ok i wired the 5 inch tenzo R tachometer evey thing works including the shift light but the numbers dont light up when i turn the lights on and i dont no wat to wire them to i only have 1 wire left and its for the lights ?

 

What color is it? if it's white then yeah, it goes to the wire that gets power when you turn your headlights on usually... or you can wire it to anything powered by ignition but it should be wired for that already, also your tach could be fried...

 

well most likely your tach isn't fried...but if you haven't figured it out yet wire the white wire into your fuse box under the dash to one of you parking light fuses just push the wire down in the hole with the fuse this is how i've seen alot of them done and mine and i've had no problems also when you turn on your lights the light should come on