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

89 A/C compressor (oe) clutch - diode in the harness- where?

Thread Tools
 
Search this Thread
 
Old 02-27-2011, 08:48 AM
  #1  
corvette95
Melting Slicks
Thread Starter
 
corvette95's Avatar
 
Member Since: Jul 1999
Location: Decatur, Alabama
Posts: 3,212
Received 97 Likes on 83 Posts

Default 89 A/C compressor (oe) clutch - diode in the harness- where?

Can someone explain to me the purpose of the diode in the harness going into the a/c compressor? I have searched and can't find it in my harness. I think my clutch has gone out but want to check this diode that I read about but haven't had to do this before. Thanks!
( 89 OE compressor)
Thanks in advance!
Old 02-27-2011, 01:32 PM
  #2  
SunCr
Le Mans Master
 
SunCr's Avatar
 
Member Since: Dec 2000
Location: San Diego, Ca
Posts: 7,839
Likes: 0
Received 19 Likes on 17 Posts

Default

In the Compressor Coil Connector under a rectanglar piece of black plastic.

The diode is a one way device so that juice can only flow to ground. Without it, the collapsing magnetic field - when the clutch disengages - can allow juice to flow back and short out the Coil. Test it with a DVM as positioned in the clip. Closed circuit toward ground; open the other way.
Old 02-28-2011, 07:33 AM
  #3  
corvette95
Melting Slicks
Thread Starter
 
corvette95's Avatar
 
Member Since: Jul 1999
Location: Decatur, Alabama
Posts: 3,212
Received 97 Likes on 83 Posts

Default

Originally Posted by SunCr
In the Compressor Coil Connector under a rectanglar piece of black plastic.

The diode is a one way device so that juice can only flow to ground. Without it, the collapsing magnetic field - when the clutch disengages - can allow juice to flow back and short out the Coil. Test it with a DVM as positioned in the clip. Closed circuit toward ground; open the other way.
Thanks! Should I get 12 volts after diode with a/c request on?
Old 02-28-2011, 02:48 PM
  #4  
SunCr
Le Mans Master
 
SunCr's Avatar
 
Member Since: Dec 2000
Location: San Diego, Ca
Posts: 7,839
Likes: 0
Received 19 Likes on 17 Posts

Default

Depends - State of charge? Manual or Electronic Air? What are you trying to figure out?

Get notified of new replies

To 89 A/C compressor (oe) clutch - diode in the harness- where?




Quick Reply: 89 A/C compressor (oe) clutch - diode in the harness- where?



All times are GMT -4. The time now is 08:02 AM.