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Clutch wont kick in Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum jeeweav New User May 18, 2008, 6:28 AM Post #1 of 3 (2302 views) Clutch wont kick in Sign In 1992 Buick Regal all switches test good and have 12 volts positive at the connector and a dim ground. is the ground controled by the ECM? Tom Greenleaf Ultimate Carjunky / Moderator May 18, 2008, 6:46 AM Post #2 of 3 (2296 views) Re: Clutch wont kick in Sign In ? Does this use a LPCO or thermistor for clutch control? If static is about in psi as temp in F then clutch might be out of spec but I worry about a dim ground test as I think ones that do use ECM are directing ground not +12v to engage clutch. Will Clutch snap to with a tap when voltage is present? Carefull of course with a running engine - could be tested with engine off too. If that works and sytem works properly till cycled off again adjusting the air gap would end this problem, T brbettge User May 18, 2008, 9:31 AM Post #3 of 3 (2294 views) Re: Clutch wont kick in Sign In nope, ground is not controlled by ecm. if you are using a test light when you say you have a "dim" ground; then yes, you have a ground problem. there are two wires on the clutch, one "hot" when a/c is signaled to engage the other goes directly to ground. try a jumper lead from the ground side of the compressor connector to a known good ground. Other than that go back to the basics....does the system have enough freon in it to "make" the low pressure switch? Will the compressor turn? you should be able to turn the compressor by hand if it is not locked up. hope this helps, rick   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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