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Re: temperature gauge question
The sending unit commonly goes bad at the engine.
> What are possible causes for intermittent operation of the temperature
> gauge on an '89 100? Following the Bentley procedure, I have checked
> the resistance of both sensors on the upper cooling hose ( ~3.3k ohms at
> 50 deg F and ~230-250 ohms when hot) and the voltage on the connecting
> harness (4.95V on one terminal and 4.75V on the other).
> 3.3k ohms is above the spec. in the manual, but the resistance does seem
> to change properly versus temperature. Is there something in the gauge
> unit itself (I don't look forward to the idea of dash disassembly) that
> typically fails? It appears aggravated at cold temperature. Thanks for
> Adam Dixon
> '89 100 130k