who has a 74 chassis manual

[74 challenger]

ok if you have one can you tell me what feeds the 4th prong on the fan blower switch and were does it come from I dont see on the dash harness a wire for it or send me a pic of the wiring diagram also have a 2 wire female plug and no one knows what it does or what its for. Thanks Dave

 

[74CudaDave]

I have a chassis manual. Is this an A/C equipped car?

 

[74 challenger]

yes it is and my ac/heat blower switch has 4 prongs on it.dark green,light green and black.Top prong on switch? What color wire and how is it feed?The 3 wires are in a plug so Im at a lost on the 4 prong. thanks

 

[74CudaDave]

I see you've got a post on cuda-challenger.com, the pic you got there is the same info as mine - 3 wires only, same colors as described. Does your blower not work?

 

[74CudaDave]

Here's the page from my 1974 Chassis Service Manual

 

[74 challenger]

thanks to all, slotts told me i have the wrong switch. Once again yearone was WRONG. It was rigged when i bought it. Replaced the switch and that was wrong also.

 

[74 challenger]

Thank you 74cudadave