I pulled the connector loose from the top of the thermostat housing above the water pump, I think that is what you said to do. When I disconnected the single lead wire, the temp gauge on the dash went to "0" When I pulled the 4 prong plug, nothing happened. I guess this tells me there is something wrong with the relay. I also checked the pressure in my AC system, it is corect, but just hair low. The compressor kicks on and stays on, but the fans do not engage. I understand the relay is behind the fuse panel, which relay is it on the 129 chasis car? Any help is appreciated! Thanks,
Brian

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Brian W. Heitman

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