Trailer Light Problems
Thread Starter
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Mountain Pass
Joined: Sep 2003
Posts: 111
Likes: 1
From: South Texas
Trailer Light Problems
I have a 2006 supercrew and since I've owned it, i've had problems with my running lights - they don't work. My stop lights and turn signals work just fine. It happens on every trailer I pull. I've tried switching the half ISO relay #R201 in my manual with another one and nothing happens. Is this the wrong relay or is there something else wrong? Any help is greatly appreciated.
Senior User
Joined: Sep 2003
Posts: 329
Likes: 1
From: Virginia
Trailer lights...
I have been reviewing the wiring information on the trailer light circuit and I going off the assumption the truck in question has the 7 Pin connector...
1. relay # R201 is correct for the trailer marker lamps
2. Fuse # 10 is for the marker lights & the reverse lights (on trailer) "20 amp"
3. 7 Pin connector at rear Brown wire with White tracer is for the the
marker light circuit. In the 7 Pin connector the pin at the top left
(looking into the plug) is for the marker lights. Top right pin will be for
the back-up light circuit
4. The circuit should be hot at the relay at all times with the relay being
switched on/off with the headlight switch.
About all that can be done at this point is to start at the rear and work toward the front...
Hope this helps...
1. relay # R201 is correct for the trailer marker lamps
2. Fuse # 10 is for the marker lights & the reverse lights (on trailer) "20 amp"
3. 7 Pin connector at rear Brown wire with White tracer is for the the
marker light circuit. In the 7 Pin connector the pin at the top left
(looking into the plug) is for the marker lights. Top right pin will be for
the back-up light circuit
4. The circuit should be hot at the relay at all times with the relay being
switched on/off with the headlight switch.
About all that can be done at this point is to start at the rear and work toward the front...
Hope this helps...
Thread Starter
|
Mountain Pass
Joined: Sep 2003
Posts: 111
Likes: 1
From: South Texas
Yes that helped. It was the #10 fuse. I guess that when I saw it in the book I saw the relay and didn't think about the fact that it was listed under the #10 fuse. Thank you very much. 
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