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SteveA83




Joined: May 26, 2005
Posts: 1



(Msg. 1) Posted: Thu May 26, 2005 6:41 pm
Post subject: Q45 A/C Problem
I have a 97 Q45 and my a/c compressor will not turn on. I checked the relay. I have constant power , ignition power, but no ground from the computer to kick the relay over. I can power up the compressor from the yellow wire at the relay. I have good pressure on both the high and low sides. Also, using a scanner I was able to go into the inputs outputs of the ecm and saw that the ecm was being requested to turn on the a/c compressor and also to turn on the relay, but I still had no ground at the relay on the gr/b wire. I wondering if any of you have had this problem. I'm leaning towards the pressure switch on the reciever/dryer but not positive. Please Help ASAP

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dieinterim

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Since: Apr 06, 2005
Posts: 18



(Msg. 2) Posted: Mon May 30, 2005 3:23 pm
Post subject: Re: Q45 A/C Problem [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Hi,

If you jumper across the low pressure switch and it turns on, then you
will need to double check your pressure guage because either the guage
is wrong or the pressure switch is defective.

Blake

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