Passenger side firewall. Are these wires needed?
- Thread starter Tony1968
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Well, they forgot about the pulling the whole dash and removing all unnecessary wires part 
Well that might be a future endeavor. But I don't think so at this timeWell, they forgot about the pulling the whole dash and removing all unnecessary wires part
I have a universal fit Vintage Air heat and A/C unit in my ‘78 El Camino. I put it in about twenty years ago so I couldn’t tell you which model it is and they probably have changed the design anyway. I can tell you it was the first series that had electrically operated blend doors. The only cable was for the heater valve. It fit nicely under the dash, but I had to eliminate the glove box.
I would suggest that you avoid cutting anything out of that harness until you are ABSOLUTELY sure that you will not need that circuit. Although it is likely to contain those defunct and useless wires that used to get connected to the computer// and that ran to the distributor and carb among other places, there are also wires for other circuits, such as the HVAC or heater/AC box and blower motor that might be laced into that bundle. If you are also turfing your AC and heater and substituting a block off plate or welding in a piece of sheet-metal as a permanent repair then they can be edited out also but, again, some wires have a bad habit of serving several circuits at once.
As for selling that harness on E-BAY, possible, but only if it is intact and complete. Cutting off the plugs or connectors pretty much guarantees that you will get fewer looky-lous and even fewer buyers. Any restorer seeking that kind of assembly is going to want it to be as un-molested as possible; think un-used and still in the box, here. You just never know what's valuable and what's not. Would appreciate a few more pictures as you get deeper into editing and deleting wires from that harness. That Is also a pending project for me and a path to follow is always useful
Nick
As for selling that harness on E-BAY, possible, but only if it is intact and complete. Cutting off the plugs or connectors pretty much guarantees that you will get fewer looky-lous and even fewer buyers. Any restorer seeking that kind of assembly is going to want it to be as un-molested as possible; think un-used and still in the box, here. You just never know what's valuable and what's not. Would appreciate a few more pictures as you get deeper into editing and deleting wires from that harness. That Is also a pending project for me and a path to follow is always useful
Nick
Once the computer is out the carb and distributor are gone as well.
There is nothing in that harness that connects to the blower harness
So the blower harness is unique to itself? Good to know. About that smaller bundle of wrapped wires that head off towards the driver's side of things, likely that will end up at the under-dash plug in just below the drivers right knee that used to accept the plug from the code reader or OBD I reader. Just finished popping mine off its mount; it is attached using a pair of hollow rivets which, gently due to all the plastic, you can drill. The bracket to which that plug is mounted is part of the lower mount for the dash and cannot be easily removed unless you cut it away , maybe with a Dremel tool running a micro-cutoff wheel. To get the harness you may have to pull the radio as it is likely clipped in place somewhere along its length and just pulling on it would get you a mess of electrical tape and not much else.
Nick
Nick
Yep I had to pull the radio to get the hvac controls out and to remove the hvac box. There were a couple of 7mm bolts holding it on the inside and the 11 or so on the firewall
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