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Home >> Mercedes Benz >> 1973 >> 280 >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> MERCEDES-BENZ 280 & 280C Engine Modification >> Testing >> Checking Oil Temperature Switch
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Checking Oil Temperature Switch

Disconnect plug of 12 prong relay box and connect voltmeter to terminals 5 and 8. Voltmeter should indicate zero volts with oil temperature above 62°F.

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