LT1-LT4 Modifications 1993-97 Gen II Small Block V8

oil sending unit

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Old 03-10-2010, 11:20 AM
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Default oil sending unit

Everysince I have owned my car, the oil pressure guage has been stuck at pegged out. I put it on ramps and saw that the connector on the unit had no wires going to it. Then i found a brown wire hanging by itself that had been stripped out of something. How many wires does the oil sending unit connector have. Thanks.
Old 03-10-2010, 11:32 AM
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The brown wire is possibly the ground wire. Cant remember what the color of the wires for the OSU. From what I know, when the gauge is pegged out, then something is not grounded or one of the wires for it has been pinched or cut.
Old 03-10-2010, 12:00 PM
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yeah, the tip got ripped off. It is supposed to have a tip on it something like the 02 sensors from what I can see. But it looks like it would only take that brown wire like the 02 only have one wire. I'm not sure though because I have seen another one yet. Does anyone have any pics that shows there sending unit with the wires on it? That would help a lot. Thanks.
Old 03-10-2010, 12:13 PM
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The oil pressure sensor is a 1-wire sensor that grounds itself to the block. If it always reads high pressure, then the circuit is open. Reconnecting the tan wire should fix your problem.
Old 03-10-2010, 12:55 PM
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Thanks a lot ramair, I just got to find a way to connect it now since the end was stripped off. Probably have to find an end in the junk yard.



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