Tachometer Wiring, Avoiding Adapter
QuickSlvr11984
10-21-2004, 02:05 PM
does anyone know how to hook up a tachometer in a 1994 cavalier 2.2 without using a adapter. the tach has 4 wires, red (power), Black (ground), yellow (dimmer or whatever) and Green. i lucked out with routing things through my firewall because i put the tach in a peice of black wood and put it whre my radios at, and my radio where my cup holder is. so i just connected all the wires with my radio harness. except the lead. ive been to 5 differnt websites reading all the threads about installing tachs in cavaliers. none of the help. so if anyone has a working tachometer in there cavalier and didn't use an adapter, please help out.
4dr92cavi4cyl
10-21-2004, 03:12 PM
My mechanic said there is a tach wire in the dash but it's just not used in autos, but it's still there. I don't know but it might help.
QuickSlvr11984
10-22-2004, 12:58 PM
i have a stick, i was thinking of attatching the lead to the wire that connects with the shift up light. whenever i hit a certain rpm a light comes on tellinng me to shift up, do u think that would work?
4dr92cavi4cyl
10-22-2004, 01:56 PM
No, that's an on or off signal for the light, I'm guessing your cavy has no tach in the dash? Some did but most don't, if your's has one you could use that wire for the green, if you feel like taking apart the dash. I have never installed a tach but my guess is the yellow wire is for the backlight/power switch in the tach, just tap into an ignition wire so it comes on with the key and doesn't drain your battery. Looks like you have that done right. Does the tach light up when you turn the ignition on?
jayson716
10-22-2004, 08:17 PM
My mechanic said there is a tach wire in the dash but it's just not used in autos, but it's still there. I don't know but it might help.
not used in autos?? my auto has the tach
not used in autos?? my auto has the tach
QuickSlvr11984
10-24-2004, 08:24 PM
yea everything electrical lights up, but im just wondering where i can hook up the lead signal wire to the car? i have no in dash tach
4dr92cavi4cyl
10-25-2004, 01:39 PM
Jayson,
Wish all 2nd gens had tachs, do all 3rd gens have a factory tach?
Like I said, I think there is a wire in the dash used for the few 2nd gens that had tachs. Not even sure if it exists but worth a try. If you don't feel like pulling the dash apart yet, get a Haynes manual or something, if you find that wire let me know, I want a tach on mine! Good luck
Wish all 2nd gens had tachs, do all 3rd gens have a factory tach?
Like I said, I think there is a wire in the dash used for the few 2nd gens that had tachs. Not even sure if it exists but worth a try. If you don't feel like pulling the dash apart yet, get a Haynes manual or something, if you find that wire let me know, I want a tach on mine! Good luck
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