89stanger1989

i got the black to ground, red to 12 switch, and green to green coil wire. it could be at 6000 rpm and it will read 2000. a buddy told me it might run on 6 volts because he doesnt think the tach is for a car cause i found it in my garage. no brand either its a small 2 1/2inch.

wrenchturner75

most tachs have a switch to select a 4,6or8 cyl its possible its not on 8cyl.

nitrous_bob

is there a tfi harness going to a msd box ? it must be tapped into the new harness...not the coil harness if so

mjr46

which brand tach did you put on

white93pony

bad tach is my guess

89stanger1989

theres no brand or switch but i'm going to try what nitrous bob said and see if it works

89stanger1989

yea nothing worked. this is probably for a different car maybe 4 or 6 cyl. im just going to buy a new one . thanks

nitrous_bob

i like shift lights better..... it's pretty much the only rpm thats important. as long as your stocker isn't broke.

plus you don't even have to look at it...bright enuff to catch out of the corner of your eye...i like a 5200 chip..by the time you actually hit the shift your about 5500 and it runs really well.

no need for a bracket either....a strip of velcro on the steering wheel base will keep it there good.