Notices
1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

electrical issue

Thread Tools
 
Search this Thread
 
Old Dec 19, 2017 | 11:28 AM
  #31  
red66rider's Avatar
red66rider
Thread Starter
|
Senior User
Joined: Jun 2015
Posts: 351
Likes: 0
From: Jax
Originally Posted by Tedster9
Yep, give 'em a twist and pull, but don't get in a hurry about it. The pins may be welded to the sockets by corrosion. Let the penetrating oil do its job.
sounds like fun lol
 
Reply
Old Dec 19, 2017 | 01:00 PM
  #32  
Jolly Roger Joe's Avatar
Jolly Roger Joe
Lead Driver
Joined: Jul 2011
Posts: 6,599
Likes: 34
From: Rockingham, VA
In looking at the wiring diagram link in post #5 by AZ66F100, I don't see how the headlights can be affected by a bad ignition switch.

Wire number 37 (black with yellow stripe) off the hot side of the starter relay provides power to a junction with wire 21A (yellow, B for Battery on the ignition switch) and wire 25 (black with orange stripe, power to the light switch). So, the lights should work even if the ignition switch is bad.
 
Reply
Old Dec 19, 2017 | 01:13 PM
  #33  
Jolly Roger Joe's Avatar
Jolly Roger Joe
Lead Driver
Joined: Jul 2011
Posts: 6,599
Likes: 34
From: Rockingham, VA
Originally Posted by red66rider
Any tips on removing these cables?
Since you don't have lights either, your problem may be in that 8-pin connector. The black wire with yellow stripe from the starter relay is in that connector. It provides power to both the ignition switch and light switch.

But that power wire goes from that connector to a junction (somewhere) with 5 wires in it, the black with yellow, a black with orange, 2 yellow and one red. I have no idea what it looks like or where it is located under the dash.
 
Reply
Old Dec 19, 2017 | 01:37 PM
  #34  
red66rider's Avatar
red66rider
Thread Starter
|
Senior User
Joined: Jun 2015
Posts: 351
Likes: 0
From: Jax
Originally Posted by Jolly Roger Joe
In looking at the wiring diagram link in post #5 by AZ66F100, I don't see how the headlights can be affected by a bad ignition switch.

Wire number 37 (black with yellow stripe) off the hot side of the starter relay provides power to a junction with wire 21A (yellow, B for Battery on the ignition switch) and wire 25 (black with orange stripe, power to the light switch). So, the lights should work even if the ignition switch is bad.

yeah I think I have narrowed it down to being the pin connection..... have replaced everything under the hood electrical wires other than the wires, checked the grounds and cleaned them up, so the only thing I haven't touched is the pin connector since I wasn't sure how it came apart, plus it being really dirty etc.



im just hoping one day I go out there and everything works lol
 
Reply
Old Dec 19, 2017 | 06:05 PM
  #35  
red66rider's Avatar
red66rider
Thread Starter
|
Senior User
Joined: Jun 2015
Posts: 351
Likes: 0
From: Jax
Originally Posted by Crop Duster
You don't have the type of dash panel that has those gauges so you don't have to worry about that.
Where is that black an yellow wire connected on your fender apron? You should have a junction block with the alternator wire and that blk/yel wire and a short jumper wire to the Bat side of your starter relay. Make sure you have a good connection there. I'm going to post a picture of my fender apron and I hope it doesn't confuse things. I have the oil an amp gauges so there is a harness on mine that you don't have. But imagine that Black/red wire going to that junction block instead of that circuit breaker. that is what your wiring should look like.
Here is what mine looks like... not as clean as yours lol
 
Attached Images  
Reply
Old Dec 19, 2017 | 06:47 PM
  #36  
Roadwarrior211's Avatar
Roadwarrior211
New User
Joined: Dec 2016
Posts: 14
Likes: 0
From: oklahoma
Might try probing the yellow and black wire to where it meets a junction, if it has power to the junction, but not after, could you run a battery jumper to there to see if lights and gauges work?
 
Reply
Old Dec 20, 2017 | 07:08 AM
  #37  
Jolly Roger Joe's Avatar
Jolly Roger Joe
Lead Driver
Joined: Jul 2011
Posts: 6,599
Likes: 34
From: Rockingham, VA
Originally Posted by red66rider
yeah I think I have narrowed it down to being the pin connection..... have replaced everything under the hood electrical wires other than the wires, checked the grounds and cleaned them up, so the only thing I haven't touched is the pin connector since I wasn't sure how it came apart, plus it being really dirty etc.



im just hoping one day I go out there and everything works lol
OK, so I see both connectors there have a black with yellow stripe wire in them. The wiring diagram shows the wire you're chasing in the connector with 9 wires into 8 pins on the engine side. The other connector has only 7 pins with 7 wires on the engine side.

