jens94850 Posted March 7, 2005 Report Share Posted March 7, 2005 Any ideas why I would be getting no signal from the ignition control module to the main ac relay? 1994 850 manual climate control.If I put 12v to the line from icm to relay, the switch and relay operate and the compressor kicks on. What tells the icm to send power to the relay? b28 from the icm.For the time being, I have the relay jumped....but I'd like to know the cause. The system is fully charged and all fuses are good. Link to comment Share on other sites More sharing options...
Bay13 Posted March 8, 2005 Report Share Posted March 8, 2005 Model and year of this car? Link to comment Share on other sites More sharing options...
MrWinkey Posted March 8, 2005 Report Share Posted March 8, 2005 If your talking about your 94 I would suspect a pressure switch problem on your line Link to comment Share on other sites More sharing options...
jens94850 Posted March 8, 2005 Author Report Share Posted March 8, 2005 Model and year of this car?←My 1994 854 na. Link to comment Share on other sites More sharing options...
jens94850 Posted March 8, 2005 Author Report Share Posted March 8, 2005 If your talking about your 94 I would suspect a pressure switch problem on your line←Jumping the pressure switch makes no difference. I pulled the icm out and put it back in and had signal for the first use. turned the car off and again, no signal. The signal from stich to relay is good. If there is hot to relay terminal from icm, then the rest of the system works...cycling, pressure sensors, etc. This one is a goblin to me. Link to comment Share on other sites More sharing options...
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