wiring

[project88mj]

how do i hook up a tach on to my 88 mj?

[87manche]

get a gauge cluster from the junkyard that has the full package. That's the easiest way.

If you go aftermarket then you'll tap into the signal wire that comes from the ICM.

[Pete M]

I added an aftermarket tach to my 88 years ago. It was a simple setup. I think it was just a power, ground, and feed to the coil. The instructions came with the tach.

[project88mj]

where on the coil?

[Pete M]

Don't remember. Where ever the instructions said to. :dunno:

[Druville]

the tach wire goes to the negative lead on the coil. there are two plugs into the coil on my jeep, one with three wires and one with a single wire. i tapped into the plug with one, thin yellow wire. works like a charm wired it up less than a week ago and seems to be perfect.

[project88mj]

any pics? cause that would help a lot

[512tr]

Here’s the common wiring for an aftermarket tach,

 

 

 

I will assume you should connect the meter’s tach signal wire, to the tach out signal pin (pin C ) at the coil /ignition module

 

 

 

 

[DansGreyMj]

sorry to get off topic but what are the things with the yellow caps on them for

[512tr]

sorry to get off topic but what are the things with the yellow caps on them for

 

They are the diagnostic connectors.