84-85 Trucks & 4Runners 2nd gen pickups and 1st gen 4Runners with solid front axles

Ac not working. light comes on, but no commpresser engagement

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Old Mar 19, 2010 | 06:38 PM
  #1  
paranoid56's Avatar
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From: San Diego, CA
Ac not working. light comes on, but no commpresser engagement

So wasMessing with the AC, the light commMes on, but the clutch never engages. when i put a wire froM the AC clutch to the battery it engages and i get nice cold air.

any ideas?
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Old Mar 19, 2010 | 07:23 PM
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There is a presure switch in the a/c system, and if the freon level gets to low the a/c won`t come on. It could be other things as well, but low freon is the most common thing that ive seen.
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Old Mar 19, 2010 | 08:46 PM
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I checked the PSI on it with a recharge kit and was "with in" spec. from what that gauge said. will have to check that switch. any idea where its at?
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Old Mar 19, 2010 | 09:28 PM
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If i remember right, its in the a/c box under the dash, but the wiring comes out of the a/c box so you should be able to test it that way.
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