what kind of trailer connector do you have ? the round 12 pole.., the round 6 pole.., the 7-pole.., or the flat 4 pole ? (pole=pins in connector)
I got diagrams for all of them....(well most that my company buys/sells..)
Also are you trying to wire the traler connector to you vehicle or just trying to wire up the trailer ??
Here is the part numbers for the correct harnesses for the truck to trailer harness:
Chevy / GMC 1968-84 Pickup (All Sizes) 1973-84 Blazer, Suburban, Jimmy | 41105
Chevy / GMC 1984-91 S10 Blazer / S15 Jimmy (2-Door Only) | 41205
Chevy / GMC 1985-87 Pickup (Full Size) 1985-91 Full-Size Blazer, Jimmy, Suburban | 41115
Chevy / GMC 1985-97 S10 / S15 Pickups | 41115
Chevy / GMC 1987-96 Van (Full Size) (Except Express / Savana) | 41305
Chevy / GMC 1988-98 Pickups (Full Size, including dual wheel) 1992-99 Full-Size Blazer, Yukon, Tahoe, Suburban | 41125
Chevy / GMC 1992-94 S10 Blazer / S15 Jimmy (2-Door Only) | 41215
Chevy / GMC 1995-02 S Series Blazer / Jimmy / Bravada (splicing required ) | 41225
Chevy / GMC 1996-99 Express / Savana Van | 41325
Chevy / GMC 1999-00 1500 Silverado, Sierra (splicing required ) | 41145
Chevy / GMC 1999-02 2500 / 3500 Silverado, Sierra 2000-02 Tahoe / Yukon / Suburban | 41155
Chevy / GMC 2004-08 Colorado and Canyon | 41165
Chevy 2004-06 Equinox | 41235
Chevy Venture Van | 41365
Chevy / GMC 2500HD / 3500 Silverado, Sierra (Classic) 1999-2007 Avalanche 2002-2007
Silverado, Sierra 1500 (Classic) 2003-2007 Suburban / Tahoe / Yukon / Yukon XL 2000-2007 Trailblazer / Envoy 2002-2007 | 40955 4/7 multi tow option *(With factory 7-way towing package)
Pics of the diagrams of what I got on file at work:
4-pin connector wiring diagram
6-pin trailer wiring diagram:
7-pin trailer wiring diagram:
12 pin trailer wiring diagram:
(Note: It just the same as a 6 pin.., but has the male and femaile of the deal in pic)
Hope this helps. If ya can figure it out from the pics above.., let me know.
There is a few more pin-types (depending on the vehicle and wiring design of vehicle/trailer.., if yours not listed..., msg me.. I try to find info on it...
AS for what you've done to your rides wiring.., I have no idea. Ya may want to trace it down with a test light and see just wtf is going on.