86ltrain Posted December 8, 2010 Share Posted December 8, 2010 Hello all, I just bought a 1996 CH model Mack and when I got it home noticed that someone had hacked into the cooling fan wiring. They had a switch rigged into the cab that controls the fan, bypassing all of its automatic function. Can anyone tell me if the computer turns the fan on/off? If so wheres the relay? I only have 2 temp senders, one for the gauge, one for the computer. I believe I have 4 wires going the the fan solenoid, I'm assuming at least one is for kicking the fan on for the AC/defrost? Any help would be appreciated, can anyone steer me towards a good wiring diagram?Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/16774-i-need-help-with-fan-wiring/ Share on other sites More sharing options...
poonamt93 Posted January 14, 2011 Share Posted January 14, 2011 I sounds as though the blower motor resistor is bad... but it could also have a blower control switch with a problem, I would suggest trying a resistor first because that is the most common problem with the symptoms that you gave. Quote Suzuki ATVs / PickupTrucks Link to comment https://www.bigmacktrucks.com/topic/16774-i-need-help-with-fan-wiring/#findComment-70449 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.