'01 Chevy electrical probs when towing

[f0cker]

I have a '01 Chevy Z-71 with the tow package, which means a 7-pin trailer wire setup. I tow my 4 wheelers on a trailer with a 4-pin setup. To fix that, I snagged a 7 to 4-pin adapter from Draw-Tite.

I was towing the 5'x8' trailer with the 450 on it Saturday, and whenever I hit the brakes, all the electrical things in the cab would shut off. After I unhooked the adapter, all the electrical worked fine. Is the adapter causing some kind of short in the system, or is this a problem other people have had? I know it's not a major problem, but I don't want any more suprising electrical failures while towing. Thanks for any help....

[TEX]

Your trailer & the adapter are likely not wired the same way. It's reading "running lights" instead of break lights, or something like that. Other possibility is a short in your trailer's wiring. My dad used to blow fuses like crazy in his '90 GMC when he'd tow stuff that wasn't wired the same as his plug. That truck eventually became mine & I had no trouble with it until I got a short in my trailer's wiring system, and then I blew fuses like crazy until I got it fixed.

TEX