help installing 2in tach gauge.

[S14Cuhh]

i got a gauge for free. some random 2 in tachometer . info on how to get a reading from the tach would be greatly appreciated. if theirs a link to anything you know please send to me

thanks

[GSXRJJordan]

Lol most aftermarket tachs have 4 wires, pos 12v, ground, illumination, and signal. The signal wire goes to the yellow/red wire off the ecu, others are pretty self explanatory. There should also be a 4/6/8 switch for number of cylinders.

[S14Cuhh]

im gonna take a pic of the wires so someone can point out which ecu wire to pick up the rpm signal

[projectRDM]

What's wrong with your OE tach? Or do you just like putting extra gaudy shit in your car?

[GSXRJJordan]

What's wrong with your OE tach? Or do you just like putting extra gaudy shit in your car?

I'm guessing the latter. The yellow/red wire (yellow wire, red stripe) coming off the ECU towards the dash harness is the one you want to tap for tach signal.

[S14Cuhh]

What's wrong with your OE tach? Or do you just like putting extra gaudy shit in your car?
nothing wrong with the oe tac.
1. like having the light at night
2. i was free
3.:smash:

[S14Cuhh]

I'm guessing the latter. The yellow/red wire (yellow wire, red stripe) coming off the ECU towards the dash harness is the one you want to tap for tach signal.
thanks for the help. ill see you at the new lbtc meet. still need the secret location???

[GSXRJJordan]

Got it, thanks for the PM.

[S14Cuhh]

okay i tried every wire with yellow and red ...nothing gave me a signal...anyone???

[projectRDM]

If you were just probing every wire that's yellow/red you probably burned the tach input up.

There's a reason you connect to the correct wire and that one only.