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1968 FORD ignition wiring diagram for f-100

Wires have been cut & spliced back together need to know color codes from switch to starter

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Follow the link for wiring diagrams for this truck. Ford Truck Technical Drawings and Schematics Section Wiring Diagrams

Posted on Dec 27, 2016


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Posted on Jan 02, 2017


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Does anybody know where I can find a color coded wiring diagram for a 1983 Ford F-100 or 150?

Try a library for a repair manual. That may not help, pretty hard to find fuse block wiring off a diagram. Find this truck at a salvage yard, take the fuse block off with wires cut way back so you can see color of the wires.

Apr 01, 2016 | 1983 Ford F150

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How to bypass an immobiliser

This car doesn't have a factory alarm / immobiliser, so normally you look for the control unit, if its hidden then look for the siren and follow the wires to get to the control box, now you have to follow the wiring to see where they have spliced into the car's own wiring, etc, the ignition switch wiring is normally interupted to provide a live feed to the control box and also the starter circuit is spliced to stop the car's starter motor from working, basically follow the alarm control wiring back to where it attache's to the car's own wiring and take of the alarm control unit's wiring and rejoin the car's own wiring together, ie the starter circuit maybe mauve with a black trace, you may find its been cut and 2 other wire's run from them, take off the 2 wire's and join the mauve /black trace back together , and so on, good luck.

Aug 07, 2014 | 1980 Austin Mini Metro

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Wireing harnes astro steering wheel

go to your public library and go on line.

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I need a colored wiring diagram fof a 1968 ford f-100

Haynes or Chilton manual should have the wiring diagrams. Your local library might have the right repair manual where you could make copies of the wiring.
No such thing as a colored diagram, but any wiring diagram would have all the wires color-coded.
Good luck. The wiring on your '68 would be super-simple compared to today's vehicles.

Nov 10, 2011 | Cars & Trucks

1 Answer

I have a 70 F 100 that im wanting to put the ignition system and motor out of a 76 in to it. im having problem figuring what color wires i need to splice the red and the white wire in to. or i would like...

Put the red wire to the ignition on, and white to ignition start, You can place the red wire on the opposite side of the battery on the starter solenoid and the white on the igition terminal on the starter solenoid.

Jun 19, 2011 | Ford F-100 Cars & Trucks

1 Answer

I would like to remove the ALA990K ignition disabler from my 2001 Saturn SL. It is not functioning correctly and I having a hard time starting the car after entering personal code. Since all Saturn...

The wires from the ignition switch probably has this spliced into them. Remove/cut ALA990k out of harness and match the same color wires and splice them back together.

Aug 19, 2017 | 2001 Saturn L-Series

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I have a ford F-250 super duty 4x4 diesel, recently the bolts holding the front drive shaft came out and the drive shaft hit the wiring harness running right beside it. Cutting all 25 or so wires, I...

I don't know what year your truck is but most 4wd engagement are controlled by the computer--take to advance auto have them put it on the computer to check system codes--you may have another issue arise do to the wiring being shorted when they were cut.

Jun 11, 2017 | 2004 Ford F250

1 Answer


I've ran into this problem myself, if you're not confident with doing some wiring you probably should not be doing this. This will probably take 1 to 3 hours to do this. If you can get a wiring diagram that showed how the alarm was originally installed. If not find the alarm probably underneath the dashboard, the alarm wires will problem be smaller than a wiring that is in your car. When removing the alarm think of it as this way, someone cut into the middle of your wiring harness and put a alarm in. Would you need to do is remove the alarm and splice the cut wires back together. Instead of removing the alarm all at once try disconnecting one wire in a time and finding its mate. The wires or color coded. For example, black with an orange tracer. This would mean it's a black wire with an orange line on it. If you're not sure look at a wiring diagram splicing the wrong wires together could cause your car not to function properly or damage it. Before you start this make sure you disconnect the battery also. Good luck.

Jul 18, 2010 | 1998 Ford Mustang

4 Answers

Disabling PassTime device on 03 Ford F150

Find the passtime device , it's usually under the dash near the ignition switch. You can trace it by following the wire from the remote eye. There are 5 wires with a plug connector plugged into the device. Leave the red, pink and black wires alone. The blue wire comes from your ignition switch and goes to a relay switch inside the device. The purple wire comes from that switch to your starter.
Leave them cut from the device, but solder, (or connect in some manner) them together so that the passtime device is bypassed. Then your starter will get power when you turn the key. That's all there is to it.
the passtime device will still appear to be functioning. It will beep and take codes from the remote, but regardless of whether it is timed out or not your starter will still get power.


It should be noted that the passtime system is property of the dealership and removal of this device may violate your contract with the dealership and in some states is a punishable offense.

Mar 27, 2009 | 1993 Ford Festiva

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