Quote:
Originally Posted by dmjlambert
The relay is on the right side of the heater core box behind the glove box, very inconvenient to get to unless your glove box and/or heater core box happens to be out.
There is no CIG fuse, the CIG position on the fuse box is unfused always-on power. Normally a 12 gauge red wire connects there and that red wire goes to the cig lighter. The 12 gauge red wire has a piggy back connector on it that looks like this:
There should be a 12 guage orange wire that will plug into the piggy back connector on the red wire. That goes to the high speed relay. Here is the wiring diagram for the A/C system showing the orange wire going to the relay.
https://67-72chevytrucks.com/vboard/...d.php?t=844482
I can’t tell very well from your picture but I think the orange wire plugged into IGN UNFUSED with the piggy back connector on it is probably something smaller than 12 gauge and may be powering something else. I’m not sure about the 12 gauge red wire you have plugged into the ING UNFUSED because I don’t see a 12 gauge piggy back connector on it. So I’m thinking it probably isn’t the one for the cig lighter.
I think it is likely the wire I point to with arrow 1 is the high speed relay 12 gauge wire, and arrow 2 the cig 12 gauge red wire piggy back, but can’t tell where they are plugged in or if they are plugged in, so I’m afraid it is just a guess. If that is not plugged in, it probably needs to be plugged into CIG position.
Attachment 2440415 |
Ok so arrow one is in the first pic. It's plugged in, but it also has another red wire with that plug. It's plugged in to a slot that says GL Box above it. That plug looks like the one you posted with the two red wires on the plug. The only difference is that it has a yellow wire as well. That yellow wire has a connector on the end and was just taped off.
In picture two, you can see that there is a piggy back on that red (arrow #2) wire that has an orange AND a yellow wire. The yellow wire is not connected to anything, but the orange wire goes up in to a loom that heads towards the passenger side.
Picture three is everything I said in one pic.