Wiring up gauges soon need some advice/pointers.

[Mosinguy]

I want to put a trans temp, tach, and vacuum gauge in my truck. Now what wires should I splice so my gauges light up? I'm thinking radio but I'm not quite sure.

Also, how do you hook up a tach and a vacuum gauge to a 3.0? I was thinking of pulling the brake booster line and putting the gauge in there, unless someone has a better idea on where to put it. Doesn't the tach wire into the coil somehow? Also, where would the best place be on my dash to mount these gauges? I was kinda thinking of putting them either kinda under the dash or putting the gauges near or on the A-pillar.

Any and all advice is appreciated!

 

[swynx]

I would wire it So the lights turn on when your dash lights come on. Some people splice into a wire some people plug into the fuse spot. There should be a write up in the tech sanction on tach install. Also there is a write up of how to wire stuff to switches if you need that. Its a DAMN good write up. You can literally wire something up off the diagrams.

 

[RonD]

1992 3.0l should have a regular coil, tach wire connects to the "-" on the coil.

1990-1992 and some 1993 2.9L -- Tach test on coil (Tan with Yellow Stripe)
1990-1992 and some 1993 3.0L -- same as above

3.0l should have a Vacuum manifold(where most of the small vacuum lines go), and will have some capped ports on it, remove a cap and use that port.


There should be a light blue/red strip wire from the light switch to the fuse panel, then light blue/red strip to each dash light.
This wire would be best to splice into so you will get the dimming option.
Between fuse and a light