Quote:
Originally Posted by the.phantom
should ! hi speed depends on just switch contacts to get 12 volts
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While it is correct that the Hi (max) speed setting will continue to function with a faulty resistor pack, the 'max' setting supply voltage does not run thru the switch.
Most blower motor full speed amperage draws are too high to run directly thru a switch safely & therefor are routed thru a relay, with the switch hi-fan position simply activating the relay.
No offense intended here, just didn't want folks to misunderstand how it works.