Join Date: May 2014
Location: San Andreas Fault Zone
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Re: Another 4WD not working question - please help
Assuming that you have a good quality multimeter that can resolve .10 ohm, and that you can "zero-out" probe resistance, anything more than .5 ohm when the switch is "closed" probably indicates some degradation of the contacts (contamination, tarnish, etc.) within the switch.
On the other end of the scale, 10K ohms when the switch is "open" probably indicates some degradation of the switch seal, with some moisture inside.