Notices
Excursion - King of SUVs 2000 - 2005 Ford Excursion
Sponsored by:
Sponsored by:

Primary Battery?

Thread Tools
 
Search this Thread
 
Old Feb 5, 2025 | 08:00 PM
  #1  
Wave Guy's Avatar
Wave Guy
Thread Starter
|
4wd High
Joined: Jul 2021
Posts: 9
Likes: 4
Primary Battery?

I'm doing some electrical work on my 01' Excursion....new lighting interior and exterior, replacing stereo and adding powered Sub, new CB radio (I'm old school), adding brake controller, adding a large power inverter in the rear for tool power, fish/hunt camp, etc. Adding new fog and light bar, as well as top marker lights, etc.

My question is there are 2 batteries, are one of them (captains side or drinkers side) that is secondary?
 
Reply
Old Feb 6, 2025 | 01:37 AM
  #2  
John in OkieLand's Avatar
John in OkieLand
Lead Driver
Community Builder
Liked
Loved
Community Favorite
Joined: Aug 2022
Posts: 5,067
Likes: 1,416
From: Oologah, OK
Club FTE Silver Member

That depends on which battery is being supplied the charging current from the Alternator. In any case, they must be the same Age, and CCA, and brand/model.

on my truck, the Driver's side is the only battery with the heavy 2 ought cable, I have a 340 Amp alternator, so that cable has to be BIG. and I have a Winch that pulls a lot of current when loaded, and I wanted the Alternator to be able to put out enough current at Idle to keep up with the Winch.

Rainmaker has tied both batteries to his Alternator, it is also a MechMan like mine... they regulate at 14.5-15.0 volts,, depending on underhood Temperature.




 
Reply
Old Feb 6, 2025 | 07:33 AM
  #3  
Excurvelle's Avatar
Excurvelle
Logistics Pro
15 Year Member
Liked
Loved
Community Favorite
Joined: Mar 2010
Posts: 3,532
Likes: 495
From: NC
Originally Posted by Wave Guy
I'm doing some electrical work on my 01' Excursion....new lighting interior and exterior, replacing stereo and adding powered Sub, new CB radio (I'm old school), adding brake controller, adding a large power inverter in the rear for tool power, fish/hunt camp, etc. Adding new fog and light bar, as well as top marker lights, etc.

My question is there are 2 batteries, are one of them (captains side or drinkers side) that is secondary?
Nice Vice Grip Garage reference
 
Reply
Old Feb 7, 2025 | 08:49 AM
  #4  
Antonm23's Avatar
Antonm23
Fleet Mechanic
Community Builder
Community Influencer
Liked
Community Favorite
Joined: Mar 2023
Posts: 1,587
Likes: 929
If both batteries are connected, then they are a bank, and neither (or both) are primary / secondary. As both will respond to any load applied / voltage change.

You can split them out using relays and such to make one a primary (or starting battery) and one a secondary (or house battery), but assuming your 01 Excursion is a diesel and the batteries are in the factory configuration, then there is no primary or secondary , they're just both batteries that are working together all the time.

(In Derek's voice) ,,,So as long as the battery has a go handle, a feller can hook up to either one he wants to.
...
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Greaser007
All Things Towing
5
Jul 8, 2024 08:35 AM
oneowner83
Electrical Systems/Wiring
2
Jun 2, 2016 07:36 PM
runemaster
1983 - 2012 Ranger & B-Series
2
May 4, 2005 09:15 PM
hexxed
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
3
Mar 6, 2003 08:39 PM
weldman
Audio & Video Systems, Navigation, Satellite Radio & Mobile Electronics
4
Apr 28, 2001 12:11 AM




All times are GMT -5. The time now is 03:41 PM.

story-0
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-1
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-2
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE
story-3
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-4
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-5
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-6
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-7
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-8
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-9
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE