Mangled A/c Wiring! - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 12-02-2004, 05:11 PM
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I'm a chevy guy so bear with me.

I couldn't get my A/C compressor to come on. Come to find out that I was missing the suction line and low pressure switch

Added parts and system takes and holds a charge now, but the compressor won't kick on. There is a clipped black/brown stripe wire coming from the high pressure (green terminal) switch. And it looks like the wire that goes to the Bosch compressor was ripped/burnt off.

I've looked around in junkyards, but alot of them have nippondenso systems, or the newer Bosch systems that look like mine, but not close enough.

I would try to connect the clipped wire to the compressor, but there is also a harness hanging out that's not attached to anything. Thx for the help, it's December here in Florida and i'm sweating my ass off

I'll get pics up ASAP so you can see what I mean

-1985 4dr 318i
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#2 (permalink) Old 12-03-2004, 11:17 PM
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yeah need pics and i can compare it to my fully functional battlestation...um
excuse me fully functional A/C system...

too much Star Wars...

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#3 (permalink) Old 12-04-2004, 07:05 PM
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ok, I connected the suspected wire and the compressor kicked on and sounds like it's running ok

It takes a charge but doesn't cool, high side gets warm, low side doesn't get cold, and the pressure is marking a little high on the gauge ~60psi. There are still bubbles in the sightglass after 2 3/4 cans used

Since the system was open for so long, the oil is brown. I'm thinking of doing this in this order to fix it:

Drain excess/all oil?
Expansion valve
Dryer
All of the above

Any suggestions? This worked on my IROC (compressor took a crap and contaminated oil which destroyed orifice tube and drier), dunno if the same goes for BMW's
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#4 (permalink) Old 12-04-2004, 10:57 PM
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you sound much more experienced about A/C systems than i feel.
but im great at common (chevy-chase) mistakes.

have you checked to see if the pump pully is rotating the correct way.

what would that do?
check for small leaks ?

pics please...[attachmentid=15844]
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