Instrument cluster grounds?

[SLC97SR5]

My factory oil psi gauge has started to flick around and pulse with the vibration of the engine.

I have replaced the oil psi sender and cleaned up the pig tail connector. I think a ground is at fault.

I polished up the frame to cab ground strap on the passenger side as well as the EEC test connector ground and the 2 grounds under the hood near the passenger head light.

Where are the grounds for the gauge cluster?

Thanks!

 

[79jasper]

Get a real gauge. Only true way to fix it. The factory one is a dummy gauge. It comes up at 7 psi and that's it.

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[SLC97SR5]

I'm aware that they are not true reading gauges but the pulsing irritates me.

 

[cpdenton]

Grounds are located behind the drivers side kick panel. Also, might need to clean the contacts on the rear of the instruments themselves.

 

[SLC97SR5]

Awesome, thanks!

 

[ifrythings]

Don't forget to check the main engine plug on the lower drivers side of the engine, it's not a sealed plug and can be causing your issue.

 

[FarmerFrank]

The push-in pins gets loose and worn on the back of the gauges to the instrument cluster from vibrations. I had an 88' do the same thing and turned out to be them. If you know what I'm talking about