Are the glow plugs single or dual wire if they are twin or dual wire one wire is positive and one is negative. I will base this on twin wire
I hope it is a negative earth system as I won't bother with positive earth instructions at this stage.
Get a multi-meter that has alligator clips on the cables attach black to a good ground then with the solenoid power wire removed on the starter (so it wont crank) get someone to hold the ignition switch in the on position, then test each pair of wires one will show voltage this is the positive one (mark each positive wire) now release the starter switch and change the multi-meter to ohms test the wires that did not show as active they should show good low resistance (hopefully 0) connection. now you can reinstall the glow plugs making sure positive on the glow plugs is paired with active positive wires that were marked then attach ground wires to the glow plugs.
Reattach the solenoid power wire and try starting it
SOURCE: ignition wiring
1991-1994 2.9L and 3.0L Engines Firing Order 1-4-2-5-3-6
1995 And Later 3.0L V-6 With DIS Ignition System Firing Order 1-4-2-5-3-6
4.0L Engines Firing Order: 1-4-2-5-3-6 DIS Ignition System
SOURCE: 87 regal ignition switch wiring diagram
Thick wires at IGN SW .... Red(s) - supply power from the battery to the IGN switch ... Pink - ignition supply ... Orange - Accessory power ... Purple most RWD sometimes (Yellow most FWD) - Starter .. Did I miss any? It's been a while The thin wires on the IGN swich are for key sense and VATS (if applicable)
SOURCE: need wiring diagram for 1990 ford f-250 4x4
If you are looking for a complete wiring harness diagram then faxonautoliterature has the original Ford service manual for your truck which has complete diagrams in it. If you are looking for components to check then Haynes Diesel Engine Repair Manual, part # 10330 has good diagrams of components and terminals pinpointed for testing purposes as well as the specs for those tests and a good diagnostic section. Hope this helps.
SOURCE: need spark plug wiring diagram for 1965 ford
Try this. If the distributor is in the right way, the clips that hold the cap on should be just a hair off of 12 o'clock and 6 o'clock. #1 is positioned at 1 o'clock, which is at the firewall side of the distributor. The firing order is 1-5-4-2-6-3-7-8and is counterclockwise from #1. The passenger's side is cylinders 1-2-3-4, from the front of the car. The driver's side is 5-6-7-8 from the front. Hope this will help.
SOURCE: need a wiring diagram for
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