing the problem or if I should look elsewhere. If anyone has any advise it would be greatly appreciated.

We are pulling it with a 2002 Chevy XLT.
Thanks in advance.
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Old 03-31-2010, 12:35 AM   #2
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Start with an automotive test light, make sure you have a good ground, on your TV find the hot wire, then start trouble shooting to make sure your lights are working at the plug. Then, on the trailer side of the plug start testing to see if you have power through the plug, then follow the wires back, checking to see if you loose power somewhere. I have no knowledge or experience in whether there are or are not fuses in the trailer for this system. Good luck.
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Old 03-31-2010, 04:50 AM   #3
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Here is how the diagram is set up from the trailer to the truck.
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Old 03-31-2010, 06:20 AM   #4
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Some of the Chevys require a fuse put into the engine compartment block to make the tow plug work at the trear bumper.....
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Old 03-31-2010, 07:23 AM   #5
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If none of the lights work I'd suspect a grounding issue.

How did you make sure the vehicle side was ok? Did you use a tester or hook it to another trailer?

Use Rockwood06's diagram to troubleshoot both sides and report back.
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Old 03-31-2010, 10:41 AM   #6
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None of the trailer exterior lights, clearance, brake, turn, parking, are fused inside the trailer. Did you have trailer brakes? Sounds like you didn't get the trailer wiring plug fully seated.
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Old 03-31-2010, 11:29 AM   #7
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Quote:
Originally Posted by Bama Rambler View Post
If none of the lights work I'd suspect a grounding issue.
X2 here. Grounding issues can cause all kinds of problems. Can't rule out a bad socket or plug either. I've had sockets that test good through from the pin to the back side but are still bad. Drove me nuts and after a day of troubleshooting the wiring I installed a new socket and all was good. Be methodical and take your time and make sure you have good grounds.
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Old 03-31-2010, 11:42 AM   #8
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what's a Chevy XLT? i thought the XLT was a Ford thing?
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Old 03-31-2010, 08:49 PM   #9
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Quote:
Originally Posted by 2008Wildcat View Post
Some of the Chevys require a fuse put into the engine compartment block to make the tow plug work at the trear bumper.....
This fuse spoken of here is only relative to the hot wire, has nothing to do with the other connections
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Old 03-31-2010, 09:15 PM   #10
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Does Cheby use relays like Ferd? I had to install a fuse and some relays in the 2000 F-250 to get the plug to work.
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