2004 excursion “I messed up”
Cargo Master
Joined: Nov 2017
Posts: 3,110
Likes: 540
From: Rock Hill, SC
You may have suffered PCM damage, my original suggestion was to have the alternator checked, and would still be a valid check point, the voltage regulator probably got damaged. But you may have more going on now.
Laughing Gas
Joined: Jun 2021
Posts: 983
Likes: 366
Looks to me like your alternators voltage regulator got fired. When voltage drops below 10 things start to shut themselves off. The voltage regulator is available separately from the alternator (link to just one example below).
https://www.summitracing.com/parts/SMP-VR455/applications/engine-type/v8/year/2004
...
https://www.summitracing.com/parts/SMP-VR455/applications/engine-type/v8/year/2004
...
Thread Starter
|
5th Wheeling
Joined: Dec 2021
Posts: 34
Likes: 2
ok, I put in a known good PCM and I think I’ve ruled that out. Judging by the voltage readings I’m hoping it’s the regulator in the alternator. I will keep you guys posted. I have not done the one fuse at a time thing yet.
Fleet Mechanic
Joined: Oct 2010
Posts: 1,407
Likes: 155
From: Milwaukee, WI
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Thread Starter
|
5th Wheeling
Joined: Dec 2021
Posts: 34
Likes: 2
It seems to be acting fairly normal KOEO actually. Voltage is odd, batteries read 12.5 but the sct only shows 10.5. The company I bought the alternator from thinks voltage regulator so they are going to replace that. Unfortunately it’s uses a smaller pull and belt so my old alternator won’t even go on to test without getting a new belt so since they are paying shipping I’m just going to wait.
Cross-Country
Joined: Feb 2022
Posts: 52
Likes: 11
From: Chester Springs
I've had many shorts with fountains of sparks over the years and usually the only damage is to the battery and my pride... Easy thing to try is swapping in another battery (or two) or just attach some jumper cables to an idling nearby vehicle's battery, then see if you still get the flashy flash on the dash.
Veteran/Sheepdog
Joined: Feb 2012
Posts: 6,047
Likes: 110
From: Western AR
The over-current condition you experienced melted wires/contacts somewhere from the battery+ to the main fuse box. I bet you (or someone you hire) will have to go through it inch by inch to find the "melts".