1990 3.1 oil sending unit location

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Jul 6, 2011 | 04:22 PM

RandyPozdnikoff

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Junior Member

Joined: Feb 2011

Posts: 10

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From: Okanagan Valley,BC

Car: 1990 RS

Engine: currently a 350sbc soon to be 421sb

Transmission: 700r4

Axle/Gears: 3.23

1990 3.1 oil sending unit location

Hi, I need help finding wiring harness for oil pressure sending unit. manual shows nothing ! I have swapped out 3.1 for a carbed 350 and have lost track of harness . can someone tell me what the wire colors are or where it might be in old harness? please !thanks guys.

Jul 6, 2011 | 07:01 PM

camaronewbie

Supreme Member

Joined: Sep 2002

Posts: 9,192

Likes: 19

From: Cary, North Carolina

Car: 1992 RS

Engine: Carbed 350

Transmission: 700R4

Axle/Gears: 3.42 posi

Re: 1990 3.1 oil sending unit location

All I know is V8 cars - but on them the OPSU was above oil filter. The wire colors you seek are grey and orange. If the OPSU is like the V8 car, it will have 3 wire connector, grey (to fuel pump), orange (from fuse located behind the battery at fenderwell), and black (runs to oil pressure guage).