A/C compressor clutch
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A/C compressor clutch
[font size="1" color="#FF0000"]LAST EDITED ON 14-Jul-00 AT 05:30 PM (EST)[/font][p]Hi folks,
'78 F250 4x4 with a 400 cid motor.
How much current should a healthy
clutch draw while engaged?
Joe O'Neill
hanabi@lvcm.com
'78 F250 4x4 with a 400 cid motor.
How much current should a healthy
clutch draw while engaged?
Joe O'Neill
hanabi@lvcm.com
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Joined: Feb 2000
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From: Wichita USA
A/C compressor clutch
I haven't used amps to trouble shoot problems with clutch circuits but I do use volts. You should be seeing battery/charging volts at the power feed wire with system running. You didn't say what your problem was but if voltages are ok and pressure readings on both high and low sides are within specs. and clutch is slipping I would suspect a bad magnet. Air gap also plays a part in this.
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A/C compressor clutch
The vehicle I'm working on was purchased recently
and the air has been unused for the past decade.
The compressor has been removed for about the same amount of time. Upon inspection it was noted that the wire to the clutch was burned almost to the firewall and the switch behind the climate control panel was also fried. I've replaced the panel switch and now I'm trying to determine why it burned. A schematic I have shows a relay between clutch and firewall but I don't have one.
Joe
and the air has been unused for the past decade.
The compressor has been removed for about the same amount of time. Upon inspection it was noted that the wire to the clutch was burned almost to the firewall and the switch behind the climate control panel was also fried. I've replaced the panel switch and now I'm trying to determine why it burned. A schematic I have shows a relay between clutch and firewall but I don't have one.
Joe
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Joined: Feb 2000
Posts: 1,100
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From: Wichita USA
A/C compressor clutch
I see. I'm not sure about the burned wire in the engine compartment. Sounds like a bare spot found a place to ground. As for melted area on switch I have seen a lot of these on Fords and Chevys. It seems to be a common enough problem that wiring harness repair kits are available. Replacing the switch and the melted harness has been the action to take. So far in at least 15 years I haven't had to fix the same problem on the same car again.
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