http://www.ford-trucks.com/forums/89...ontroller.html Have a read through this thread. Look for the post by Dave Sponaugle on how the system operates.
Also go on down the main forum page to the diesel section and have a read through the pre-power stroke page. You may get a better response to any diesel questions there.
I have solved the glow plug problem. Now we have a new one. This truck belongs to my granddaughter and she purchased it to pull her stock trailer. she is in 4H (big time!!). The head lights and running lights seem to work properly. However, she has no turn signals, front or back, no dash lights, no hazard flashers, and no brake lights. We have checked all fuses, and the brake light switch on the brake pedal has power and does switch the power when the pedal is depressed. I am trying to gain access to the turn signal switch in the column for testing. How do I get the ignition switch bezel off. and does anyone have a schematic of this wiring so that I can print it out?? Also any advise wpould be greatly appreciated. Roger <firstname.lastname@example.org>