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superpoop
09-10-2017, 01:27 PM
Hey guys. As title. I have an erratic spedometer.

It has always had problems jumping around up to 60mph at random, whether the car is moving or not.

I have already swapped out the VSS. any other places to check?

Neill

sam jones
09-10-2017, 02:32 PM
Good morning

I would check:

the instrument cluster electrical large gray connectors for suspect corrosion in pin wire(s), loose connector, and or chafe wire harness.

http://www.supercoupeperformance.com/Instructions/speedo-pic2.jpg

http://www.supercoupeperformance.com/Instructions/instrument-panel-93-pic1.jpg

the speedometer circuit board for suspect solder and or corrosion.

http://www.supercoupeperformance.com/Instructions/speedo-pic14.jpg


If it no defects found replace speedometer.

KMT
09-10-2017, 02:59 PM
Might just be the small plastic gears in the head unit...normal for them to go out after so many years - know if they've been replaced already?

superpoop
09-10-2017, 05:12 PM
Video for those interested!
https://youtu.be/p9A-6VNslKc

No idea whether the gears have been replaced at the moment.

I will take the unit out tomorrow and check the connections. See what the problem could potentially be!

Thanks for the pointers guys!

Neill