Join Date: Sep 2000
Location: Shrewsbury, MA, USA
Re: Factory A/C delete
four wires come off of the switch in the dash, one of them is going to be hot when the switch is in one of 4 positions, low, med-1, med-2 and hi,. from there power goes to the blower motor resistor (that was also on your evaporator case) in the 3 lower speed settings. The 3 different resistors control the speed of the fan in the lower settings. From the resistor it goes to the fan motor in the orange wire, and then to ground via a black wire attached to the metal flange of the blower motor where it attached to the evaporator housing. For high speed operation, power came from the hi speed switch output and picked of the coil of the relay mounted on top of the evaporator. The relay supplied 12V from the battery (there was a wire with a fuse holder in it inside the gutter above the distributor) to operate the fan since the wires under the dash are not large enough to hangle the current. The output terminal of the relay is connected to the output wire from the resistor to feed the blower motor.
You need both the original blower motor relay and resistor from the old evaporator housing to make the system work. Hopefully you still have the resistor setup, since it isn't repro'ed and its different than all other year Camaro resistors. They are hard to come by.
1969 Indy Pace Car
350/300HP RPO Z11
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.