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Old 07-24-2015   #1
Coupe89
 
Join Date: Aug 2009
Location: Livermore, Ca
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Default Diode Air Conditioning Clutch

Does anyone know what type of diode to use on the AC clutch coil?

I have 1N4004 diode but I think that for an 89.
Anything for LT5?

If not I'll give 1N4004a shot.
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Old 07-24-2015   #2
-=Jeff=-
 
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Default Re: Diode Air Conditioning Clutch

Quote:
Originally Posted by Coupe89 View Post
Does anyone know what type of diode to use on the AC clutch coil?

I have 1N4004 diode but I think that for an 89.
Anything for LT5?

If not I'll give 1N4004a shot.
That should work as well for the LT5.. compressors and clutches are basically the same, LT5 compressor volume is smaller but i would not think that would be an issue
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Old 07-24-2015   #3
batchman
 
Join Date: Jun 2009
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Default Re: Diode Air Conditioning Clutch

A diode across a coil is there to absorb a surge when the magnetics release. It's not like it's a constant current thing. That diode should be fine.

GL,
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Old 07-24-2015   #4
John Boothby
 
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Default Re: Diode Air Conditioning Clutch

LT5 clutch is different than the standard. It is unique due to the higher RPM I believe.

When I bought my Z, the belt was shredded. I put a new belt on and within a week, it was shredded also. I looked through all the receipts that came with the car, and found where the a/c clutch had been replaced. I referenced the pn and it was for the LT1. I showed this to the dealer, and he replaced the clutch with the correct one for free, even though it was the previous owner who had it replaced.
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Old 07-24-2015   #5
WVZR-1
 
Join Date: Oct 2004
Posts: 1,884
Default Re: Diode Air Conditioning Clutch

Quote:
Originally Posted by Coupe89 View Post
Does anyone know what type of diode to use on the AC clutch coil?

I have 1N4004 diode but I think that for an 89.
Anything for LT5?

If not I'll give 1N4004a shot.

I've seen this TSB by FourSeasons regarding the diode you mention but the TSB references the RS part number for that diode part #. RS # 276-1103 is their number for the # you referenced. Does it mean squat? Don't know.

http://www.4s.com/Upload/Four%20Seas...STALLATION.PDF

The GM TSB regarding all diodes:

http://www.corvetteactioncenter.com/...print-217.html

Last edited by WVZR-1; 07-24-2015 at 11:38 PM.
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Old 07-25-2015   #6
Coupe89
 
Join Date: Aug 2009
Location: Livermore, Ca
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Default Re: Diode Air Conditioning Clutch

Thanks for the info...
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