speedometer does not works odometer kinda does

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
Lunzee
Posts: 26
Joined: Thu Dec 29, 2011 10:52 pm
Car: 1990 300zx na 2 seater
Location: Willow Springs, California

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So I need help quickly, my speedometer does not work, neither did my trio odometer. So I figured bad pinion sppedometer gear or cluster, replaced the pinion speedometer heat to no avail. But I've noticed some lights in my cluster turn on or off if I tap my cluster. And I reset my trip odometer and drove 250 miles without paying any attention to it and it went up to 99.8 miles sometime during.g my trip.could it be a loose wire to the back of the cluster I could rewire or solder? Cause I'm lost :sad:


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BigTDogg (MA)
Posts: 4194
Joined: Wed Aug 29, 2007 8:26 am
Car: 1990 Nissan 300ZX TT
Location: Boston MA

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is it intermittent or does it not work at all?

Lunzee
Posts: 26
Joined: Thu Dec 29, 2011 10:52 pm
Car: 1990 300zx na 2 seater
Location: Willow Springs, California

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Speedometers does not work at all, odometer worked for 90 miles out of a 200 mile trip

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BigTDogg (MA)
Posts: 4194
Joined: Wed Aug 29, 2007 8:26 am
Car: 1990 Nissan 300ZX TT
Location: Boston MA

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The two issues are independent I think. Your odo needs to have the gears cleaned and lubed, I'm unsure what is causing your speedo issue.

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es.biggs
Posts: 2120
Joined: Sat Feb 20, 2010 10:32 am
Car: 1990 300ZX 5sp NA
Location: Charlotte, NC

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Speed sensor possibly?

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BigTDogg (MA)
Posts: 4194
Joined: Wed Aug 29, 2007 8:26 am
Car: 1990 Nissan 300ZX TT
Location: Boston MA

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I think if the ODO works, the speed sensor is good, I forget. Just checked, if speedo doesn't work, it's most likely your speed sensor. But for future reference:

Fish #1

Fish #2


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