Can anyone tell me where a good place to tap into the tach signal wire is??
Also what color/tracer it is?

The info I had says blk/gry @ ign switch harness, turned out not to be true?????
I did find a wire in a separate shrinktubed harness along side the ign switch harness, it looks blk/gry, but because of the way it is wrapped and separated I am worried it may be a part of the Airbag sys?


Thanks in advance y'all

 

Tach Black/Gray PCM Passenger's Rear of Engine on Firewall

i know it sounds nuts... but you know where your PCM is? bolted to the firewall on the passenger side that has like a billion wires running into it? well your TRUE tach signal and the only one that should be used will be in there... assuming your installing a remote start? or an aux tach? either way this wire should be used.... sift through the wiring... its going to be a black wire with a small gray stripe in it... if you have any troubles lemme know.

 

this might help too... for a 99 fullsize ram pickup


Constant 12V+ Pink/Black or Red Ignition Switch Harness
Starter Yellow or Blue/Yellow Ignition Switch Harness, Must Add Relay for Remote Start
Ignition Dark Blue Ignition Switch Harness
Ignition 2 Black/White Ignition Switch Harness
Accessory Black/Orange Ignition Switch Harness (Heat/AC)
Tach Black/Gray PCM Passenger's Rear of Engine on Firewall
Neutral Safety Wire Black/White (-) Ignition Switch Harness
Brake Switch White/Tan Brake Switch or Ignition Switch Harness
Trunk Pin n/a
Parking Lights Black/Yellow (+) Driver's Kick Panel White Connector Driver's Kick Panel
Head Lamp Light Green/Black Steering Column
Factory Disarm Light Green/Orange (-) 24 Pin Connector behind Driver's Dash
Door Trigger Yellow (-) Driver's Kick Panel White Connector Driver's Kick
Door Lock Orange/Purple (REV) 10 Pin Connector Driver's Kick Panel Reverse Polarity
Door Unlock Pink/Purple Driver's Kick Panel
Driver's Lock Orange/Black Left Kick Panel
Driver's Unlock Pink/Black Left Kick Panel
Passenger Unlock Pink/Purple Left Kick Panel
Horn Wire Black/Red (-) 74 Pin Connector behind Driver's Dash
Windows Up LF=Light Blue, RF=Brown/White
Windows Down LF=White, RF=Purple/White


gives you the basic wires you may need to do any type of wiring project

 

great, thanks guys. i was thinking about looking near the PCM, but there are three harnesses......
i was worried maybe there would be more than one blk/gry wire.

yeah it is for remote start.

 

there should only be one for that.. tach wires usually a special wire..

ill search more to see if i can get the number of connector for ya

 

ok when the original directions said for the ignition coil... there is a black and grey wire that goes into a connecter on the underside of the coil... if you look at the ignition coil theres a connecter clicked into it up underneath..kinda hard to see.. if you undo that conector and pull back the wire loom youll see 2 wires.. a green and orange and a black and grey..the black and grey is the one they are talkin about.. that could be an option in the event its hard to find that same wire at the PCM end... there the same wire..just easier to access it near the coil...