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Troubleshoot Electrical System Test Light

A test light checks for a pulsing signal from the voltage regulator. If you get the pulse, the sending unit-in this case, for oil pressure-is probably bad.
How To Troubleshoot Your Electrical System

 A test light checks for a pulsing signal from the voltage regulator. If you get the pulse, the sending unit-in this case, for oil pressure-is probably bad.  View Related Article

 

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