tacho playing up???

[84_vk_wgn]

my tacho is intermittantly working on the vk.
im talking about the stock one.
as im driving along all of a sudden it will ping up and start working.
any ideas???
im guessing a faulty connection somewhere.
where abouts do the tacho wires hook up to???
cheers shane

[Goon]

Black - Negtive

Red - 12v accessory

Green - Coil

White - is for a light i dont have this connected cause my car is an auto

[bommodore]

the standard tacho only has one wire that goes to the coil the rest is interal if you take the cluster apart the tacho is held in by some screws take them out and the tacho just pulls out clean the three contact points thats what i did and its been fine ever since

[84_vk_wgn]

cheers fellas
i will take it apart and give it a clean.
hopefully it works