Erratic speedo

[Kiwi Mal]

G'Day all.
Has anyone got any info on sorting the speedo on a 1990 24v safari?
I need an elecrical diagram for the speedo circuit board and wiring so I can power it up on the bench to test the circuits. I dont know if a wksp manual would have that kind of detail as I dont have one yet, still looking.
Ive been told that the soldering in the nissan gauges is dodgy and it is most likely a bad conection somewhere.
Also is the needle a push on fit or are they glued???
Any help appreciated.

[Ade]

Mines 1991 24v safari too. Starts with erratic now end up with no reading at all. The only thing that still functioning on mine is the tacho. All needles a push on fit, but they'll easily break if you're carefull..

[Kiwi Mal]

Thanks for the tip on the needle. Got it off ok and now my tame elec tech is playing with the internals.