i have a short on my oil pressure switch wire on my 97 accord, i connected a voltmeter turned the ignition and wiggled the connector and the voltage dropped to 0v to 12v. i checked it when i replaced my switch because i noticed the indicator flashing. i want to fix this problem and need to know where the wire goes or connects to ty in advance

 

Oil pressure switch is nc to ground so checking just the wire you should show 12v key on. Wire will go to the oil pressure light in the cluster.

 

The oil pressure switch is a normally closed type of switch and is grounded at the engine block where it is attached to. When the switch contacts open, then ground is removed.

The wire does go to the instrument gauge oil pressure indicator; however, the integrated control unit (located in the under-dash fuse box) is part of the oil pressure wire circuit going to the gauge.

If the oil pressure and oil pressure switch is okay; but, you still have a flashing dash indicator, then is may be an intermittent short in the Yel/Rel wire (e.g., wire intermittently touching ground) or an issue with the integrated control unit.

This is how the circuit works:
The low oil pressure indicator light works in two ways: it flashes continuously following a momentary loss of pressure, or it goes on and stays on with a complete loss of engine oil pressure.

When the engine first starts, before its oil pressure rises above 4.3 psi, voltage is applied to the closed and grounded engine oil pressure switch and the light comes on to test the bulb.

With the engine running, voltage is applied at the WHT/BLU wire of the integrated control unit. With normal engine oil pressure, the engine oil pressure switch is open and the low oil pressure indicator light does not come on. If the engine oil pressure switch closes momentarily (more than 0.5 second) but then opens again, the YEL/RED wire at the integrated control unit will sense ground through the switch. The integrated control unit will then provide and remove ground for the low oil pressure indicator light through the YEL/RED wire. The light will flash on and off until you turn the ignition switch off. The flashing feature will not work until 30 seconds after initial voltage is applied to the WHT/BLU wire of the oil pressure indicator flasher circuit. This delay keeps the low oil pressure indicator light from coming on during engine warmup.

If engine oil pressure falls below 4.3 psi and does not increase, the engine oil pressure switch will stay closed. The low oil pressure indicator light will then come on and stay on.

 

I would just go an spend $15 on a new switch. I havent ever heard of one shorting out.

I went through 3 of them within a couple months because they kept failing.