Trailer Tow Wiring: Is there a hidden 'inline' fuse on a 04/6 cy trailblazer? All tow fuses check good but have no (12vdc) running lite (brown wire) at tow plug or cap. Can not access other plug due to routing. All other lites work so assume all plugs/connections are O.K. Thanks.
Wow...i just experienced same thing. had my mechanic ck it while working on other things and he replaced a tr fuse that made everything except the running lights work. so i found the hidden fuse box under the rear seat and found a "trailer park" fuse broken. replaced it and still nothing. so proceeded to ck all fuses. later walked back to tr and run lights were on. not sure what or why... but only getting 6 v vs 12v. but they do ligh,t dimly.
Additional, dedicated, Fuse box under rear seat.
There are seperate "trailer" fuses in the fuse box in the engine compartment. Separate fuses for trailer left, right and running lights.
Check all fuses, I had the same issue before.
Good luck.
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The trailer plug is a 4-wire plug into a 7-wire adapter on the vehicle. All turn/flashers/brake lites work. The running lites do not have (12Vdc power before input into the vehicle tow plug or cap. I have checked all fuses (including the larger [#32] fuses and plug wiring, (including vehicle tow plug cap). Everything checks out. Power was applied to the brown trailer wire and the running lites on the trailer work. It is possible there is a broken wire or plug connection but I assume, because the other lites work, that is not a problem area. I would have to run a continuity check to make sure but this is difficult at best. The only other thought is a in-line fuse as I have run into this in the past. I am not sure of this in this Trailblazer. Thanks for yoour response.
Need to know if you are using a 4...6...or 7 wire Vehicle to Trailer socket, and ditto for the trailer itself. Regards DT
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