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

78 f150 wiring diagram

Thread Tools
 
Search this Thread
 
  #1  
Old 04-23-2007, 06:58 AM
dilbone56's Avatar
dilbone56
dilbone56 is offline
Freshman User
Thread Starter
Join Date: Aug 2004
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
78 f150 wiring diagram

Hey guys, been a while since my last post. I appreciate all the help you all give. I've been dealing with a crumbling instrument cluster housing, and a bad printed circuit. Since the cost is comparible I've decided to go aftermarket with all of my gauges. The only problem is that every wiring diagram I've found for this truck show 13 pins on the connector to the instrument cluster. My truck has 14 pins. Some of the pins have two wires going into the connector as well. So far I've been able to determine the water temperature, oil pressure, fuel level, and a few others by simply looking at diagrams for wire color and testing for continuity between connector and sender. The only problem is that I can't figure out what some of these wires are for, and as I said the diagrams don't have the same connector I do. If anybody knows where I can find a different diagram that might help I would greatly appreciate it. Thanks
 
  #2  
Old 04-23-2007, 05:43 PM
bucks77ford's Avatar
bucks77ford
bucks77ford is offline
Post Fiend
Join Date: Jan 2006
Location: Kasson, Minnesota
Posts: 5,037
Likes: 0
Received 8 Likes on 8 Posts
What are the colors of the two wires you are trying to figure out?
 
  #3  
Old 04-23-2007, 05:50 PM
1975Ford's Avatar
1975Ford
1975Ford is offline
Postmaster
Join Date: Jul 2005
Posts: 3,248
Likes: 0
Received 0 Likes on 0 Posts
dilbone56, welcome to FTE
 

Last edited by 1975Ford; 04-23-2007 at 06:05 PM.
  #4  
Old 04-24-2007, 12:00 AM
Mil1ion's Avatar
Mil1ion
Mil1ion is offline
New User
Join Date: Jan 2008
Posts: 0
Likes: 0
Received 11 Likes on 11 Posts
14 Pins are warning lights

18 Pins are Gauges.

Ford Wiring is colour coded for certain systems and is used for decades with new additions.

I think I can help.


Click on Figure #3 on this page.

http://www.autozone.com/az/cds/en_us...rInfoPages.htm
 

Last edited by Mil1ion; 04-24-2007 at 12:05 AM.
  #5  
Old 04-24-2007, 06:47 PM
dilbone56's Avatar
dilbone56
dilbone56 is offline
Freshman User
Thread Starter
Join Date: Aug 2004
Posts: 41
Likes: 0
Received 0 Likes on 0 Posts
Here is the pin layout w/ color and description of the wires I know (or at least think I know)

1. black 8. red/white (coolant temperature)
2. white/red 9. white/blue (rt. ft. dir. light)
3. green/red (goes to ignition module) 10. green/black (high beams)
black (resistance) 11. purple/white (low brake light switch)
4. black/green 12. white/red (oil pressure)
5. green/white (left front dir. light) 13. red/yellow (to ignition module)
6. black/green 14. orange (fuel gauge)
black
7. pink
 
  #6  
Old 04-24-2007, 10:07 PM
Torque1st's Avatar
Torque1st
Torque1st is offline
Posting Legend
Join Date: Sep 2001
Posts: 30,255
Likes: 0
Received 26 Likes on 26 Posts
An entire instrument cluster can be had for $20 at most junkyards or from eBay. Instrument clusters can be used clear up into the 80's from Vans. Much much cheaper and a whole lot less time & trouble than trying to go custom.

The wires on the flex circuit are incredibly easy to trace to identify the pinout. Look to your plug for the colors.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
nmto0777
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
8
11-07-2015 10:59 AM
tbruz
1973 - 1979 F-100 & Larger F-Series Trucks
4
07-08-2015 12:46 PM
TJEli
1999 to 2016 Super Duty
21
10-07-2014 05:22 PM
jdschall
1983 - 2012 Ranger & B-Series
12
05-28-2004 03:41 PM



Quick Reply: 78 f150 wiring diagram



All times are GMT -5. The time now is 07:36 AM.