Vintage Air Gen IV Wiring Question - Lateral-g Forums

ItDoRun · #1 10-10-2015, 06:13 PM

I'm finalizing all my wiring so I can turn the key (finally!!!) and have a question on the VA wiring. My PRC electric fan wiring diagram show that the "12V ignition" wire coming from the relays needs to obviously go to an ignition source (which I've located) AND the "A/C Thermo Switch". I assume it's the blue wire coming off the A/C compressor relay but am not sure. Anybody know?

Vega$69 · #2 10-10-2015, 07:04 PM

There are a couple ways to get the fans to turn on with the ac. The best way is a trinary switch on the AC dryer. It replaces the binary switch that comes with the VA system

ItDoRun · #3 10-10-2015, 09:39 PM

Quote:

Originally Posted by Vega$69

There are a couple ways to get the fans to turn on with the ac. The best way is a trinary switch on the AC dryer. It replaces the binary switch that comes with the VA system

I should have been clearer in my post. I'm using the VA trinary switch. So I have a wire from the compressor to the trinary switch, a ground, a wire from the trinary switch that ties into Fan 1 which is controlled by the ECM, and the wire in question is from the trinary switch to the AC Thermostat as stated in the PRC radiator instructions. The only wire left in the VA harness is the blue wire so I assume that's the feed to/from the ac thermostat?????

The "key on" ignition source for my electric fans is also supposed to tie into the ac thermostat switch as well. It's probably staring me in the face but I see nothing in the VA instructions about this ac switch.

snappytravis · #4 10-11-2015, 06:35 PM

Quote:

Originally Posted by ItDoRun

I should have been clearer in my post. I'm using the VA trinary switch. So I have a wire from the compressor to the trinary switch, a ground, a wire from the trinary switch that ties into Fan 1 which is controlled by the ECM, and the wire in question is from the trinary switch to the AC Thermostat as stated in the PRC radiator instructions. The only wire left in the VA harness is the blue wire so I assume that's the feed to/from the ac thermostat?????

The "key on" ignition source for my electric fans is also supposed to tie into the ac thermostat switch as well. It's probably staring me in the face but I see nothing in the VA instructions about this ac switch.

Just found this on the internet, Don't know if this will help you or not, but it's worth a shot. I get screwed up on wiring sometimes and start all over with each wire where it goes.

ItDoRun · #5 10-12-2015, 11:26 AM

Quote:

Originally Posted by snappytravis

Just found this on the internet, Don't know if this will help you or not, but it's worth a shot. I get screwed up on wiring sometimes and start all over with each wire where it goes.

I saw that but after calling VA they said the trinary switch doesn't need to be grounded and to route the ground wire that I installed per instructions to a 12V ignition source. This makes no sense because I have a violet wire that is tied into a key on source per their wiring diagram.

Vega$69 · #6 10-12-2015, 12:17 PM

Quote:

Originally Posted by ItDoRun

I saw that but after calling VA they said the trinary switch doesn't need to be grounded and to route the ground wire that I installed per instructions to a 12V ignition source. This makes no sense because I have a violet wire that is tied into a key on source per their wiring diagram.

Mine is per the diagram and works perfect.