deserttoy84

Im working on a 90 4runner and the entire electrical system for the A/C and heater doesnt work. It stopped working when the battery died. Ive tried a new resistor but the resistor isnt even getting power. Only thing that works is one of the relays next to the A/C and heater fuses. it clicks when i switch the fan switch from off to any speed or vise versa. Ive checked every fuse on the entire vehicles and tried replacing the relays with some spares I have. The same time the blower stopped working the A/C switch doesnt work either(doesnt light up) which im thinking is because the fan doesnt work. Also, dont know if this is related but the Cruise control also stopped working at the same time everything else died. If anyone has an idea It would be greatly appreciated!!

raydouble

FSM here
http://www.ncttora.com/fsm/1990-1995...5/contents.htm

Check the ground at the left kick panel circle in red, it's for the cruise and the blower motor..... amongst other things.

toyNG

My blower motor went out a few months back. I replaced the brushes with ones provided by 4crawler. Another option is to just buy a whole new blower motor, which will be less work than replacing the brushes.

I'm not sure what to make of the cruise control though

deserttoy84

I figured it out... turns out some guy wired his truck wrong when he got a high amp alternator installed. he went directly from the alternator post to the battery instead of going into the fuse box under the hood which in turn gives power to heating and air system. Still cant figure out why the cruise doesnt work though. o well the heater is boiling hot and the A/C is 40 degrees