Alan2fast Posted September 10, 2015 Share #1 Posted September 10, 2015 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 Link to comment https://www.classiczcars.com/topic/52346-73-240z-gauges-not-working/ Share on other sites More sharing options...
siteunseen Posted September 10, 2015 Share #2 Posted September 10, 2015 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? Link to comment https://www.classiczcars.com/topic/52346-73-240z-gauges-not-working/#findComment-477343 Share on other sites More sharing options...
Alan2fast Posted September 10, 2015 Author Share #3 Posted September 10, 2015 The wire to the sending unit is tightSent from my SM-N900T using Tapatalk Link to comment https://www.classiczcars.com/topic/52346-73-240z-gauges-not-working/#findComment-477345 Share on other sites More sharing options...
Alan2fast Posted September 10, 2015 Author Share #4 Posted September 10, 2015 Sorry but what do youran by pointsSent from my SM-N900T using Tapatalk Link to comment https://www.classiczcars.com/topic/52346-73-240z-gauges-not-working/#findComment-477346 Share on other sites More sharing options...
siteunseen Posted September 11, 2015 Share #5 Posted September 11, 2015 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 Link to comment https://www.classiczcars.com/topic/52346-73-240z-gauges-not-working/#findComment-477348 Share on other sites More sharing options...
Alan2fast Posted September 11, 2015 Author Share #6 Posted September 11, 2015 Its a point set up hasnt been changedSent from my SM-N900T using Tapatalk Link to comment https://www.classiczcars.com/topic/52346-73-240z-gauges-not-working/#findComment-477349 Share on other sites More sharing options...
siteunseen Posted September 11, 2015 Share #7 Posted September 11, 2015 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) Link to comment https://www.classiczcars.com/topic/52346-73-240z-gauges-not-working/#findComment-477357 Share on other sites More sharing options...
Alan2fast Posted September 13, 2015 Author Share #8 Posted September 13, 2015 Ever thing looks correct and tight hard to pull off so not sure any chance the gauge could go badSent from my SM-N900T using Tapatalk Link to comment https://www.classiczcars.com/topic/52346-73-240z-gauges-not-working/#findComment-477480 Share on other sites More sharing options...
siteunseen Posted September 13, 2015 Share #9 Posted September 13, 2015 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. Link to comment https://www.classiczcars.com/topic/52346-73-240z-gauges-not-working/#findComment-477481 Share on other sites More sharing options...
Alan2fast Posted September 13, 2015 Author Share #10 Posted September 13, 2015 Yea i haven't really looked to hard times been tight Sent from my SM-N900T using Tapatalk Link to comment https://www.classiczcars.com/topic/52346-73-240z-gauges-not-working/#findComment-477482 Share on other sites More sharing options...
beermanpete Posted September 14, 2015 Share #11 Posted September 14, 2015 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). Link to comment https://www.classiczcars.com/topic/52346-73-240z-gauges-not-working/#findComment-477509 Share on other sites More sharing options...
Yarb
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