Go Back   Ford Truck Enthusiasts Forums > Diesel > Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
Sign in using an external account
Register Forgot Password?


Pre-Power Stroke Diesel (7.3L IDI & 6.9L) Diesel Topics Only

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 02-08-2011, 08:28 PM
oldblue89 oldblue89 is offline
Senior User
 
Join Date: Jul 2009
Posts: 188
oldblue89 is starting off with a positive reputation.
1989 F-250 Alternator

I have a 1989 F-250 Extended Cab 4x4 7.3 IDI non turbo with the zF 5 speed. The truck is not charging (I put my voltage tester on the batteries while it was running to test) so I am assuming the alternator is bad (I put the two new batteries in the truck charged at 12.6 volts, when running they weren't at 14 or anything like they normally should be and were actually at 11.9 after a start-up and short drive. What amperage alternator do I need for this truck (and what amperage alternator was in these trucks from the factory)? Does my truck have an external or internal voltage regulator from the factory? Any recommendations on which alternator I should get?

Thanks
Reply With Quote
  #2  
Old 02-08-2011, 08:40 PM
IDIDieselJohn's Avatar
IDIDieselJohn IDIDieselJohn is offline
Post Fiend
 
Join Date: Feb 2009
Location: Ottawa, Ontario
Posts: 7,852
IDIDieselJohn has a very good reputation on FTE.IDIDieselJohn has a very good reputation on FTE.IDIDieselJohn has a very good reputation on FTE.IDIDieselJohn has a very good reputation on FTE.
I think the factory Alts are 100Amps? Can't remember. I think the one I have in my motorhome is a 165amp (E-350) if I remember correctly on that one.


Man I've been away from diesels for to long....


The voltage regulator is on the passenger side inner fender. It is a small square chrome box.
__________________

1990 Ford F250 4x4, ZF5, L/S 4.10, N/A 7.3L Diesel, 568,808km/377,497 miles, still on the original clutch!
1989 Ford F150 300-6, C6, 2.73, 152,000km/95,000 miles.
1987 Ford E350 26ft. Motorhome, N/A 6.9L Diesel, C6, 3.54, 289,000km/180,000 miles.
1985 Ford E350 Ext Van, 6.9L Diesel, C6, 4.11, 677,000km/425k miles
Reply With Quote
  #3  
Old 02-08-2011, 08:40 PM
tecgod13 tecgod13 is offline
Posting Guru
 
Join Date: Sep 2007
Location: Western Mass
Posts: 2,358
tecgod13 is gaining momentum as a positive member of FTE.
Should be an external voltage regulator, it will be mounted on the fender well near the passenger side battery. I'd bring the alternator into someplace like Autozone or Advance that will do free testing for you. You might just need a new regulator, I did this summer when mine stopped charging. Voltage regulator is under $20, so before you buy a new alternator, get the present one checked out. Also, the regulator needs to be well grounded, and so check that, and check that the metal plate its mounted too is actually grounded (its mounted to the plastic fenderwell...)

Oh, and I think the alternator might be 75 amp stock? Although a 100 amp version is also out there.
__________________
1988 F250, 7.3L IDI, regular cab, long bed, 5spd ZF
Mods: ATS turbo, 3.5 inch exhaust, superduty springs front and rear, 4 gauge A-pillar pod: boost, pyro, coolant and 4th spot is switches; was 2wd, now 4wd with Dana 60 front axle
next projects: fix/complete the 3.5 inch exhaust (tailpipe exits waaaaaay to low, and needs to be extended out from under the bed) swap to a rust free cab
Reply With Quote
  #4  
Old 02-08-2011, 09:12 PM
FORDF250HDXLT's Avatar
FORDF250HDXLT FORDF250HDXLT is online now
Post Fiend
 
Join Date: Jul 2006
Posts: 12,567
FORDF250HDXLT has much to be proud ofFORDF250HDXLT has much to be proud ofFORDF250HDXLT has much to be proud ofFORDF250HDXLT has much to be proud ofFORDF250HDXLT has much to be proud ofFORDF250HDXLT has much to be proud ofFORDF250HDXLT has much to be proud ofFORDF250HDXLT has much to be proud ofFORDF250HDXLT has much to be proud of
just get $15-20 ready and hit the salvage yard for 130a 3g alt with built in regulator and have 100a @ idle charge.
search here for more,and search google etc,for all and more you ever wanted to know,and kiss that old 2g and external regulator business bye bye.
__________________
♠ Log Truck: '93 F-Super Duty (F450) XLT 1st Gen Navistar 444ci IDI Diesel w/ Intercooled 2nd Gen Banks Sidewinder Turbo, E40D, 5:13, Dually, 16' Dump & Auto Crane ♠
♠ Chip Truck: '93 F250HD XLT 4x4 1st Gen Navistar 444ci IDI Diesel w/ Intercooled 2nd Gen Banks Sidewinder Turbo, E40D, 3.55, Dually, 9' Dump, & Plow ♠

Reply With Quote
Old 02-08-2011, 09:12 PM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Alternator replacement brandon.edwards 6.0L Power Stroke Diesel 10 01-30-2014 06:27 PM
1977 F250 Alternator Problems maximumd93 1973 - 1979 F-100 & Larger F-Series Trucks 10 03-11-2013 10:52 AM
Alternator ? brandon.edwards 6.0L Power Stroke Diesel 27 02-02-2013 08:46 AM
Alternator Identification backhoeken 1987 - 1996 F150 & Larger F-Series Trucks 0 01-06-2006 06:38 PM
alternator amperage z 97ford1 1997 - 2003 F150 6 08-24-2003 08:53 AM


Go Back   Ford Truck Enthusiasts Forums > Diesel > Pre-Power Stroke Diesel (7.3L IDI & 6.9L)

Tags
100, 1989, 250a, altenator, alternator, amp, external, f250, f350, ford, guide, internal, length, regulator, wiring

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


Participate In The Forums

Create new posts and participate in discussions. It's free!

Sign Up »





All times are GMT -5. The time now is 08:46 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup