Need some info on gauge wiring

Need some info on gauge wiring

I got a couple of new gauges in (finally) and just have some questions about their installation (did not come with instructions, but they are ae technics gauges).
The voltmeter is no big deal - just wire up to a 12v source, ignition turn on
The temperature sensor I have no idea how to install. There are three wires coming off of it - red, black and green. Now sure what the wiring is for that.
The oil pressure gauge taht I have is pretty much useless - it is an electronic one, not a manual gauge, but it did not come with a sensor or sensor to match up with it (again, same three wires coming off it).
The last is a tachometer that I will be picking up tomorrow. Havnt been able to find in my Haynes manual what wire it is on the harness that I need to tie that one into.

Any help would be greatly appreciated. Thank you

Can't remember whether it was here or www.VVT-i.net, but the tach installation was just covered in detail the other day. There's a wire in the engine fusebox that you can link the tach to. Search around on either forum and you should be able to come with more detailed info though.

Thank you kindly. I'll expand my search and see what i can find.

use a test light under the dash when the engine is running.. it's either a black/green or black/white or white/black..

find a signal that pulses.. that'll be your tach... it'll be in the plug that goes into your stock cluster.

you can't wire the temp gauge without a sensor, so that gauge is useles..

yea the temp gauge isnt a big deal. for sure i am going to use the vometer, and the oil pressure if i can, with the tach in there. i'll see if my multimeter has a mode for that...(pulse)

actually, use a testlight.. more visual and quicker reacting.

A haynes manual has a gauge cluster wiring diagram, you can use it to pintpoint the wire without going through the trouble. But if you like to probe I find a VOM works best, tach signal rarely goes over ~5V.