No start
Thread Starter
|
8th Gear
Joined: Mar 2025
Posts: 8
Likes: 0
Ok. Have you seen the truck running with the PCM that's in it? I'm just trying to rule out the possibility that someone may have put a PCM from an Excursion in it. I don't think that's probably what's going on, but it would explain everything. The calibration code is on a label on the connector, or you may be able to see it in OBD mode $0A (IIRC) data.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
It is my understanding that the PCM controls the WTS light. If it's not being illuminated, it could be as simple as the fuel bowl heater being blown and now the PCM has no power. Or it could be as annoying as the light is not functioning in the dash. Either way you need to know that the computer is being powered properly. There's also the IDM mounted inside the LF fenderwell that drives the injectors and it sometimes fails too. But that WTS light is mandatory IMO to be verified and working so you know that the "brains of the operation" are alive and kicking, so to speak.
Thread Starter
|
8th Gear
Joined: Mar 2025
Posts: 8
Likes: 0
It is my understanding that the PCM controls the WTS light. If it's not being illuminated, it could be as simple as the fuel bowl heater being blown and now the PCM has no power. Or it could be as annoying as the light is not functioning in the dash. Either way you need to know that the computer is being powered properly. There's also the IDM mounted inside the LF fenderwell that drives the injectors and it sometimes fails too. But that WTS light is mandatory IMO to be verified and working so you know that the "brains of the operation" are alive and kicking, so to speak.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
HMMMMM, yeah there is that.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
Halffastgarage
1987 - 1996 F150 & Larger F-Series Trucks
0
Apr 29, 2024 06:20 PM
Willheishman
1994.5 - 1997 7.3L Power Stroke Diesel
6
Jan 11, 2022 04:54 PM