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A/C Compresser won't come on ...... Not Fuse ..... Not Relay .... Not LPS .... What? 850 1994

posted by  dan52 on  Wed Jul 9 13:52 CST 2003
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I can't get the AC compressor clutch to engage. Thought it was low on freon, which it probably is, so I jumpered around the Low Pressure Switch. No help. Checked for voltage at both terminals of Cable Connector to LPS ----- NO +12V on either terminal.

AC Compressor Fuse is good.

Removed the AC relay --- 500 Ohms measured between terminals 85 and 86, but no "click" when +12 V applied across terminal 86(+) and terminal 85(-). Probably bad.

Terminal 30 of A/C relay socket has +12V when A/C switch is on. Terminal 86 of A/C relay socket has +12 V when AC switch is on and fan switch is on.

I put a jumper between terminal 30 and terminal 87 of A/C relay socket. Still no +12V at either terminal of Cable Connector to LPS. I thought one contact in the LPS Cable Connector was directly connected to terminal 87 of the A/C relay socket.

What do I check next? I hope to get the A/C compresser running so I can find out that I need a new $1200.00 evaporator.

TIA
Dan






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New A/C Compresser won't come on ...... Not Fuse ..... Not Relay .... Not LPS .... What? [850][1994]
posted by  dan52  on Wed Jul 9 13:52 CST 2003 >


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