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  #1  
Old 05-02-2007, 01:10 AM
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Location: Jacksonville, Florida
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300cd a/c ???????

Hey thar,

Ok, new comp, drier, exp. valve, flush, all up to snuff.
Compressor pumps with jumper wire yet I can never get it to run off the a/c controls.

Is this the famous control unit or is there a relay somewhere???

Thanx,
Dave

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  #2  
Old 05-02-2007, 02:01 AM
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What year is the CD Dave?
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  #3  
Old 05-02-2007, 02:36 AM
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My '83 SD has yet to turn on compressor. Not being told, is my assumtion, yet heat temp works. The '84 CD A/C works fine. Am interested in other responses. I understand there is a relay in the CCU.
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  #4  
Old 05-02-2007, 09:13 AM
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Thanx for the quick help guys it is getting hot in Florida,
Hate to take a date out and have her sweat, at least in the car that is.

84CD . Got power to the pressure switch. just nothing to fire up the a/c clutch.

Thanx,
Dave
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  #5  
Old 05-02-2007, 09:16 AM
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date sweating while you are only driving the car is not conducive to sweating in other settings...
John
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  #6  
Old 05-03-2007, 10:35 AM
KCM KCM is offline
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Quote:
Originally Posted by myssrhl View Post
Got power to the pressure switch. just nothing to fire up the a/c clutch.
Bad pressure switch???? Jump the wires going to the switch at the switch. If the compressor runs, it's the switch. If you have power to the pressure switch and the system has some refrigerant (pressure), sounds like the switch to me.
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  #7  
Old 05-06-2007, 01:55 AM
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Yep pressure switch.

Funny thing tach has not worked in years. fixed the a/c and bam the tach works. Huh? weird.

Thanx everyone
Dave

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