Thread: Wires everywhere !!!

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Originally posted by lt1s10
that diagram i sent you dont show the oil sending unite on the block does it?

no, i cant seem to find it, mabey its shows it on the instrument diagram.

Originally posted by 53 Chevy5
no, i cant seem to find it, mabey its shows it on the instrument diagram.

thats only computer related so the oil switch wont show it show the fuel pump because its part of the computer . ill get the gauge diagram tomorrow.

Originally posted by Big Daddy T
I would greatly appreciate it 10 the one in chilton book is screwy. I have installed car sterios for about 15 years .Wires dont scar me but computer wiring is a mess...

ok big daddy on a 1990 chev. pick-up with a 350 there is only one oil pressure switch. thats the 3 prong one on the side of the block. 2 of the wires goes to the fuel pump and one to the gauge in the dash. so if you have a plug for the one on the side of the block thats all you need. i dont have a diagram yet but if you have the 3 prong plug thats all you need.

Originally posted by lt1s10
ok big daddy on a 1990 chev. pick-up with a 350 there is only one oil pressure switch. thats the 3 prong one on the side of the block. 2 of the wires goes to the fuel pump and one to the gauge in the dash. so if you have a plug for the one on the side of the block thats all you need. i dont have a diagram yet but if you have the 3 prong plug thats all you need.

now i have a diagram but the print is so small i cant blow it up so you can see it, we'll try this.

only 1 oil pressure switch on the block.
3 wire plug goes to it.
you should have a
1-GRN wire
1-TAN/WHT wire
1- TAN wire
the GRN should be 12 volts.
the TAN/wht goes to the computer ,so dont hook them togother
the TAN wire goes to the oil pressure gauge in the dash

you dont need for the 2 fuel pump wires to be hooked up to make it run. the pump should be running off of the reg. relay or its been by-passed anyway.

find the TAN wire and plug it on the top post on the switch and see if it works, or ground out the tan wire and see if it makes the gauge move in the dash. if it does then you know you'er right.

Originally posted by DennyW
Mike, that Tan wire is the one he said he couldn't find. Where does that Tan wire hokk to from end to end? Oh, never mind. It goes from the dash gauge to the oil sender, and that acts as the resistor to ground to vary the voltage .

if he cant find that tan wire he needs to run a wire from the oil pressure switch on the motor to the tan wire in the plug at the back of the instrument panel. the ground will take care of it self. it will use the same ground thats it useing now. thats what id do before i spent a lot more time looking.