I have a 1991 2wd 22re 5 spd with A/C that the heater blower is not turning on.
I have fought this battle at least 3 times, but it has me down this time.
My question right now is...where does the power come from? Does it come from the switch and then goes to the fuse or the other way around?
This spring I replaced the heater resistor and heater switch. The old resistor crumbled in my hands. It worked for a few times and quit.
I have now replaced the heater relay. Still no good. If I put battery power directly to the blower motor both positive and negative...It runs like a champ. I had considered replacing it but the Blower will no way in hell drop out it is too tight against the firewall and my Toyota Repair Manual gives no instructions other than remove three screws and take it out. HA! Also this spring my Alternator and Starter quit.... If I remember the blower came to life for a few times after this, then quit again. So something electrical may be going on or just age and coincidence. The truck also is difficult to start unless it is cold weather. If I turn on the key, and the heater switch I detect power on the 10 amp A/C fuse--BUT nothing on the 30 amp heater fuse. What does this mean?
I checked the switch I took out this spring with a meter and tested it out as far as the Manual goes and it passed.... So the switch wasn't the problem earlier this spring, but the resistor and something else. I have not double checked the new switch because it is tie-wrapped in.
However, on the wiring harness that plugs into the switch, Pins 8 and 2 are burned. When I put a tester leads on pins 8 and 6 of the harness at the same time I don't detect power. I am assuming this is where the power comes from but I could be wrong. I did notice the harness was burned this spring...but hoped it would not matter as they didn't seem burned all the way through.
HELPPPPPPPPPPPPP!!!!!! And Thank you.