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Reply to "Oil Temperature Sender"

@Marshall posted:

Both photos are of the same sender.  

With the key on, I took the top wire off and grounded it to the fan housing. The oil temperature gauge pegged out. B

Because there are two wires here, is this sender fulfilling more than one function? Is this one part or multiple parts?  

 

Marshall,

Your photo appears to show two senders on a tee. Since the top one is for the temperature gauge, the bottom is most likely for the oil pressure light. With the key on but the engine not running, the oil light should be on. Disconnect the bottom wire, the oil light should go out. 

Do you have an multimeter? If so, measure the resistance in ohms between the top sender's lug and sender body, with the engine cold the wire disconnected. Go take a nice long drive, then measure the resistance again with the engine hot. Report the values and we'll have some idea if the sender is working. Also check the resistance between the sender body and the engine block itself. It should be a couple of ohms at most. If it's high or open the sender isn't grounded, this could cause the gauge to read low all the time.   

Eric

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