73 240z gauges not working

[Alan2fast]

I got my car running and the rpm gauge oil and temp gauges dont work no fuses look bad not sure what to look at next thanks

[siteunseen]

Below the oil filter on passengers side is where the oil pressure sending unit is. Make sure that wire is on tight. Your tach could be a lot of different things. Wire at the distributor or coil. Do you have points?

[Alan2fast]

The wire to the sending unit is tight

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[Alan2fast]

Sorry but what do youran by points

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[siteunseen]

My 72s had distributor points originally. Then I upgraded to ZX electronic ignition distributor that had a special way to be wired for the tach to work.

I'm on my phone now so I can't show you the difference, sorry. But under the distributor cap is where mechanical points are. Electronic distributor off a ZX will have a matchbox size black plastic box on the side with wires connected.

I can help better on my laptop in the morning if somebody doesn't beat me to it. We like to help figure out problems.

Cliff

[Alan2fast]

Its a point set up hasnt been changed

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[siteunseen]

That's something you may want to change in the future, it really brought mine alive after I swapped.  Mostly because the points weren't adjusted right, my fault.  Anyway here's a diagram for a '72 you can look over to make sure yours is wired right.  Make sure all the connections are nice and tight especially where they just slide on the ballast resistor.

 

(thanks Blue and zhome.com)

[Alan2fast]

Ever thing looks correct and tight hard to pull off so not sure any chance the gauge could go bad

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[siteunseen]

I've not heard of many tachs going bad. It's usually something before the tach in the ignition. But it could be a bad tachometer?

Many more potentials to consider before replacing the gauge. Hopefully some of the pros will join in.

[Alan2fast]

Yea i haven't really looked to hard times been tight

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[beermanpete]

The tach can fail. Mine failed but it went to full scale all the time rather than doing nothing at all. To verify  the wiring for the tach trigger, disconnect the white connector with four wires in it at the back of the tachometer. The engine should no longer run. If it still runs there is a wiring problem (or you have a 3-wire tach somehow).