C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

AC electrical problem

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Old Oct 6, 2007 | 06:21 PM
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93cruiser
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From: Guntersville Alabama
Default AC electrical problem

I need help on a AC electrical problem. Below are things that I know.
System is fully charged.
Electronic AC temp control functions normally.
AC clutch relay works
AC clutch checks good( no open circuit)

The problem begin as intermittent, now the clutch is not recieving power.

Any help will be appreciated.
93cruiser
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Old Oct 6, 2007 | 07:26 PM
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From: Cincinnati, Oh USA
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Check the 25 amp A/C fuse in the fuse block by the passenger door. Also check the fuse clips for bright, tight. Check for fully seated clutch connector. Check the blower control module ground connection to the frame on the RH side of the engine compartment (black wire from the blower control module). Make sure there are no codes set in the diagnostic mode on your a/c controller. You can jump the green wire out of the clutch to ground and the clutch should be heard to close.
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Old Oct 6, 2007 | 08:12 PM
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93cruiser
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From: Guntersville Alabama
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Need help. I am using a 93 fsm to diagnose my AC problem on a 94. Need to know what pin #'s to check on the red connector of the ecm to test whether my pressure switch is good or bad. The 93 fsm says to check between 21 and B+ for continuity. Thanks for any assistance.
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