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First thing I'd do is measure the voltage to the connector on the monovalve. if it's got 12V AT the connector, then the CCU is working properly, and the problem is definitely in the monovalve. it could be seized in the open position, or the diaphram could be torn.
if there is no voltage at the connector, you must have positive and negative at the connector. don't measure positive at the connector and ground the lead to the motor... the ccu modulates ground to control the flow of heat.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!
My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!
1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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