Notices
1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
Sponsored by:
Sponsored by: Moser

alt lite

Thread Tools
 
Search this Thread
 
Old Nov 16, 2012 | 03:21 PM
  #1  
docholy45's Avatar
docholy45
Thread Starter
|
New User
Joined: Nov 2012
Posts: 4
Likes: 0
alt lite

i have a 1977 camper special replaced alt and volt reg gettin14.7on meter but alt lite stays on any ideas help
 
Reply
Old Nov 16, 2012 | 03:49 PM
  #2  
fmc400's Avatar
fmc400
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Club FTE Gold Member
Check these two things:

1) Make sure the ALT light goes OFF if you unplug the regulator. The regulator should be the ALT light's only path to ground.
2) Make sure you have a solid connection between the STA or S post of the alternator and the S terminal of the regulator. The regulator needs this signal to shut off the ALT light.

Report your results.
 
Reply
Old Nov 28, 2012 | 12:09 PM
  #3  
docholy45's Avatar
docholy45
Thread Starter
|
New User
Joined: Nov 2012
Posts: 4
Likes: 0
alt lite

checked everything as told lite still on
 
Reply
Old Nov 28, 2012 | 12:15 PM
  #4  
fmc400's Avatar
fmc400
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Club FTE Gold Member
Originally Posted by docholy45
checked everything as told lite still on
I don't understand. The first instruction was to make sure the ALT light goes from ON to OFF if you unplug the regulator. You are saying the light is "still on;" I'm not sure to what that applies. What were your exact results of the first experiement?
 
Reply
Old Nov 28, 2012 | 02:36 PM
  #5  
docholy45's Avatar
docholy45
Thread Starter
|
New User
Joined: Nov 2012
Posts: 4
Likes: 0
alt lite goes out with volt reg unplugged have a goodconnection between s post on alt and reg lite is still on meter shows charge at13.88
 
Reply
Old Nov 28, 2012 | 05:28 PM
  #6  
fmc400's Avatar
fmc400
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Club FTE Gold Member
Thank you for the clarification. The only explanation for this is a faulty voltage regulator.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Damifiknow
1973 - 1979 F-100 & Larger F-Series Trucks
6
Aug 14, 2015 03:50 PM
valley1221
1973 - 1979 F-100 & Larger F-Series Trucks
7
Apr 25, 2013 09:21 PM
Schuyles
1961 - 1966 F-100 & Larger F-Series Trucks
9
May 27, 2011 05:28 PM
Larry85355
1973 - 1979 F-100 & Larger F-Series Trucks
4
Nov 13, 2008 04:28 PM
ken's 80
Electrical Systems/Wiring
3
Sep 2, 2008 05:51 PM




All times are GMT -5. The time now is 02:58 PM.

story-0
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-1
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-2
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-3
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-4
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-5
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-6
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-7
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-8
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-9
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

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


VIEW MORE