Working on my 1990 gmc jimmy. I am trying to find the replacement parts for my fuel pump relay and oil pressure switch (Single terminal between 2 & 4 spark plugs). I found oreilly's carries the fuel pump relay but I cannot find the 1 terminal oil pressor sensor. Does anyone have the ac delco part numbers? Was trying to use them over the oreilly in house. On RockAuto they only show the wells relay and no single terminal oil pressure sensor either just the 3 pin
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
fuel pump relay & oil pressor sensor part numbers
- Thread starter chappys4life
- Start date
If it were me anymore I'd leave that switch off/not-working.
It's a backup if your fuel pump relay fails. You can jumper the relay terminals to power the fuel pump or run a wire directly to the red wire dangling off the fuel pump relay for that purpose if the relay fails. It's actually a very stupid design.
I've had two "new" fuel pressure sender/switches fail and left the pump running with the key off. I'm far more worried about a dead battery than I am having to bypass the relay. A spare relay would be easy to carry if it was that concerning, but it's not, since a good length of wire is infinitely more likely to be useful for multiple issues.
Not sure about the later trucks, but on the '88+ body style, the relay for the AC was the same as the fuel pump relay, so you already had a spare.
It's a backup if your fuel pump relay fails. You can jumper the relay terminals to power the fuel pump or run a wire directly to the red wire dangling off the fuel pump relay for that purpose if the relay fails. It's actually a very stupid design.
I've had two "new" fuel pressure sender/switches fail and left the pump running with the key off. I'm far more worried about a dead battery than I am having to bypass the relay. A spare relay would be easy to carry if it was that concerning, but it's not, since a good length of wire is infinitely more likely to be useful for multiple issues.
Not sure about the later trucks, but on the '88+ body style, the relay for the AC was the same as the fuel pump relay, so you already had a spare.
