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Need 1981 AC Relay

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Old Dec 13, 2007 | 09:48 AM
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Default Need 1981 AC Relay

Turns out my problem is a bad AC relay - the siver box that mounts on the firewall. Who sell these - i looked in Eklers and Dr. Rebuild, but do not see them. Someone mentioned Autozone in one of the threads, but I can't find the thread. Any help appreciated.
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Old Dec 13, 2007 | 11:15 AM
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like this?
http://www.ecklers.com/product.asp?p...8&dept_id=1168
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Old Dec 13, 2007 | 12:11 PM
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Sixfooter - Thanks very much!!
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Old Dec 13, 2007 | 01:04 PM
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GM discontinue these? They are used in many places besides Corvettes.
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Old Dec 13, 2007 | 07:08 PM
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Interesting - opened up the AC relay and found the little diode was bad. Bought a package of 2 at Radio Shack, soldered one in to replace the bad one, and now the relay works! Ordered a new one to play it safe, but they are repairable!
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Old Dec 17, 2007 | 10:40 AM
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One last question - new problem. With either the repaired relay or the new relay installed, only speeds 2, 3, and Hi work. Lo does not work as default in off position nor does it work as Lo in any of the AC through Defrost positions. It did work the other day. Suggestions?
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Old Dec 17, 2007 | 11:43 AM
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Here is a schematic with some notes on the circuit. Check for 12v on the Brown wire on the resistor pack with the switch on Low. Tan is Medium and Lt Blue is Medium High.
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Old Dec 17, 2007 | 01:09 PM
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Sixfooter - You are fantastic! I checked the Brown wire and it's putting out 12 volts. I looked at the resister pack connector and it looked slightly bent so I straightened it and now all 4 speeds work perfectly and the Lo fan runs in the AC control Off position.
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Old Dec 17, 2007 | 01:16 PM
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Well there ya go, Glad to help
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