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Dave - Can you post your 1972 Wiring Diagram, please. My copy is far too dark to read properly (at the fuse panel in particular which is where I'm evaluating). Thanks.
Yep...gimme a few...watching TV with the missus at the moment. And you want the whole diagram, correct?
No worries...watch TV. Yeah, entire diagram, please.
Here's something to ponder in the meantime...what if the end where we see the red connector is where the power source starts, and what if it's the power wire for the a/c compressor, and what if the other end of that wire is loose also? That would explain why I got no voltage in that wire whether key is on or off, correct?
Here's something to ponder in the meantime...what if the end where we see the red connector is where the power source starts, and what if it's the power wire for the a/c compressor, and what if the other end of that wire is loose also? That would explain why I got no voltage in that wire whether key is on or off, correct?
That's a possibility, I suspect. I was going to ask you a follow-up question pertaining to this anyways just waiting for the correct timing. When you measured voltage, you measured voltage when key was not in ON position, when key was in ON position, and when key was in ACC position? Hate to ask the last question - yet. Does your car have an operating A/C or has it been disconnected?
And, of course, lodged in the back of my cranium is the notion you still haven't validated - where is the ground wire for your blower motor? Because the blower motor is "operating" does not mean your wiring is optimum & there in lays a possibility of something "askew" somewhere in the A/C heater wiring labyrinth (possibly).
That's a possibility, I suspect. I was going to ask you a follow-up question pertaining to this anyways just waiting for the correct timing. When you measured voltage, you measured voltage when key was not in ON position, when key was in ON position, and when key was in ACC position? Hate to ask the last question - yet. Does your car have an operating A/C or has it been disconnected?
Voltage checked with key off and in the run position. No power to the wire either way. And no A/C compressor, so suffice to say it's non operating...lol.
Voltage checked with key off and in the run position. No power to the wire either way. And no A/C compressor, so suffice to say it's non operating...lol.
Ah, well. That makes a difference in diagnostics/troubleshooting since we might likely "suspect" some of these wires are germane to the A/C Heater circuit then - am I correct - you have no A/C compressor in your car?
Ah, well. That makes a difference in diagnostics/troubleshooting since we might likely "suspect" some of these wires are germane to the A/C Heater circuit then - am I correct - you have no A/C compressor in your car?
Dave - Nothing further can be gained attempting to evaluate the function of that dangling wire beyond what we've already discussed. It has no power & evidently any suspects you've evaluated thus far (Heater/AC & Hazard/Stop Lamp Switch) are functioning. You have no AC compressor & the wiring demonstrates significant departures from OEM wiring. You'd have to completely trace all wires from their origins to where they terminate to gain meaningful results. There's simply too much going on in the wiring where guessing isn't going to provide meaningful results.
I count likely five wires w/ three splice connectors emanating from the fuse panel IGN position. There's absolutely no way of determining function of any of those wires w/o tracing them from beginning to end. Unfortunately, you're left in a complete state of quandary.
You "might" gain "some" knowledge but only a tiny glimpse into some function if you remove the wire connected to the fuse panel IGN position since that position is only power sourced when the ignition is ON. I hate to tell anyone to simply place an unknown wire into a state of limbo, but as you've suggested I guess you tape it off and tuck it under the dash at this point. You'll likely never visit that wire during your entire ownership unless you elect to install a functioning AC compressor.
Dave - Nothing further can be gained attempting to evaluate the function of that dangling wire beyond what we've already discussed. It has no power & evidently any suspects you've evaluated thus far (Heater/AC & Hazard/Stop Lamp Switch) are functioning. You have no AC compressor & the wiring demonstrates significant departures from OEM wiring. You'd have to completely trace all wires from their origins to where they terminate to gain meaningful results. There's simply too much going on in the wiring where guessing isn't going to provide meaningful results.
I count likely five wires w/ three splice connectors emanating from the fuse panel IGN position. There's absolutely no way of determining function of any of those wires w/o tracing them from beginning to end. Unfortunately, you're left in a complete state of quandary.
You "might" gain "some" knowledge but only a tiny glimpse into some function if you remove the wire connected to the fuse panel IGN position since that position is only power sourced when the ignition is ON. I hate to tell anyone to simply place an unknown wire into a state of limbo, but as you've suggested I guess you tape it off and tuck it under the dash at this point. You'll likely never visit that wire during your entire ownership unless you elect to install a functioning AC compressor.
Norm- so are we at least in agreement that the wire is for the A/C compressor? And as far as the "crows nest," I'm pretty sure they are for an aftermarket radio that a PO installed that I have long since removed. I'm not inclined to bother with them at this point until I venture down the road of installing a working radio
Norm- so are we at least in agreement that the wire is for the A/C compressor? And as far as the "crows nest," I'm pretty sure they are for an aftermarket radio that a PO installed that I have long since removed. I'm not inclined to bother with them at this point until I venture down the road of installing a working radio
No. I am not in agreement the "dangling wire" is for the A/C compressor - 100% absolutely not in agreement.
Being pretty sure doesn't say anything to me. Unplug the wire leading into the IGN fuse panel position, turn the car to ON &/or start the car. Turn ON all devices in your car. Is there ANYTHING which is NOT operating/functioning? Look, if you are only "pretty sure" that crow's nest is for an aftermarket radio you have long since removed - why is it even connected to the IGN fuse panel position? Get rid of it, remove it from the fuse panel and tie it off.
No. I am not in agreement the "dangling wire" is for the A/C compressor - 100% absolutely not in agreement.
Being pretty sure doesn't say anything to me. Unplug the wire leading into the IGN fuse panel position, turn the car to ON &/or start the car. Turn ON all devices in your car. Is there ANYTHING which is NOT operating/functioning? Look, if you are only "pretty sure" that crow's nest is for an aftermarket radio you have long since removed - why is it even connected to the IGN fuse panel position? Get rid of it, remove it from the fuse panel and tie it off.
Norm, after taking a second look, those wires are for the aftermarket gauges.
Y'all are rearranging chairs on the deck of the Titanic squabling over that wire. That red connector is actually some sort of official GM connector, and what's more, somethimg is still stuck in there! You can see the three prongs of the wrong end of a male spade connector sticking out of the red plastic. That split ended male connector can be pulled out of the female spade connector inside that red plastic cover. The male spade looks like it was pulled out of a circuit board of some kind, most likely by accident. That orange wire with the red plastic insulator on it is just a short jumper and you might find all three ports of the black connector are tied together.
What you need to find out, is where the red wire with black stripe(s) goes. If it does indeed feed your compressor, check the back side of your A/C control panel for a broken connector!
