i have an idea and need help figuring it out.
Ok im putting my tc fan harness back together and the extra stuff taken out. So now i have an idea to put a switch in here so if and when the ircm fails i can just flip the switch to turn the fan on and off. But would not hinder the opperaton of the ircm. The only way i can figure this out that the switch would have to be on to even make the fan kick on if the relay opens. plus a diagram of this setup would help me out. And its a 88 tc.