Dead AC

Great diagram, I am going to want to discuss further specific to troubleshooting my car, should I start a new thread?
 
Success! There are two 3-prong connectors on the right side of the steering column and they were transposed.
Thank you to all for the wiring diagrams (none of which turned out to be what was under the dash on my car but gave me info to work with)!
 

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Eric V said:
Success! There are two 3-prong connectors on the right side of the steering column and they were transposed.
Thank you to all for the wiring diagrams (none of which turned out to be what was under the dash on my car but gave me info to work with)!
Click to expand...

Hi Eric

Is this a picture of the connectors connected correctly or in the transposed positions (incorrectly connected)?

Thanks!

Bill
 
pmansson said:
Very cool engine.
3,0 L, over square with 3,5 block and 2,5 crank. 339 HP and 422 Nm. Revs up tp 9800. Great sound!
Click to expand...

I know it's a bit off-topic, but I'm curious about the specification of your engine. If I'm correct in my assumption, you've got a 92mm bore and a 71.6mm stroke (B34/35 block and B25 crank), giving you a capacity of 2855cc. Is that correct?
 
billpatterson said:
Hi Eric

Is this a picture of the connectors connected correctly or in the transposed
Click to expand...

billpatterson said:
Hi Eric

Is this a picture of the connectors connected correctly or in the transposed positions (incorrectly connected)?

Thanks!

Bill
Click to expand...
Hi Bill, the picture is hooked up correctly. Looks to me that the AC system was an add-on with a connector in and a connector out, so to install you would disconnect the other 3-prong connectors that go to the heater controls etc and insert the AC system ends, "splicing" the AC in. In this case the AC connector in was connected to the AC connector out like a snake eating its tail, effectively disconnected from everything else.
 
Eric V said:
Hi Bill, the picture is hooked up correctly. Looks to me that the AC system was an add-on with a connector in and a connector out, so to install you would disconnect the other 3-prong connectors that go to the heater controls etc and insert the AC system ends, "splicing" the AC in. In this case the AC connector in was connected to the AC connector out like a snake eating its tail, effectively disconnected from everything else.
Click to expand...

THX Eric!

I may have done the same. My AC system is 'dead' after disassembly, upgrading the pump, condenser, drier, hoses, and reassembling (no electrical changed just unplugged). Odd considering it was working fine before. I will follow sage advise on this and other posts and post the issue and solution.

Cheers,
Bill

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Hi
Thanks again to all who posted regarding the AC systems trials, tribulations and solutions!!

Again...it was a simple fix. I think it goes to show the systems on these cars are durable and issues, in my experience ('74 3.0s, '73 bavaria), are usually easy to fix once diagnosed.

I found 2 issues causing my 'dead AC'. The 1st was a detached ground from the temperature switch and the 2nd was described by Eric above (#25); those 2 connections just left of the console which are easily mixed up.

I addressed both of these and my AC operates as it should. Ignition key on Start, heater fan turned on and runs, vehicle started, AC fan turned on, heater fan stops operating, AC fan turns on, AC pump not turning, turn AC temp switch, AC pump engaged and turning.

All smiles

Regards,
Bill

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