73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Interior & Equipment => Heating, Ventilation & Air Conditioning (HVAC) => Topic started by: 123 pugsy on November 10, 2011, 03:28:08 PM
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Can anyone help identify the color of wires going to the pins of the relay in the attached pic?
This is the only new harness I could find. The wiring on my 76 has a different pin position on the relay.
The numbers on the sketch are the numbers on the relay.
Thanks,
Pugsy
Edit:Info in case anyone wants to change over to the newer style harness.
#1 and #2 need to cut the wire that comes with the new harness close to the terminal and solder the 10 ga wire on directly.
#1 is PPL 10 ga to blower
#2 is OR 10 ga BATT
#3 is BLK ground
#4 is OR from switch (HIGH) This activates the coil.
#5 is DK BL from resistor
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Have you looked at the wiring diagrams here:
http://forum.73-87chevytrucks.com/smforum/index.php/topic,11766.0.html
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Yes. I checked those already.
None of the diagrams have the relay.
If someone had a harness they could look at would do it nicely.
This is the later style.
Thanks.