2003 f250 6.0l diesel remote start
Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=111821
Printed Date: August 28, 2025 at 3:32 PM
Topic: 2003 f250 6.0l diesel remote start
Posted By: ayaresr
Subject: 2003 f250 6.0l diesel remote start
Date Posted: February 21, 2009 at 10:49 PM
I am working on a remote start system for my 2003 Ford F250 6.0L diesel. Wiring listed in searches doesn't appear to match the wire colors I am finding in the ignition harness. Anyone have correct info for me? Thanks, Ryan
Replies:
Posted By: i am an idiot
Date Posted: February 21, 2009 at 11:47 PM
 | Battery | | YELLOW | | (+) | | IGNITION SWITCH HARNESS | | | | Ignition 1 | | RED / GREEN | | (+) | | IGNITION SWITCH HARNESS | |  | | Ignition 2 | | GRAY / YELLOW | | (+) | | IGNITION SWITCH HARNESS | | | | Accessory 1 | | RED / BLACK | | (+) | | IGNITION SWITCH HARNESS | | | | Accessory 2 | | GRAY / YELLOW | | (+) | | IGNITION SWITCH HARNESS | | | | Starter 1 | | DARK GREEN | | (+) | | IGNITION SWITCH HARNESS | | | | Anti-Theft Type | | SECURILOCK | | | | Anti-Theft Descript | | AN RF SIGNAL ACTIVATED SYSTEM | | | | Key Sense | | BLACK/ PINK | | (-) | | IGNITION SWITCH HARNESS | | | | Neutral Safety | | RED / LIGHT BLUE | | (+) | | IGNITION SWITCH HARNESS | | | | Tachometer | | LIGHT GREEN / WHITE | | (-) | | AT THE PCM PIN NUMBER 19 | | | | Speed Sense | | GRAY/BLACK | | (AC) | | IN HARNESS ON INTERIOR DRIVERS SIDE OF FIREWALL | | | | Parking Lights | | BROWN | | (+) | | IN HARNESS IN DRIVERS KICKPANEL | | | | Brake Lights | | GREEN | | (+) | | AT SWITCH ABOVE BRAKE PEDAL | | | | Reverse Lights | | BLACK/ PINK | | (+) | | IN HARNESS UNDER BRAKE BOOSTER | | | | Horn | | BLUE | | (-) | | 6-WAY PLUG RT OF STEERING COLUMN |
Posted By: ayaresr
Date Posted: February 22, 2009 at 7:55 AM
I do not have the ignition 1 (RED / green) but do have a blue green which was one of the wires that showed power with the key on, anyone know for sure short of me cutting it and seeing what doesn't work if this is an ignition wire on my truck?
Also, the chart above shows two gray / YELLOW wires, one as ignition, and one as accessory. I have one gray / YELLOW wire approx 10 gauge, as well as one WHITE/ yellow wire (thinner) approx 14 gauge. Would these be what's being referred to above, and does anyone have insight as to which would be accessory and which would be an ignition?
Thanks again,
Ryan
Posted By: i am an idiot
Date Posted: February 22, 2009 at 9:16 AM
Do you have a volt meter?
Posted By: ayaresr
Date Posted: February 22, 2009 at 5:09 PM
Yes, I do have a DVM. My understanding was the accessory wires should drop off while cranking to make the extra available to the starter motor. Everything I tested seemed to stay hot (unless my meter isn't refreshing the voltage fast enough before the engine kicks over). I'm fairly certain of the wires I have tested what I need to be using but just not sure which should be on the ignition side vs the accessory side.
Ryan
Posted By: i am an idiot
Date Posted: February 22, 2009 at 6:09 PM
Does the ignition switch not turn backwards for accessory in that vehicle? There is a note on the info above that I had overlooked, it reads as follows: ON 6.0 DEISELS IGN#1 WIRE IS WHITE/ YELLOW
Posted By: ayaresr
Date Posted: February 22, 2009 at 10:31 PM
Key will turn backwards for accessory...and why I never thought of that I'll never know. I have seen some other sites note that the diesel tach wire is WHITE/ green in harness behind parking brake held up by white tape. I have this harness, but that color wire shows a constant 12 volt positive regardless of key position or engine running or not. Is there another wire in this harness that would carry the tach or is the PCM the correct location for this? Thanks, Ryan
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