Quote:
Originally Posted by ronlindsey1
Hey there MT-2500. After checking the wiring diagram for my 2004 Buick Lesabre in my Haynes manual I decided to read the section on Fuel systems. My oil pressure sending unit has 3 terminals ( I think it contains the oil pressure switch). In the notes section it says "If oil pressure drops below the specified pressure level, the oil pressure switch will act as a fuel fuel pressure cut-off device. " pretty interesting and more than meets the eye. Thanks.
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I hate to tell you but Your Haynes manual is full of crap.
Every Haynes manuals I have saw will lie to you.
They are a One book fit all like trying to putting socks on a Banty Roaster.
On a 04 Buick LeSabre the oil pressure 3 wires
One is black ground and gray is a 5 volt reference signal and the Tan/white is the oil pressure signal to PCM.
Not even close to a oil pressure safety or cut off switch.