Notices
1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

voltage drop

Thread Tools
 
Search this Thread
 
Old Sep 30, 2014 | 06:19 PM
  #1  
quincyj34's Avatar
quincyj34
Thread Starter
|
Senior User
Joined: Nov 2012
Posts: 196
Likes: 0
voltage drop

I'm hoping someone can help me with this. I've been getting some voltage drop when I roll down the windows on my truck. I have already done the 3g swap and I know it seems like a bad voltage regulator but its new and so are the brushes. I know the battery is good because I test it every so often to see where its at. I have 2g wire running down to the starter and 0g from the battery to alt. The smallest wire is the ground which is the stock one with no bare wire showing or anything. Could that small ground be my problem, or would adding a ground wire to the body of the alternator help?
 
Reply
Old Sep 30, 2014 | 07:30 PM
  #2  
ArdWrknTrk's Avatar
ArdWrknTrk
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 40
From: EXTREME southwest CT
Club FTE Silver Member

I'd imagine it is just the harness going to the cab or from the ignition switch to the fuseblock if it is wired that way.
Electric window motors draw substantial current and if the window runs or regulator arms are sticky they will draw even more.

Where do you think your voltmeter is getting it's reading from?
Do you see any drop at the battery while running the window up and down?

Check the braided cab grounds from the pinch welds below the door sill to the cab support of the frame by the foot box.
these get corroded all the time.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Nice Work Truck
6.0L Power Stroke Diesel
6
Apr 12, 2012 01:56 PM
bigford250
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
4
Nov 8, 2007 05:06 AM
chicowoodhill
1948 - 1956 F1, F100 & Larger F-Series Trucks
11
Dec 5, 2006 11:40 AM
gregover
Electrical Systems/Wiring
6
Nov 15, 2003 11:15 AM
elstx
1967 - 1972 F-100 & Larger F-Series Trucks
4
Oct 15, 2003 06:58 PM




All times are GMT -5. The time now is 08:56 PM.

story-0
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.

By Verdad Gallardo | 2026-06-12 11:01:55


VIEW MORE
story-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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