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Old 07-13-2007, 05:21 PM
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Kevin 89MC Kevin 89MC is offline
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Truck trailer light harness question

My company truck's (04 TrailBlazer) trailer wiring harness has me stumped. I have no juice at the "running light" pin with lights on, and I know the fuse is good, because I swapped it out with another one as a test. It is the round 7 pin style. I don't have any power at the "12v" lead either (I thought of just re-wiring my 7-4 pin connector to use that one). Harness looks intact, at least what I can see. I replaced the trailer wiring harness a few weeks ago (a few too many splices were giving me intermittent problems), and anyways it works great on the LandCruiser, so I know the trailer is causing no issues.

I just hot wired a lead off the truck's tail light for now. Looks a bit tacky under the truck, but it works. I don't really have the desire to dig into the harness, and I don't really feel like making my company pay for a mechanic to repair it. They're nice enough to allow me to tow my boat with their truck, and their gas card.
Anyone have similar issues with a 7-pin harness? Any other easy things to check?
Thanks,
Kevin
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1989 ProStar 190 with "Safe T Top", 351 Ford, GT 40 heads painted Ford Blue, Elec. Ign, 1:1, 720 hours, 4 blade prop, PP 6.5, removable platform brackets, custom color from factory, hot water shower, Boat Buddy & LED lights on trailer
2010 D3 Z7, 2 @ 32 off, 34 mph so far
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Old 07-13-2007, 06:01 PM
TMCNo1 TMCNo1 is offline
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Have you seen this post?
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Quote: 2RLAKE,
At some point in time people need to wake up, remove their cranial intrusion into their own rectal areas, and take responsibility for their own actions.




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Old 07-26-2007, 04:37 PM
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Kevin 89MC Kevin 89MC is offline
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Were you planning on linking to a post? Or am I jsut blind?
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1989 ProStar 190 with "Safe T Top", 351 Ford, GT 40 heads painted Ford Blue, Elec. Ign, 1:1, 720 hours, 4 blade prop, PP 6.5, removable platform brackets, custom color from factory, hot water shower, Boat Buddy & LED lights on trailer
2010 D3 Z7, 2 @ 32 off, 34 mph so far
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Old 07-26-2007, 05:13 PM
TMCNo1 TMCNo1 is offline
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Quote:
Originally Posted by Kevin 89MC
Were you planning on linking to a post? Or am I jsut blind?

Sorry, apparently it didn't come up when I pasted it, but a fellow member found a second fuse box under the hood of his Trailblazer for his 7 wire harness that had a blown fuse, when there were no fuses blown under the dash and that is how he cured his lighting problem.
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Quote: 2RLAKE,
At some point in time people need to wake up, remove their cranial intrusion into their own rectal areas, and take responsibility for their own actions.





Last edited by TMCNo1; 07-26-2007 at 05:16 PM.
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Old 07-26-2007, 05:29 PM
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Kevin 89MC Kevin 89MC is offline
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Boat: 1989 Prostar 190, 351 Indmar
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Yep, saw that one. I did find the correct fuse box (and tested the fuse!) Thanks Harold.
Kevin
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1989 ProStar 190 with "Safe T Top", 351 Ford, GT 40 heads painted Ford Blue, Elec. Ign, 1:1, 720 hours, 4 blade prop, PP 6.5, removable platform brackets, custom color from factory, hot water shower, Boat Buddy & LED lights on trailer
2010 D3 Z7, 2 @ 32 off, 34 mph so far
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  #6  
Old 07-26-2007, 05:30 PM
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Jkelly Jkelly is offline
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I was just fixin to mention that there is two fuse boxes one under the hood and one under or on the side of the dash. My buddy has an 04 truck and he had the same problem. Found a fuse under the hood blown.
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