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Toyota a/c amp board

mldave on Sat May 14, 2011 7:02 PM User is offlineView users profile

Year: 1986
Make: Toyota
Model: truck
Engine Size: 2.4
Refrigerant Type: 134
Ambient Temp: unknown
Pressure Low: unknown
Pressure High: ???
Country of Origin: United States

On my 86 Toyota truck 22RE 2.4 EFI 5 speed 4x4,A/C was added to the truck,perhaps with different wiring parts?Anyhow everything is charged up but the a/c amp board was bad,so it was replaced with the same number used board 077100-0610.Still no juice comes out the end to turn the compressor on.Juice from the a/c button to the a/c amp board is good.My mechanic put a jumper wire on the amp board prongs and the compressor kicks on,what's up?He said he can bypass it all with a toggle switch,is this a good idea and what are the step by step procedures to do the bypass,thanks.

NickD on Sun May 15, 2011 9:10 AM User is offline

Inputs as I recall are anything but off with the blower switch, the dual function high pressure switch, and the evaporator temperature sensor switch, either a thermistor or a capillary tube switch, feel its the latter, and the AC on-off switch. Some of these cars had a compressor speed detector that compared the compressor speed with the crankshaft speed, if different, no output. Recall one back then where the AC switch was bad, would give a closed contact when on.

Amplifier is like a big "AND" gate, all inputs must be present before the single clutch relay would output. Should check those first. While a toggle switch would work, have to be awake and constantly open and close it. If say you get a bug in your condenser and the dual function switch is bypassed, could blow up your system. Really can't recommend that. Or your evaporator will freeze up causing damage to it, can't recommend that either.

mldave on Sun May 15, 2011 1:10 PM User is offlineView users profile

Thanks for your reply....

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