My accord is a LX, it has the 'external coil' that is a few inches from the dizzy, but has wire plugs going to it rather than the old school 'can' coils with easy to identify terminals that I'm used to.

Anyways the factory tach seems to read about 500rpm over actual. It's annoying.

So, I figure since I have an old generic autozone tach (I know, it probably sucks, but it's on hand so why not?), and would like to wire it in and hopefully it reads accurately.

There's 2 red, 1 black, and 1 green. I do believe it has a little backlight fyi. Which wire goes where? Where did you hook up your aftermarket tach?

from a site I found...
Red=Power

Black=Ground

Green= Coil (negative side)

thanks!
-matt

 

dug this up this morning... nothing especially useful.
https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/ultimate-diy-aftermarket-tach-installation-949918/

 

Which wire to I attach the green (coil) wire to? In the thread listed above (regarding Civics) there is a wire that goes to the factory tach which may be used. Is it the same with Accords? Or is it different?

 

I can't believe nobody has done this... wow...

 

Tach signal is a blue wire from the distributor. Check out www.the12volt.com form more

 

Tap the red wire to 12v IGN, Tap the black wire to GRND, and Tap the Green wire to the blue wire coming out of the Distributor harness connector. Or you can try to find the tachometer plug in for diagnosis on the passenger side by the fuse box and hook the green wire to there. Good Luck!

 

a lot of the external coil setups like that actually have a resistor inside of the coil that drops the voltage on the blue wire going onto the car, i know the 86-89 accords, and the early tegs all have that same coil, it will have two plugs that plug into it correct? you can try to tap into the tach wire inside of the car, if it doesn't work, you will have to tap into the blue wire going from the dizzy to the coil, everytime the coil fires, it because the igniter interrups ground to the coil, the tach counts this and converts it to RPM, make sure the tach is also set for the right number of cylinders, most are set at 8 by default.