I've searched for this already but I haven't figured out anything that can help me.

I need to know what wire coming out of the plug for the coil pack to tap into for an aftermarker tach. Is it the white wire? Because there's only one. This is not under the IDI cover, it's in the plug harness.....

THANKS and sorry if I missed a post like this somewhere else.....

You can't get a tach signal there, I tried

You have to tap directly into the PCM to get it. Connector 2 (Black), Pin 10. You can get a PCM pin-out from http://www.ny-jbodies.org/library/library.asp, just look at the 1997 one, since the 99 and 00 are the same basically. You'll need to get the pin from the dealer, and insert it into the connector, its not hard, just be very careful trying to get the orange rubber plug out, it rips easily.





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Where exactly is the PCM located?? I know where the BCM is but haven't looked for the PCM.

if you take the front bumper off, its right underneath where the passenger corner light would be. You'll see a wire bundle going up into an area covered in rubber sheets, behind it is the PCM. You'll see the two connectors at the bottom, each have a single bolt in the middle. Just unscrew the bolt and the connector comes off.





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Hollie Shat!!!

I guess I'll have to check into that tomorrow.

Thanks.

Ok in liu to all that's been said. I have an Autometer 5" tach. And i have the very same problems with mine. Even called autometer, they said it's a 4 pulse tach... never mentioned ANYTHING about you CAN run them 2 pulse. I have a friend that did it and it works. the only problem is between 1k-0 it's jumpy b/c it's only picking up 1/2 the pulses. But after that it's completely ACCURATE!

I wired mine to the White wire that plugs into the Ignition by the IDS cover. Follow that white wire.. And be sure to make the tach a 2 pulse tach ( I had to do so by cutting both wires allowing it to picck the signal up) If you do that and dont mind a jumpy needle arouns 900-0 rpms then it'll work. If not.. I dunno I never found a wire to run a 4 pulse to. I bought a few tach adapters.. none seem to have worked. So in a last ditch effort I did this. And GLORY it worked. LOL

remember 2 pulse.. white wire = Tach signal



Faith is to believe what you do not see; the reward of this faith is to see what you believe.
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I just bought the Stewart-Warner digital tach from Jason's group purchase and Idon't wanna fry it.

Quote:

You'll see the two connectors at the bottom, each have a single bolt in the middle. Just unscrew the bolt and the connector comes off.

Which of the two bolts do I need to remove? Looking up at it from the bottom??

Pick one, if thats not it, do the other one

The bolts just hold the connectors into the PCM, they come off easy, they go back on easy. Connector 2 is the black one, and I'm pretty sure its the one closest to the car.





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