Wiring diagram for a 91 F250 Diesel?

Thread Tools
 
Search this Thread
 
  #1  
Old 09-06-2008, 08:35 PM
archangel's Avatar
archangel
archangel is offline
Posting Guru
Thread Starter
Join Date: May 2003
Location: Joliet, Illinois
Posts: 1,242
Likes: 0
Received 2 Likes on 2 Posts
Wiring diagram for a 91 F250 Diesel?

I need to locate the starter power/activation wire from under the dash that comes from the ignition.

A color would work if I went off the steering column, but a harness location would be great if I could get it somewhere easier to access.
 
  #2  
Old 09-07-2008, 01:01 AM
quaddriver's Avatar
quaddriver
quaddriver is offline
Cargo Master
Join Date: Jan 2004
Location: Cook Forest and Irwin PA
Posts: 2,500
Likes: 0
Received 1 Like on 1 Post
If ya can wait till tomorrow night when I get back, I can look it up
 
  #3  
Old 09-07-2008, 06:00 AM
subford's Avatar
subford
subford is offline
Fleet Owner
Join Date: Aug 2005
Location: Easton,Ks
Posts: 23,602
Likes: 0
Received 225 Likes on 176 Posts
Originally Posted by archangel
I need to locate the starter power/activation wire from under the dash that comes from the ignition.

A color would work if I went off the steering column, but a harness location would be great if I could get it somewhere easier to access.
The wire color is a RED wire with a Blue stripe on it.

You can find it at the Clutch Interlock Switch/Jumper under the dash on the drivers side.
 
  #4  
Old 09-07-2008, 08:07 AM
Franklin2's Avatar
Franklin2
Franklin2 is offline
Moderator
Join Date: Jan 2001
Location: Virginia
Posts: 53,583
Likes: 0
Received 1,661 Likes on 1,343 Posts
I am guessing you will have the jumper, since you have a auto tranny. It leaves the ignition switch on the bottom of the column, and makes it's way through the jumper to the firewall, and then down to the side of the tranny to the neutral safety switch. It then makes it's way back up and over to the starter relay(solenoid) on the fender. The whole time it stays the same color.
 
  #5  
Old 09-07-2008, 09:52 AM
archangel's Avatar
archangel
archangel is offline
Posting Guru
Thread Starter
Join Date: May 2003
Location: Joliet, Illinois
Posts: 1,242
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by subford
The wire color is a RED wire with a Blue stripe on it.

You can find it at the Clutch Interlock Switch/Jumper under the dash on the drivers side.
Originally Posted by Franklin2
I am guessing you will have the jumper, since you have a auto tranny. It leaves the ignition switch on the bottom of the column, and makes it's way through the jumper to the firewall, and then down to the side of the tranny to the neutral safety switch. It then makes it's way back up and over to the starter relay(solenoid) on the fender. The whole time it stays the same color.
So, I'm looking on, or close to, the firewall, near where the clutch would be for a connector with a Red wire with a Blue stripe that when unplugged the starter will not work.

First I'll pull the plug, then I try it with the one wire snipped.

But I need it to start in gear, so if I supply 12V to the Red wire with a Blue stripe from that comes from that connector, but after the neutral safety switch, the starter will turn over even if it's in gear?

I guess I should just go to the shifter selector/neutral safety switch and look for it there.

Thanks guys, I'll give it a look and see if I can find it.

FYI I need to kill and restart the engine engine while it is still in gear.
I have the fuel pump solenoid (on/off) already wired to a switch in the dash and the starter button just needs to be wired in.
 
  #6  
Old 09-07-2008, 02:01 PM
Franklin2's Avatar
Franklin2
Franklin2 is offline
Moderator
Join Date: Jan 2001
Location: Virginia
Posts: 53,583
Likes: 0
Received 1,661 Likes on 1,343 Posts
If you want to disable the park/neutral safety switch function, the best way is to get to the connector under the truck that goes to the switch on the side of the tranny, and jump or twist the two red/blue wires together. If you have other wires going there, make sure not to disturb them, since they go to the reverse lights.
 
  #7  
Old 09-07-2008, 02:57 PM
archangel's Avatar
archangel
archangel is offline
Posting Guru
Thread Starter
Join Date: May 2003
Location: Joliet, Illinois
Posts: 1,242
Likes: 0
Received 2 Likes on 2 Posts
I only want it disabled when I push a remote starter button, otherwise I would rather it remain functional like the injector pump, it works like normal with the key, until the switch is pushed in to kill it.

My intent is to try and get up over 20 mpg city and 30 freeway, so when I pull the mirrors, make the curved bed cover and install the HHO generator, I just might do it.

Right now as the truck is set up, the best was 19 city and 24 freeway, but I don't always kill the engine at red lights.

I still have to install the Smack HHO generator and test the mileage improvements compared to my recent reading as the next step, then I get serious about the aerodynamic modifications.
 
  #8  
Old 09-07-2008, 09:31 PM
archangel's Avatar
archangel
archangel is offline
Posting Guru
Thread Starter
Join Date: May 2003
Location: Joliet, Illinois
Posts: 1,242
Likes: 0
Received 2 Likes on 2 Posts
Well I found that the red with a blue strip wire in the middle one of three connectors clustered above the drivers side front wheel right by the fire wall and steering column and it was after the neutral safety switch going straight to the starter.

I wired the remote starter power through the injector pump kill switch, and that gets it's power from the key on power to the original pump wiring, so the ignition and the kill switch both have to be in the on position for the remote starter to work.

I am now all hooked up!

Thanks guys!
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
fixnair
1999 to 2016 Super Duty
4
06-06-2015 10:57 PM
Auburn_in
Excursion - King of SUVs
3
01-16-2013 11:57 AM
Shortlineent
1999 to 2016 Super Duty
6
08-23-2009 09:26 PM
79f150toy
1973 - 1979 F-100 & Larger F-Series Trucks
10
01-22-2009 11:39 AM
metalZ
Electrical Systems/Wiring
5
04-10-2007 05:19 PM



Quick Reply: Wiring diagram for a 91 F250 Diesel?



All times are GMT -5. The time now is 04:26 PM.