For some reason my fan won't turn on by itself (when car get's hot).

I wanted to know how to "re-wire' the fan from the THERMO sensor to ECU to RELAY.

I don't know which wire does what or goes where.
please help.

 

From Helm's repair manual but labeled with OBD-1 ECU connections



hth

 

Check yellow wire on ignition switch

Under steeting colum

My fan wouldn't turn on and yellow wire was cracked

Fixed it n now works fine

 

thanks fellas

 

Check the famous G101 ground at the water neck on the back of the motor. That ground point is downright famous for a reason.

 

I might be doing it: see Here I am not blowing a wad on a 2o yr. old ECU!