Join Date: Nov 2003
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Re: Tach wire location for remote start install
Found a set of 7 wires (4 heavy guage, 3 smaller)behind the fuse box that are dead-ended for aftermarket install. The four heavier wires are colors red, white, blue and black. If you open the hood you'll find them dead-ended there as well. I metered the smaller wires (white, yellow/white, and green/white) and the green/white tested to be the tach wire, having an AC voltage variance when the accelerator is depressed of up to 1.6 volts.
If any of you plan on installing your own remote start/alarm the tach wire above, and the following main 6-pin connections to the remote module will be needed. They are somewhat different than two wiring diagrams I tracked down. This is what I found to work on my 2004 X with 6.0 diesel.
Unbolt the fuse panel (four bolts) and pull down out of the way as far as you can get it. It won't be far at all. From there, I unbolted the wiring harness (1 spring-loaded bolt, either a 7mm or 8mm head). There are 7 heavy-guage wires and two smaller wires. Yellow/gray connects to your white wire from the module(run only); 2 yellow wires are constant 12V so both red wires from your 6-pin module connects to these; the green wire connects to the module's white wire; blue/green on the X connects to the green for the module; the small yellow/white is 12V in run/start only so connect it to the module's blue wire.
Hope this helps someone. I struggled with this install over a three day period. I'm usually pretty good with household wiring, but this remote start install really kicked my tail! I'd strongly recommend having it installed by a professional.
2004 Excursion 4X4 Limited 6.0 PSD, Mineral Gray Metallic, badged, Tow Mirrors, Rear DVD with wireless sound, 3.73 ratio, limited-slip differential, Rancho steering stabilizer, Hellwig rear anti-sway bar, Air-Lift rear springs.
Towing a 2003 - 32' Fleetwood Pride travel trailer with slide-out.
2003 Kubota BX2200 diesel tractor, with front-end loader, backhoe. Boy, can I dig some holes in the yard with this toy!