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

Need Help Engine Compartment Wires

Thread Tools
 
Search this Thread
 
Old Mar 17, 2024 | 11:23 AM
  #1  
Deadbuck's Avatar
Deadbuck
Thread Starter
|
Tuned
5 Year Member
Liked
Joined: Apr 2018
Posts: 286
Likes: 40
Need Help Engine Compartment Wires

1977 F-250 4x4 with Factory AC - Need help identifying these wires that go to nowhere in the engine compartment. See pics. Any help is appreciated. There are a bunch of empty wires behind the dash too. Not sure how to identify all of them. Thanks

 
Reply
Old Mar 17, 2024 | 05:10 PM
  #2  
77&79F250's Avatar
77&79F250
Moderator & parts slinger
Veteran: Army
15 Year Member
Community Builder
Liked
Joined: Feb 2007
Posts: 50,260
Likes: 5,819
From: S/W Missouri, Polk county
Club FTE Gold Member
Elec diagrams start here. https://www.ford-trucks.com/forums/1...l#post14696846
 
Reply
Old Mar 18, 2024 | 12:56 PM
  #3  
Deadbuck's Avatar
Deadbuck
Thread Starter
|
Tuned
5 Year Member
Liked
Joined: Apr 2018
Posts: 286
Likes: 40
Originally Posted by 77&79F250
Upon further review there are loose or disconnected wires and plugs everywhere. Is this normal as in a standard wiring harness for every option and then only certain ones are plugged it or connected? As an example the ash tray light and glove box light weren’t in place but the harness had the wires for them. Once I purchased them and connected to the harness they work.

so are all of these other empty wires for different options? If so is there a wiring diagram for the engine compartment harness? Thanks
 
Reply
Old Mar 18, 2024 | 01:25 PM
  #4  
Drivewayfabricator's Avatar
Drivewayfabricator
Cross-Country
Joined: Mar 2024
Posts: 67
Likes: 38
I believe the red with blue stripe near the solenoid is the original start wire. Looks like someone has a new wire on a loop terminal in its place. Did they bypass a neutral safety switch maybe? Not sure why they would need to run a new wire up there.
 
Reply
Old Mar 18, 2024 | 01:53 PM
  #5  
77&79F250's Avatar
77&79F250
Moderator & parts slinger
Veteran: Army
15 Year Member
Community Builder
Liked
Joined: Feb 2007
Posts: 50,260
Likes: 5,819
From: S/W Missouri, Polk county
Club FTE Gold Member
Normal to have chaos behind the dash yes, factory maybe yes maybe no, I do not know for sure. I know that there is a difference in a 4 gauge or 2 gauge 2 warning light (on the instrument cluster) wiring harness. And a/c or not....I have not see a either or plug back there.




 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
GGALLIN1776
1999 - 2016 Super Duty
6
May 2, 2023 09:53 AM
fpt2
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
4
Nov 7, 2022 05:38 AM
Dieseloholic1
1987 - 1996 F150 & Larger F-Series Trucks
4
Nov 23, 2020 03:45 PM
maltesecross
6.7L Power Stroke Diesel
1
Jan 13, 2013 09:34 PM
drizzie27
1967 - 1972 F-100 & Larger F-Series Trucks
6
Mar 28, 2012 06:08 PM




All times are GMT -5. The time now is 03:38 AM.

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