Notices
1999 - 2003 7.3L Power Stroke Diesel  
Sponsored by:
Sponsored by:

2000 7.3 electrical problems

 
  #1  
Old 01-24-2013, 06:33 PM
watatrp's Avatar
watatrp
watatrp is offline
Junior User
Thread Starter
Join Date: Jul 2011
Location: South Bend, IN
Posts: 61
watatrp is starting off with a positive reputation.
2000 7.3 electrical problems

Trying to diagnose a problem w/ my daughter's Excursion. 2000 w/ 7.3. Died the other day while running. Found out that one battery is completely discharged. The other is fine. Batteries are less than six months old. Took the battery in and it can be charged and holds a charge. Put it back in and after driving for a few miles, the battery is losing it's charge again. Alternator is putting out almost 13v. My guess is the wiring to the bad battery is bad. Both batteries should be connected to each other right? Seems like the battery that is losing it's charge is not connected to the alternator. When it dies, takes a jump to restart. Any ideas?
 
  #2  
Old 01-24-2013, 06:38 PM
BigAlsPSD's Avatar
BigAlsPSD
BigAlsPSD is offline
Post Fiend
Join Date: May 2009
Location: Pea Ridge, AR
Posts: 5,470
BigAlsPSD has much to be proud ofBigAlsPSD has much to be proud ofBigAlsPSD has much to be proud ofBigAlsPSD has much to be proud ofBigAlsPSD has much to be proud ofBigAlsPSD has much to be proud ofBigAlsPSD has much to be proud ofBigAlsPSD has much to be proud ofBigAlsPSD has much to be proud ofBigAlsPSD has much to be proud of
The batteries are hooked to each other in parallel, positive to positive, negative to negative(although the neg is not directly wired to each other in this case), and the alternator from the factory has just the one positive wire attached to the DS battery.
 
  #3  
Old 01-24-2013, 07:13 PM
BWST's Avatar
BWST
BWST is offline
Elder User
Join Date: Dec 2012
Location: Lake Stevens, WA
Posts: 811
BWST has a good reputation on FTE.BWST has a good reputation on FTE.BWST has a good reputation on FTE.
13V seems a little low for the alt output. Should be just over 14 I think. Worth checking the connections though first like you're doing.
 
  #4  
Old 01-24-2013, 07:20 PM
srteach
srteach is offline
Elder User
Join Date: Mar 2012
Posts: 609
srteach is gaining momentum as a positive member of FTE.srteach is gaining momentum as a positive member of FTE.
https://www.ford-trucks.com/forums/1...tor-issue.html
Take a look at that information. Read all the posts, since I won't retype it. Thread from earlier today, same situation.

The alt should be putting 14-16V out when running. 13V is too low to run the truck and charge the batteries.
 
  #5  
Old 01-24-2013, 07:38 PM
watatrp's Avatar
watatrp
watatrp is offline
Junior User
Thread Starter
Join Date: Jul 2011
Location: South Bend, IN
Posts: 61
watatrp is starting off with a positive reputation.
Originally Posted by srteach View Post
https://www.ford-trucks.com/forums/1...tor-issue.html
Take a look at that information. Read all the posts, since I won't retype it. Thread from earlier today, same situation.
That is too funny. That's my son-in-law. Guess he's taken it on himself to learn about his own diesel. Sounds like he's headed in the right direction. Might be in my garage this weekend replacing an alternator. Spent enough time yesterday running his family around. He owes me dinner.
 
  #6  
Old 01-24-2013, 07:44 PM
srteach
srteach is offline
Elder User
Join Date: Mar 2012
Posts: 609
srteach is gaining momentum as a positive member of FTE.srteach is gaining momentum as a positive member of FTE.
You might be replacing an alt this weekend, too.

WAIT A MINIT!!! I've been help you and him on the same truck for the same problem?!?!? Damn!
 
  #7  
Old 01-24-2013, 09:46 PM
howellt39's Avatar
howellt39
howellt39 is offline
Senior User
Join Date: May 2011
Location: Portland, OR
Posts: 454
howellt39 has a good reputation on FTE.howellt39 has a good reputation on FTE.howellt39 has a good reputation on FTE.
Originally Posted by srteach View Post
You might be replacing an alt this weekend, too.

WAIT A MINIT!!! I've been help you and him on the same truck for the same problem?!?!? Damn!
If that ain't good for double reps I don't know what is.
 
  #8  
Old 01-25-2013, 08:22 AM
srteach
srteach is offline
Elder User
Join Date: Mar 2012
Posts: 609
srteach is gaining momentum as a positive member of FTE.srteach is gaining momentum as a positive member of FTE.
I've never asked for reps. Don't really care about them, that's not why I'm on FTE (and only FTE). I'm here to help, just like others have for me.
 
  #9  
Old 01-25-2013, 11:51 AM
crop harvester
crop harvester is offline
Posting Guru
Join Date: Jul 2011
Posts: 1,641
crop harvester has a very good reputation on FTE.crop harvester has a very good reputation on FTE.crop harvester has a very good reputation on FTE.crop harvester has a very good reputation on FTE.
if that bad battery is internally shorted,you might not be able to diagnose the alternator until batteries are taken care of first.hopefully the batteries haven't already killed the alt.
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
12valveEx
Excursion - King of SUVs
10
08-16-2013 08:24 PM
sprint406
1999 - 2003 7.3L Power Stroke Diesel
37
02-21-2012 06:25 PM
copterdocc
1999 - 2003 7.3L Power Stroke Diesel
2
07-20-2010 03:12 PM
bucklut
1999 to 2016 Super Duty
4
07-15-2006 08:43 PM
tamwill
1973 - 1979 F-100 & Larger F-Series Trucks
9
10-14-2001 11:28 AM


Thread Tools
Search this Thread
Quick Reply: 2000 7.3 electrical problems


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.