Hi everyone! I am the proud new owner of a 75 coupe! This is my 2nd vette but my first vette was a c2 and that was 30 years ago. I have traced a high speed fan problem down to the fusable feed wire to the relay...... it's been cut by the throttle cable. I saw the harness that it was cut from but it too goes nowhere, it dead ends at a high2 wire clip just hanging by the oil pressure sender. Where do these wires go to.... I'm reading and finding it should go to the horn relay but I'm not finding that either. Yourhelp is greatly appreciated!

High speed blower feed should come from the junction block on the drivers side inner fender. The horn relay has nothing to do with feeding anything on the '75 except the horn. The horn relay, btw, is inside the cabin, usually taped up in the harness to the left of the fuse box.
I emailed you the service info on all '75 GM manual HVAC systems, including the wiring diagrams. That should help.

|UPDATED|12/4/2016 7:38:18 PM (AZT)|/UPDATED|

Can you post a picture of this junction block. I can't find it and don't see how I could be missing it! This is the plug that was on the end of the fused fan wire.

Wiring Image 1

Image 2


(large image modified to link-aapple)


|UPDATED|12/4/2016 7:44:22 PM (AZT)|/UPDATED|