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90 f150 A/C clutch - no power

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Old 08-11-2011, 08:41 PM
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Default 90 f150 A/C clutch - no power

OK I know this question has come up several times in the past but I can't find the information I need.

There is no power to the A/C clutch. I've jumpered the low pressure switch with no luck. The big problem is that there is no fuse in the fuse block for the clutch. Also there is no under hood fuse/relay block. Where would the relay or fuse be located? The wires from the A/C clutch go directly into the main harness bundle and then through the firewall.

Any help with locating the relay or other variables I'm overlooking?
Old 08-11-2011, 08:43 PM
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Did you check the controls inside?
Old 08-11-2011, 09:18 PM
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Did you actually check the voltage to the harness that plugs into the clutch?
Old 08-11-2011, 09:31 PM
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I just replaced my A/C clutch last week and your coil could be bad.
Old 08-12-2011, 01:20 AM
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Your AC clutch fuse should be in the inside fuse block. If I remember right #6 20amp fuse second row from the left lowest vertical fuse but don't hold me to that location.Lol
Old 08-12-2011, 11:17 AM
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Originally Posted by dirtcrew51m
Did you actually check the voltage to the harness that plugs into the clutch?
Yes I did. I unplugged the wires and checked with a volt meter. 0 volts. Any other ideas?
Old 08-12-2011, 11:21 AM
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Would a bad coil cause there to be no power to the plug?
Old 08-12-2011, 01:37 PM
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Originally Posted by Just call me Sean
Did you check the controls inside?
Um, what about this?
Old 08-13-2011, 01:31 AM
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Originally Posted by Just call me Sean
Um, what about this?
I did check the controls. Meter showed they were all working.
Old 08-14-2011, 10:16 PM
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bad coil could cause it.



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