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Need the colors for the oil pressure switch at the

Need the colors for the wires at the oil pressure switch at the block my plug got ripped of the switch and i dont know witch of the 3 wires goes were there is a white a green and a red with black stripe.the car is a 1987 buick grand national

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The wiring diagram shows it to be TAN. ???

Posted on Nov 17, 2009


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How to replece oil pressure switch

Thread the new switch into the block by hand and then tighten the switch securely with the the oil pressure switch socket. Connect the electrical wire to the new oil pressure switch. Start the vehicle and check for oil leaks at the oil pressure switch. Verify the operation of the oil pressure gauge.

Jun 16, 2015 | Cars & Trucks

2 Answers

94 Chevy C3500 5.7L oil pressure sw on right side of block in the middle that has only 1 wire. It does not run the oil gauge as it still works when unplugged.

Take the sensor to oriely's ,or autozone and have them match the sensor those trucks have two oil sensors or switches as most people call them the one behind the intake at the back of the engine is your oil gauge the other is the computer switch for other purposes like for the fuel pump or etc
Purpose: As a back-up system to the fuel pump relay, the fuel pump is also turned ON by the oil pressure switch. Operation: When the engine oil pressure reaches about 28 kPa (4 psi), through cranking the oil pressure switch will close to complete the circuit to the fuel pump.

25636349-twokmmoxmconkg43teug4wwl-5-0.jpg The one you need that is behind the exhaust is a oil pressure sensor .
the one up behind intake is a oil pressure switch

Apr 09, 2015 | 1994 Chevrolet C3500

2 Answers

Cadillac Escalade oil pressure guage stays on highest point

Make sure oil is at full level....Oil sending unit/solenoid is at fault..At times wiring connector attached to unit will become only loose....But rare..

Feb 19, 2015 | Cadillac Cars & Trucks

1 Answer

Where is the oil pressure switch located at on a 96 jimmy 4.3 v6

you will see three wires leading to that switch on the side of the engine block. This switch has a black colored top to it where the plug in fits into

Oct 02, 2011 | 1996 GMC Jimmy

1 Answer

2003 chevy avalanche, oil pressure gauge is all the way up to highlevel. what to do?

Locate oil pressure sending switch on side of engine block(small black switch with one wire plugged onto it )kinda looks like a big spark plug.Unplug clean contact and plug back in.If gauge still not working need to replace switch.

Feb 16, 2011 | Chevrolet Avalanche Cars & Trucks

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Where is the oil pressure switch located on the engine of a 2007 EOS turbo 2 liter?

Welcome to


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Jan 10, 2011 | 2008 Volkswagen Eos

1 Answer

Where do I find a diagram to change the power steering pressure line hose in my 1990 Lincoln Continental?


  1. Disconnect negative battery cable.
  2. Remove sight shield.
  3. Remove module bracket.
  4. Disconnect No. 6 spark plug wire to prevent damage to wire.
  5. Remove radiator fan shroud assembly.
  6. Remove top RH isolated radiator mount bracket.
  7. Remove remote air cleaner.
  8. Remove ignition coil.
  9. Disconnect electrical connector on power steering pressure switch at steering gear.
  10. Remove pressure switch to allow for tool clearance.
  11. Remove screw at pressure switch and return line bracket.
  12. Remove anti rattle clips from power steering lines.
  13. Remove plastic strap attaching steering gear heat shield to power steering return line.
  14. Remove plastic strap attaching lines to transfer tube on the steering gear.
  15. Disconnect Electronic Vacuum Regulator (EVR) valve wire.
  16. Remove the ground wire from back of engine block.
  17. Remove pressure line fitting at power steering pump using a 5/8 inch flare nut wrench.
  18. Loosen clamp and remove return line at pump.
  19. Loosen clamps and remove return line at power steering oil cooler.
  20. Remove pressure line fitting (gold in color) at steering gear, using an 18mm open end wrench.
  21. Remove return line fitting (silver in color) at steering gear, using an 18mm open end wrench.
  22. Loosen two screws retaining power steering oil cooler to sub frame.

Oct 21, 2010 | 1990 Lincoln Continental

5 Answers

Oil light flickers on at idle and when stopping. Oil level is correct. Engine temp OK. Changed the oil to 10 w 40 but light still flickers.

before replacing the oil pump, try replacing the oil filter with one from mazda. there really is a difference in oil filters. if this doesnt cure the issue, youre going to need to replace the oil pump.

Jan 19, 2010 | 1988 Mazda B2200

1 Answer

I have a Honda 2004 CRV - the repair ( OBD II) code is P2647 - what does that mean?

P2647 VTEC Oil Pressure Switch Circuit High Voltage - With Automatic Transmission Basicallly the sensor has gone bad or an oil passage has become blocked.

**. Locate the Variable Timing Electronic Control (VTEC) pressure switch on the end of the cylinder head. Honda has had problems with the VTEC oil pressure switch, there is an updated part number for the vehicle (37250-PNE-G01). On this vehicle the VTEC oil pressure switch can fail at any RPM.
2. The VTEC oil switch is normally closed, and grounds the reference voltage from the Engine Control Module (ECM) on the Blue/Black (BLU/BLK) wire. If the code sets at idle - 2500 RPM - and the Brown/Yellow wire has a good ground, then suspect a faulty VTEC oil pressure switch.
3. At approximately 2500-4000 RPM and when driving the vehicle, the VTEC system should turn on. To turn on the system, the ECM energizes the VTEC Solenoid valve and it allows oil pressure into the intake valve rocker arms, the oil pressure opens the VTEC oil pressure switch so the Engine Control Module (ECM) can verify that the VTEC did turn on correctly.
4. The code will set at idle to 2500 RPM if the reference voltage is not grounded. The code will set above 2500-4000 RPM if the VTEC oil switch does not open.
5. If the code sets at 2500-4000 RPM or higher, the problem can be a low oil level or pressure, or a malfunction in the VTEC assembly.
Potential Causes: Low Engine Oil
Plugged Oil Passage
Insufficient Oil Pressure
Plugged Oil Screen
Insufficient Oil Volume
Malfunctioning VTEC Oil Pressure Switch
Defective VTEC Solenoid

Jul 13, 2009 | 2004 Honda CR-V

3 Answers

Oil pressure problem

You oil pressure sending unit has gone bad, it's common to go bad and some even leak oil. 
The oil pressure sensor is on the back of the block on the passenger side, you can get to it from the top and not from the bottom. There are (2) switches back there that screw in to the block and you can only see it from the top of the engine. The Oil Pressure Sending Unit is the one wire harness with a green and white strip on it. The other switch has more wires to it. 
When you pick up the new sensor, make sure you get the right one. make sure you get the Oil Pressure Sending Unit which sends variable oil pressure and has only one quick connect for the wire connector. The oil pressure switch is the one that only activates the oil light on older engine
Once you get the right part at Auto Zone for around $9.00, disconnect the wire clip with the green with white strip on it. and use a deep spark plug socket with a extension and u joint to get the sensor out. The sensor comes with teflon tape already and no oil should leak out from the block. It as simple as replacing a bolt and reconnecting the wire connector. 
Good luck and hope this helps, take no more then 10 min to do but about 5 hours for the engine to cool off LOL

May 29, 2009 | 2000 Ford Ranger SuperCab

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