Wiring an EGT guage

jmsrbrt · #1 (**permalink**) 12-25-2007, 06:06 PM

I have a 2005 F-250 with the 6.0L diesel. I have no wiring diagram, and had no luck today probing under the dash, trying to find a hot 12v source and a ignition switched 12v source. I realize I could get a constant hot from the fuse panel, but none of the wires coming out of the steering column indicate a switched source. Anyone got a diagram that could tell me color of wire to look for? I have a Chilton book, but the diagrams in the back are the pits.

busdriver47 · #2 (**permalink**) 12-25-2007, 07:02 PM

Go to the diesel manor web site. It has all the info you need.

trfield58 · #3 (**permalink**) 12-25-2007, 07:03 PM

If you go to this page from DieselManor's installation instructions, it will show you which wires to use.

http://www.dieselmanor.com/diy/PSD3-gauge/image34.htm

trfield58 · #4 (**permalink**) 12-25-2007, 07:04 PM

bythe way, that pictures shows the area directly behind the panel under the steering wheel (fuse panel location)

wrangler76 · #5 (**permalink**) 12-25-2007, 07:27 PM

Yeah, I had trouble finding a good powersource for my trailer brake box when I was wiring that. Taking it out fo the fuse box makes things look terrible!

jmsrbrt · #6 (**permalink**) 12-26-2007, 08:42 AM

[quote=trfield58]If you go to this page from DieselManor's installation instructions, it will show you which wires to use.

http://www.dieselmanor.com/diy/PSD3-gauge/image34.htm[/QUOTE]

Hence, my confusion...there is no "red with yelow trace" wire in that bundled cable coming down from the steering head. I checked the wires and one has 12v on it, but goes to zero when the truck starts; two have less that 12v and the guage acts funny when connected (light comes on but the needle spins). The diagram also has instructions for a 'switched 12v source', a 'ground', and a 'place to connect the illiminaire' but my guage needs just a constant 12v, switched 12v and a ground. Thanks for the help but I think I'll still need a wiring diagram.