Bought a new 04 Suburban with tow package. Moved the old controller from the 99 Silverado with tow package to new Suburban with tow package. Installed fuse in under hood fuse block but used old wiring. I have a TENOSHA(?) brake controller. When I hooked up the trailer, it doesn't work unless I use the manual lever...whazz up wid dat? New pig tail that came with the vehicle had four wires. Old controller said CLEARLY on it: ONLY HOOK UP THREE WIRES. NO OTHER WIRES SHOULD BE HOOKED UP. HOOKING UP ADDITIONAL WIRES CAN CAUSE DAMAGE TO THE CONTROLLER. So now what?
- posted
19 years ago