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Discussion Starter · #1 ·
well, i just got a 99 GMC 2500 truck, short bed x-cab. it came with a teconsha brake box installed. It does not appear to work. no light, no brakes. its a 4 wire model. red/hot with pedal down. black/hot all the time. white/appears to be ground. and light blue/ unsure of its purpose. the blue wire, when toucked tom a ground, does make the small light light. everything seems to be wired up, cant find a special fuse anyplace. going to tellico friday, need a little help. if it matters, I am towing an xj on 35's on a 20 foot dual axle car hauler. help' please. Dave
 

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Discussion Starter · #4 ·
brakes

Thanks for the help. big thanks to FRYMAN. turned out, when i built the extension from truck to traileer (it didn't reach) I put the red wire in the suggested place. Turns out it was in the center pin on the truck and trailer. easy fix. Now I feel much better about this trip. Thanks. DAve
 
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