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i scored a tach cluster at the junkyard. i pluged it in how do i get the tach to work?

You need to tell us more - year, engine and tranny type and we can help you from there

oh sorry. its an 88 d50 2.0 5 speed. when i got the tach cluster i cut all the plugs of to go with it and there is a few more wires on the tach cluster plugs compared to my stock non tach cluster plugs on the truck. maybe i gota add a few wires?

I'll dig out my shop manual and scann you the tach cluster wiring diagram and post it for you tomorrow.

I had to run a wire from the back of the cluster at a certain bolt to the negative side of the coil. Theres a thread somewhere on it.

i remember on one model there was a plug on the firewall that you had to plug in in order for the tach to work. But i've always just ran a wire from the tach input on the cluster to the negative side of the coil.

ya the plug on the firewall is pluged in. for some reason i cant open those links for the tach install. if some one could just tell me what wire to hook up the tach signal to? thanks for the help.

On my 1st Gen, there was a screw on the back of the instrument cluster that said TACH. I ran a wire from that screw to the (-) side of the coil. Works like a charm.

like jim said is right. The pins on the printed circuit board on that back of the cluster should also be labeled. On my isuzu it had a wire going to the ecu as a tach signal i guess but the stock cluster had no tach. So when i swapped clusters i found what pin in the plug was for the tach and ran it to the negative side of the coil. Also feel like i should mention that if you have an aftermarket ignition system (msd or similar) most of the time you cant run it directly off of the coil, you have to run it through the ignition box