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

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Old May 4, 2008 | 10:19 PM
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Default another ac question

the compressor has a power plug to the clutch, when plugged in it blows the 25 amp fuse for the system, checked out every thing else and this is what blows the fuse. the compressor and clutch are only about 2 years old, but when i pull up on the wires that go into the clutch there is a jingle there? what gives? why is it blowing the fuse?
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Old May 4, 2008 | 10:27 PM
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First thing I'm thinkin' is seized compressor.

Jump power from the connector, TO the 12V input on the comp. That alone should not fry a fuse. Then gound the comp (-) pin to the frame.

That test will by-pass the freon pressure cut-out switch tho', don't hold it longer than is necessary to confirm a free comp.
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Old May 4, 2008 | 10:28 PM
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sounds like you may have a short. Put an ohm-meter on it and tug while checking. 25A is alot of current, so I am guessing hard short from power to ground.

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Old May 4, 2008 | 10:37 PM
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Default short?

i think so too, the compressor turns for a few seconds before blowing the fuse, is there supposed to be a clinking sound and movement of somthing to those wires behind the clutch?
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Old May 4, 2008 | 10:49 PM
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Originally Posted by mphy98
iis there supposed to be a clinking sound and movement of somthing to those wires behind the clutch?


Whatcha' mean here?
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Old May 4, 2008 | 10:54 PM
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Originally Posted by mphy98
i think so too, the compressor turns for a few seconds before blowing the fuse, is there supposed to be a clinking sound and movement of somthing to those wires behind the clutch?
The 2 male leads that are located behind the clutch should have no play or "jingle" at all. An ohmeter will tell you right away if you are shorting the 12v lead to ground inside the casing. If this is NOT the case, someone else mentioned a seized compressor, which would also frag a 25A fuse....In this case, the clutch engages, trys to rotate a seized compressor, draws more and more current to try to turn it...and poof, the clutch draws in excess of 25A.

Usually with a seized compressor, you can smell the clutch burning....just a nasty smell...

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Old May 5, 2008 | 09:13 AM
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Default ac

thanks guys, it is something in the clutch thats shorted out, the wires have major movement and an ohmeter confirms direct short, thanks again. bob
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