Pcm case ground
Posting Guru
Joined: Sep 2014
Posts: 2,404
Likes: 3
From: Asheville-where weird is
Are you stating that you are seeing 30.71 VDC at ground on the PCM?
If yes, could you verify this with a standard volt/ohm meter?
Has anyone removed or changed the wiring on your batteries? If yes, make sure they are not in series and being charged.
If yes, could you verify this with a standard volt/ohm meter?
Has anyone removed or changed the wiring on your batteries? If yes, make sure they are not in series and being charged.
Thread Starter
|
New User
Joined: Nov 2015
Posts: 11
Likes: 0
On case there's 0 ohm to ground - my batteries are not in series - they are parallel --- my right side dies on the road
Posting Guru
Joined: Sep 2014
Posts: 2,404
Likes: 3
From: Asheville-where weird is
Are they being charged?
Posting Guru
Joined: Sep 2014
Posts: 2,404
Likes: 3
From: Asheville-where weird is
Maybe the car gauge pro is incorrect. Do you have a standard volt/ohm meter that you can use to verify the reading.
Trending Topics
Thread Starter
|
New User
Joined: Nov 2015
Posts: 11
Likes: 0
Means case ground not 0v to ground ???
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
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
Senior User
Joined: Mar 2007
Posts: 491
Likes: 0
From: Kingsland, GA
Grounds generally should be 0 Ohm or way less that 1 ohm (I don't get worried on automotive grounds showing a 0.1 ohm resistance, most of the time you get resistance on ground checks, it's due to surface corrosion, clean and repeat). If you have 0 vdc from anything that should be grounded to ground is good, means there is no potential voltage between the two measurement points. It's like measuring on the same post on the battery, no voltage potential exists. Grounds should read 0 vdc when checked to other grounds unless they are isolated grounds or different circuits, I don't know of any of those type circuits in our trucks.
Thread
Thread Starter
Forum
Replies
Last Post
powerstroker100
1999 - 2003 7.3L Power Stroke Diesel
7
Apr 15, 2025 03:14 AM