Odd guage problem.

[1oldmotorguy]

Brought engine up to temperature, and shut it off. Turned ignition back to the 'on' position (running position) and observed the needles for temperature and fuel pulsating up and down in time for each other (without engine running).

I can't hear any relays clicking on this, but can't figure out why they'd be pulsating off battery voltage without the engine running (or why the oil pressure gauge would be reading anything without the engine running).

They do appear to have the incorrect oil gauge wired in (two-wire gauge) on the oil pressure sensor.

In addition, the fuel level gauge turns on, then after about 5 seconds I hear a relay click on the passenger side of the car, and then goes dead. Additional attempts at turning the car on or off may or may not cause the gauge to reset, however it shuts off each time with that same click.

The previous owner hacked apart the wiring harness to add a stereo. I'm trying to find where a relay could have been placed in... and getting out a soldering gun to replace all the crimp connectors. They can't be helping matters.

Any ideas or suggestions where to look?

I must be more tired than I thought. This is on a 1977 280z 2+2.

Edited April 15, 2009 by 1oldmotorguy
My own stupidity. *hehs*