AC/Cig Lighter and Accessory Wiring Question

[DeBattista]

Putting a half apart 1972 C10 Factory Air Truck back together. I was wondering if someone might know where the open terminal on the backside of the orange AC harness is supposed to plug-in I was thinking of utilizing it as a constant 12 V source for a clock I added, however I didn’t want to use it if it already has a factory purpose does anyone know what plugs in there? I have taken some photos and apologize they were at night, but you see the terminal which has a connector on it has an open mail plug inside of it. I have scoured my diagrams and can’t seem to find it anywhere what might go to it.

[71CHEVYSHORTBED402]

My 1971 has factory AC. Perhaps this may help. I won't swear by the anti-dieseling wiring, because I didn't install one. But I believe it came factory with one. This is how I understand it - see Blower Motor Relay.

[DeBattista]

Amazing information, I definitely won’t be running that, so that just tells me I can steal that for a 12V positive source. I assume it’s also safe to say this is not a keyed 12V source as I assume the cigarette lighter always has power.

I would just test light it but the engine harness and front harness are not plugged in.

['68OrangeSunshine]

Originally Posted by DeBattista

Amazing information, I definitely won’t be running that, so that just tells me I can steal that for a 12V positive source. I assume it’s also safe to say this is not a keyed 12V source as I assume the cigarette lighter always has power.

I would just test light it but the engine harness and front harness are not plugged in.

Depending on what accessories you intend on running thru the Cigar Plug port, I would suggest an in-line Fuse Holder with a 10 or 15 Amp fuse.
A weak Positive plunger from some accessory plug [GPS, RADAR Detector, etc...] bent over on insertion and shorted across the Ground side of the plug barrel, and I had a big short/electrical fire under my dash. As soon as I smelled the ''blue smoke'' -- I pulled the Negative lead from my Battery. Later I had to cull out and replace a lot of charred wiring from other systems I had looped together in a bundle, trying to make the wiring runs under my dash look neater.
Cheap insurance.

[DeBattista]

Originally Posted by '68OrangeSunshine

Depending on what accessories you intend on running thru the Cigar Plug port, I would suggest an in-line Fuse Holder with a 10 or 15 Amp fuse.
A weak Positive plunger from some accessory plug [GPS, RADAR Detector, etc...] bent over on insertion and shorted across the Ground side of the plug barrel, and I had a big short/electrical fire under my dash. As soon as I smelled the ''blue smoke'' -- I pulled the Negative lead from my Battery. Later I had to cull out and replace a lot of charred wiring from other systems I had looped together in a bundle, trying to make the wiring runs under my dash look neater.
Cheap insurance.

Everything will have its own fuse I don’t play that just tap in with the same power game. I’ve seen too many cars melt. It’s gonna be clock I added in the dash and the radio which has its own inline fuse.

['68OrangeSunshine]

Originally Posted by DeBattista

Everything will have its own fuse I don’t play that just tap in with the same power game. I’ve seen too many cars melt. It’s gonna be clock I added in the dash and the radio which has its own inline fuse.

Good. You're on top of the game.

[DeBattista]

Does anyone know if they make a pigtail that plugs into that or the harness for the anti-dieseling to steal the connector from.

['68OrangeSunshine]

Mostly Anti Dieseling Solenoids are tied into 12 DC in the engine harness, like electric chokes. Never heard of powering one off a Cigar Plug -- if I understood your query.