Trailer light wiring: GM vs The Others?

[Martin Leaney]

I have bought a new GMC Duramax to tow my boat and also my motorcycle trailer (Haulmark Enclosed). Both are new trailers with factory wiring but neither of the trailer's lights work properly with the factory wiring on the new truck!<br /><br />Are GM's different than Fords/Dodges? Any ideas?

 

[DoctorCAD]

Re: Trailer light wiring: GM vs The Others?

My new Ford (Mazda, really) works fine, shoulda bought a Ford! Thats gonna hurt.

 

[Martin Leaney]

Re: Trailer light wiring: GM vs The Others?

I might have bought a Ford but, not being a Doctor, I couldn't afford the expense of fixing it all the time!

 

[poolshark38759]

Re: Trailer light wiring: GM vs The Others?

sounds like a bad ground....<br /><br />could also possibly need a converter since new truck has the amber turn signals and trailers use a stop/turn light....

 

[Martin Leaney]

Re: Trailer light wiring: GM vs The Others?

FYI - I talked to a guy at a truck outfitting company and he says that all new vehicles should use the same wiring/pin outs for trailer wiring. Therefor if the trailer lights work with a new Dodge it should work with a new GMC or Ford etc.

 

[orca1967]

Re: Trailer light wiring: GM vs The Others?

Go to your dealer something is wrong. I bought a new GMC duramax also and had no troubles.

 

[poolshark38759]

Re: Trailer light wiring: GM vs The Others?

make sure the pins match on each side of plug....i had similar trouble and had the trailer plug upside down when i wired it...