oil pressure switch on 368

1981 CADILLAC DEVILLE
Avatar
COUPEDEVILLN
  • MEMBER
  • 10 POSTS
Engine Performance problem V8 Two Wheel Drive Automatic 90,000 miles

I can't find the oil pressure switch on my 368. Found a sensor on the back of the block, but had only one wire. From my understanding it should have at least 2 and the one from the parts store has 3. Can someone please help? I would really appreciate the help.
Oct 13, 2008 at 7:28 PM
Advertisement
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Avatar
RASMATAZ
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 75,992 POSTS
It only has one male spade terminal on it


https://images.2carpros.com/forum/automotive_pictures/12900_getimage_3.jpg

Oct 13, 2008 at 7:41 PM
Avatar
COUPEDEVILLN
  • MEMBER
  • 10 POSTS
My understanding is that it has 2 circiuts. One for dash light and one 4 the fuel pump. It's supposed to be a back up 4 the fuel pump relay. Is that wrong?
Oct 14, 2008 at 6:23 PM
Advertisement
Avatar
RASMATAZ
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 75,992 POSTS
Not too familiar with your model-Yes there's such thing as fuel pump/oil pressure sending unit-see below how its wired into the system


https://images.2carpros.com/forum/automotive_pictures/12900_oil_sending_unit_and_fuel_pump_circuit_77.gif

Oct 14, 2008 at 6:30 PM
Avatar
COUPEDEVILLN
  • MEMBER
  • 10 POSTS
The parts store got me the right one. Thanks. Now how do I find which relay is the fuel pump relay?
Oct 15, 2008 at 8:53 PM
Advertisement
Avatar
STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,128 POSTS
The fuel pump relay is located on relay panel under instrument panel to the left of the fuse box.
Image (Click to enlarge)
Attached Media
Jan 29, 2018 at 4:40 PM