Tach wire ? What color ?
 

what color is the tach wire on my 99 civic ?

its probably blue.

look for a blue wire with maybe a orange or red line or do wut i did put the black on ground red to the fuse panel for wen u turn the car on itill go on no need for light yet but run the car and stick the end of the wire in the harness but try each piece in the harnes at a time like the lil metal things and everytime u test it look at ur tach like i did but yah normally its the blue wire in jdms

Its green or blue.

JDMS are normaly blue with a red lind on it i can garuntee its bloue lol never saw a green tach wire except the wire thats on the tach its self but u got to connect it to the blue wire ....

wrong section, what do you need the tach wire for? tach not working or install aux tach?

blue

just an aftermarket tach im gunna need one also lol mine dont have a tach lol
so yah basicly AUX tach

just put an Si cluster in.. plug and play tach..

what in mi 91 or for imported marty99 lol cuz i herd ppl saying putting a si cluster in ther 91