remote starter on 97 dodge 1500 tach wire

hey im trying to install a remote starter on my 97 dodge ram and i have it all wired up except the tach wire. my truck dosent have a tach wire and cant seem to find the tach wire? now it will turn over for a second and right before it starts the starter will disengage . i fiqure it is because the tach wire isent hooked up?  does anybody know where the tach wire should be at?  thanks

Gray/Black at coil on pass side of engine

Also located as gray/blue at large plug through firewall on drivers side at highest point of firewall, also gray/blue at cluster.

Diesel tach wire is gray/black, located at the PCM on the passenger side firewall or in the main harness that runs along the firewall.

dynamite hack wrote: Gray/Black at coil on pass side of engine Also located as gray/blue at large plug through firewall on drivers side at highest point of firewall, also gray/blue at cluster. Diesel tach wire is gray/black, located at the PCM on the passenger side firewall or in the main harness that runs along the firewall.

I'm having the same problem finding the tach wire.  Do you have any schematic that shows how the gray/black and gray/blue wires relate?

"That's nothing to be proud of Rusty.....fifty yards."

On the pass. side underhood firewall, theres a LARGE harness coming up from the BCM, and heads towards the wipers (best description I can give) . In that harness you will find a blk/grey. TACH, 8 cyl. reading.