I believe from your pics the lower connector is the one you want to open up. But since it will be harder to get to, I'm betting the problem is with the junction under the dash.
 
Reply
Old Dec 20, 2017 | 09:59 AM
  #38  
red66rider's Avatar
red66rider
Thread Starter
|
Senior User
Joined: Jun 2015
Posts: 351
Likes: 0
From: Jax
Originally Posted by Jolly Roger Joe

I believe from your pics the lower connector is the one you want to open up. But since it will be harder to get to, I'm betting the problem is with the junction under the dash.
Don't you put that voodoo on me Ricky Bobby! lol


im going to try the penatrating oil method tonight... let the oil sit over night and tomorrow after i get off work try and slowly pry it apart to see what i am dealing with. hopefully i can succeed in getting the two apart.


as far as the connecting disconnecting, does it disconnect right at the firewall or is the connecter shown, 2 pieces where the female side sticks out some from the firewall with the male side plugging into it?









i am determine to get this truck running again, if not will be selling lol
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Fords at 2026 Carlisle Ford Nationals

 Joe Kucinski
story-1

3 Best / 3 Worst Parts of Modern Ford Ownership

 Brett Foote
story-2

10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

 Pouria Savadkouei
story-3

Every 2026 Ford Engine Explained

 Brett Foote
story-4

10 Ugly Ford Trucks That We Still Kinda Love

 Joe Kucinski
story-5

10 Things Every Truck Owner NEEDS (2026 Edition)

 Michael S. Palmer
story-6

Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

 Verdad Gallardo
story-7

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

 Joe Kucinski
story-8

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

 Brett Foote
story-9

Top 10 Ford Truck Tragedies

 Joe Kucinski
Old Dec 20, 2017 | 10:10 AM
  #39  
Jolly Roger Joe's Avatar
Jolly Roger Joe
Lead Driver
Joined: Jul 2011
Posts: 6,599
Likes: 34
From: Rockingham, VA
Originally Posted by red66rider
as far as the connecting disconnecting, does it disconnect right at the firewall or is the connecter shown, 2 pieces where the female side sticks out some from the firewall with the male side plugging into it?



i am determine to get this truck running again, if not will be selling lol
Don't sell it because of this little setback... Like most problems on older vehicles, the answer is simple once you know what it is.

Both of those connectors pull apart from the engine side of the firewall. One half stays plugged into the firewall. I haven't pulled mine apart, so I have no idea which side is male and which is female.
 
Reply
Old Dec 24, 2017 | 10:03 PM
  #40  
red66rider's Avatar
red66rider
Thread Starter
|
Senior User
Joined: Jun 2015
Posts: 351
Likes: 0
From: Jax
Well have some news..... truck is running and have lights and all. Issue ended up being the main black wire. At the connection at the wall it had some corrosion. Took some sandpaper to clean them up and boom it works lol.
 
Reply
Old Dec 25, 2017 | 06:04 AM
  #41  
Jolly Roger Joe's Avatar
Jolly Roger Joe
Lead Driver
Joined: Jul 2011
Posts: 6,599
Likes: 34
From: Rockingham, VA
Originally Posted by red66rider
Well have some news..... truck is running and have lights and all. Issue ended up being the main black wire. At the connection at the wall it had some corrosion. Took some sandpaper to clean them up and boom it works lol.
Great news! Glad you got it fixed.

When you say the "main black wire", do you mean black with yellow stripe? The one going into the 8-pin connector at the firewall?
 
Reply
Old Dec 25, 2017 | 09:10 PM
  #42  
red66rider's Avatar
red66rider
Thread Starter
|
Senior User
Joined: Jun 2015
Posts: 351
Likes: 0
From: Jax
Originally Posted by Jolly Roger Joe
Great news! Glad you got it fixed.

When you say the "main black wire", do you mean black with yellow stripe? The one going into the 8-pin connector at the firewall?
yes that black wire with yellow stripe
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
DBrawley
1957 - 1960 F100 & Larger F-Series Trucks
13
Jan 8, 2018 11:59 PM
jhaas63
1948 - 1956 F1, F100 & Larger F-Series Trucks
7
Jul 29, 2013 04:02 AM
732t37
1987 - 1996 F150 & Larger F-Series Trucks
8
Dec 11, 2011 05:15 PM
v8xploder
1966 - 1977 Early Broncos
8
Oct 22, 2006 08:33 PM
93 r1
1987 - 1996 F150 & Larger F-Series Trucks
25
Jun 18, 2003 05:33 PM




All times are GMT -5. The time now is 05:52 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