I have a 1991 RS 305 camaro and the heater and AC don't work as in i get no air coming in the car. Heater core gets hot. Blend door works. I have no idea. HELPPPP!!!!!!!!

 

what about the ac blower motor on the passenger side of the engine bay? once you take the cover off it should look like a hamster wheel attached to an electric motor

 

It will turn on then I put it in and it will work then I turn it off then on and nothing

 

Remove the A/C control head from the dash and inspect the wiring.

You will see 2 electrical switches; one is the fan speed one, the other is the "mode", operated by the big lever.

The "mode" switch has one wire that goes over to the fan speed switch, a green wire, and a dark brown wire that's kind of all by itself.

Follow that dark brown up into the dash. About a foot or so up in there, you will come to the connector where it plugs into the main dash harness, which is what supplies power to the entire HVAC system. Attempt to unplug that connector. If you can manage to do so, maybe even before you get that far, you will discover that it is BURNT TO ASHES, because it is the ABSOLUTELY STOOOOOOPIDEST DESIGNED POS EVAH. Besides just being way too small to begin with, it actually uses the plastic connector body to provide the tension holding the electrical contact together. How idiotic can it possibly get.

It will look something like this, except with only one brown wire in it:



Not exactly, but we'll get to that in a minute.

Cut that worthless pile of monkey dung off, both halves of it, and replace it with a pair of the BIG THICK WIDE FAT HEAVY-DUTY insulated yellow slide terminals. NOT, the itty bitty little teeny tiny weeeeeenie yellow slide terminals that are exactly the same as the little red & blue ones except with a yellow shell; locate the BIG THICK WIDE FAT HEAVY-DUTY ones.

Next, open the hood, and find the purple wire to the blower motor. Follow it about a foot or so to a small box with a plug that includes a big fat red wire. Follow that red wire over across the windshield cowl. About another coupla feet, right about directly above the pass side valve cover, you'll come to the connector in the pic (or one very similar), which is of the exact same STOOOOOOOOPID design. Cut the red wires off from it and use the same kind of BIG THICK WIDE FAT HEAVY-DUTY terminals to replace it. If there's a thick black wire in it, cut that one off too, and on the side closer to the blower motor, put a BIG THICK FAT HEAVY-DUTY yellow ring terminal on it, and ground it to one of the ground screws in the firewall right close by, preferably where the braid strap is already screwed, like the place you can see in the photo.