Ronald C.
Well-Known Member
Is there any “major” diff in AC and Non-AC harness. Trying to locate a replacement (1974 Dart Spirt) and found a non-ac harness. Is it easy enough to retrofit a non-ac harness to work?
Got an idea on $?I got a 74 a/c harness for a duster should be same.if ya looking
The a/c wiring under the hood for mine just involved adding a wire into one of the three plugs. Pretty easy. Classic or year one sells the under hood harness pretty cheap. I bought one for mine. Make sure you grease up the bulkhead connectors before remating them.
Thank you Jim! That makes things much easier, I did not know that.1973 Dodge Dart Parts | MA4551 | 1970-74 Mopar A-Body ac/Heater Engine-Side Harness | Classic Industries
Green is the blower motor, blue is the compressor. The bare plugs plug into the connector that has the wires to the wiper motor. Has the connectors to first run up to the low pressure switch in the AC dryer in the grill before back tracking to the compressor clutch.
Got it.My impression from your thread is that you are replacing the harness in front of the firewall. Check the application charts, but that harness is usually not different between AC and nonAC (at least that was true in 1970) The wiring for the AC under the hood is a separate little harness. The big differences and the substantial AC harness is under the dash, like someone mentioned earlier.
Thank you Jim! That makes things much easier, I did not know that.
You will have to look inside to figure out which position the blue and green wire are in the firewall connector. That changes from year to year.
Nope I use the originals.Makes sense. I figure I will need to double check a few things when plugin it up just to make sure things are correctly located....
On a similar yet separate note, have you any experience with using aftermarket gauges? Since I am moving away from the OEM cluster, I will need to retro the multi-pin connector that plugs into the factory circuit board. Was just wondering how that fairs.....
I have a temp and oil pressure gauge mounted under the dash. Much more accurate than the crappy original ones. That is easy. If you are replacing the dash there is a lot of good info here.
Which honestly, is probably cheap insurance in the long run. I have enjoyed doing the work thus far. But I things tend to be far less fun when you do them the second time around....Yeah, like to keep an eye on things too on an old car. I suspect that you will be able to use the OEM wiring, just have to swap out the original sensors for ones that match your gauges.
You can buy a new under hood engine harness as well which is cheap insurance. A new dash harness is harder to swallow at $500 and not as obvious if you are going to need to cut it up for the new cluster.Which honestly, is probably cheap insurance in the long run. I have enjoyed doing the work thus far. But I things tend to be far less fun when you do them the second time around....
You made my day. Those were the last two wires under my hood that I couldn't figure out. They were just exactly as you said. Now I know, thanks much1973 Dodge Dart Parts | MA4551 | 1970-74 Mopar A-Body ac/Heater Engine-Side Harness | Classic Industries
Green is the blower motor, blue is the compressor. The bare plugs plug into the connector that has the wires to the wiper motor. Has the connectors to first run up to the low pressure switch in the AC dryer in the grill before back tracking to the compressor clutch.
I think I’m following, but the AC portion was only $40, and this did not include any of the other “engine “ wiring, this is what you are saying, yes?On my 73 Sport I bought new under dash harness and the a/c harness was a two piece thing. The under dash piece and the engine side. The engine side was only around 40$ if that and plugged into one of the three connectors if your car is already an a/c car you just need that one piece.