1989 AC Compressor Clutch Diode
09-24-2017, 12:11 AM
#1
1989 AC Compressor Clutch Diode
Got a question... My 1989 C4 AC is not working because the Air Conditioning Compressor Clutch Diode got broken. Here's the problem... that part is aparently unobtanium. Nobody makes it. Eckler's has the part for 1990-1996 C4, but it isn't exactly the same, although it sure looks like if I cut both sides and put in the newer part it should work. Does anyone out there who knows these AC systems know if that is correct? FWIW, the Eckler's PN for the newer part is 25-129469-1
09-24-2017, 12:36 AM
#2
I thought the clutch diode is across the two terminals on the coil, band towards (+) side? If it is, the diode has nothing to do with the clutch working or not. It can be broken in two, and the clutch should still work. The diode is for spike suppression when the coil field collapses when the coil turns off.
You can use any diode you want for the suppression. Band towards the Positive side.
You can use any diode you want for the suppression. Band towards the Positive side.
09-24-2017, 03:20 AM
#3
Melting Slicks
Got a question... My 1989 C4 AC is not working because the Air Conditioning Compressor Clutch Diode got broken. Here's the problem... that part is aparently unobtanium. Nobody makes it. Eckler's has the part for 1990-1996 C4, but it isn't exactly the same, although it sure looks like if I cut both sides and put in the newer part it should work. Does anyone out there who knows these AC systems know if that is correct? FWIW, the Eckler's PN for the newer part is 25-129469-1
09-24-2017, 04:25 PM
#4
I need a whole new connector, as I said above the connector is completely smashed. That's the actual problem. I think my diode itself may be fine but the plastic casing is crushed and not usable. I just want to know if the diode and connector that Eckler's sells for 1990-1996 can be retrofitted onto a 1989.
09-24-2017, 04:28 PM
#5
Ahhh. Now I understand.
I looked at an image of the 10PA20 clutch coil. There are two wires. So there are also two wires into the car's harness. Can't you just splice them together, eliminating the OEM connector? And when you do, use any 1 or 2 amp diode. Put the band on the diode towards the Positive side. (In most GM systems, this is a Dk Green wire, but I didn't confirm this from an FSM or observation). Or get any generic 2-pin connector, and splice BOTH sides.
I looked at an image of the 10PA20 clutch coil. There are two wires. So there are also two wires into the car's harness. Can't you just splice them together, eliminating the OEM connector? And when you do, use any 1 or 2 amp diode. Put the band on the diode towards the Positive side. (In most GM systems, this is a Dk Green wire, but I didn't confirm this from an FSM or observation). Or get any generic 2-pin connector, and splice BOTH sides.