Originally Posted by Memphistahoe02
I have a 2002 chevy tahoe and the heat works but the control switch only works on 3, 4 and 5. 1 and 2 do not work, no air blows out of the system. once you switch it to 3, 4 and 5 it works normally. is there a fuse or something that is causing this? and where do i locate this fuse at? i have searched online and cant seem to find it. thanks guys.
this maybe something completely unrelated but i know colorado's have this problem... Its the harness that plugs into the blower motor and the blower motor resistor.. It shorts out and cooks the resistor. It will work for short periods of time if you wiggle it so its tight.
If you get desperate its something to look into.
Otherwise you could just start checking things on the back of the control w/ your dmm to see if its in the control, before, or after. Just see if you can find a wiring diagram for it first.