heater electrical problems

the fan switch on my 72 only runs on one speed. is this a switch problem or a relay problem or both another question. what does the resistor do and could it cause a
problem. thx in avance
jeorme
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If the one speed is high, the resistor is the likely place to start.
Al
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thx but the switch works on the 2nd speed i think. i wonder if the dealer has that part thx again
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If problem were only on High it would be relay, on medium it is more likely the resistor.
PDeen
On Nov 8, 5:32 am, snipped-for-privacy@webtv.net (JCORVETTE 72&75) wrote:

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