ok so i got a gauge cluster from a 1981 2wd pickup. it has a tach. mine did not originally have a tach. so i think i know what wires are for the tach (the ones right above the speedo cable) but neither wire has power. so where do i get the power for one of those wires.

 

i did the same thing on my 81 2wd there should be a yellow wire going to the emmisions computer.computer need not be there.i cut it off the plug and ran a wire up to the back of the cluster.where the tach is mounted.looks like your in spokane if you need help i might be able to help out pm me.

 

If you guys are interested... I have a cluster from an 81 4WD with tach, and everything else..

 

pm sent.

nah i just got the 2wd one, and i can't hook up my 4wd light lol. i might make a 4wd cluster with the parts if i want to.

 

i checked my book and the there should be a green plug on the driver side kick pannel with alot of wires going to it it is hook to a grey or brown box could be black to,or it might have been removed if you have no emmisions equip on the engine.it should have a black wire with a red stripe that is your signal wire from the dizzy i believe,i thought it was yellow cuz thats the color of wire i used to run it up to the back of the tach that should be the only wire to hook up to it if i remeber correct id have to look at the back of the tach to double check.

 

do you have a haynes manual if not get one it has great wire diagrams for the early wiring systems easy to read to

 

Ok i'll look. Not sure which wire is for the tach. Theres no plug in right behing the tach. Only above the speedo cable. I'll check though. If i can't figure it out maybe we'll meet up. No dont have a haynes manual. Only a chiltons and its no help in this situation lol.

 

ok i looked at my plug and it must be a blue wire with a red stripe.the wire diagrams are a pain to tell what some of the colors of the wires are.i did this mod on my 81 2wd but i sold it a wile ago so im trying to rember what wire i hook to the tach.here is a pic of the plug under the dash near the drivers kick panel just above the hood release.

 

the book say's this is a speed sensor wire for the emmisions comp.likewise a tach wire

 

ok so if that is, is it supposed to be plugged into the computer thing? cause i have a plug off of the computer that doesn't go to anything.

 

no computer nessasary that is the wire going to the computer.comp being on the other side of the plug.ie plug goes into comp. you should be able to snip the blue wire with red stripe and run it up to the back of the tach.im pretty shure it take just that wire.

 

that wire is supose to be the speed sensor wire for the emissions comp

 

ok. so i still have all the emission stuff on my truck. and which is the tach plug on the back of the gauge cluster. it's not really labeled lol.

 

your computer can still be there it is the plug that plugs into the comp.none behind the dash you will have to run your own wire up to the back of the cluster.the blue wire with a red stripe on that plug will give you the tach signal run a wire from there up behind the cluster and use a ring term on the back of the tach where it hooks up