Engine won't start

No start condition:

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it

Hi:
If it doesn't start with starting fluid, chances are your original guess is correct, no spark. However, many things could cause it. Most commonly is the the crankshaft position sensor. Was the check engine light on prior to the problem?

This may be one of hte trucks that has a fuel pump harness problem. You are withing the range of years that this happened. You needed to replace the last foot of harness and the connector is different. Check your fuel pressure though as it can be a fuel regulator or the pressure may be low. It should be at least 55 psi.

Make sure the battery has a full charge and connections are good. Have a helper crank it, while you visually check for spark at the spark plugs. If you think there may be a problem with feed to ignition switch, that is two red wires, hot all the time, protected by maxi fuse 5 and maxi fuse 6 under the hood, fuse box. As far as the basics, make sure you have good spark and good fuel pressure. With multiple issues, I pick one circuit and backtrack.

Hey pancake,
Do you have any way to check fuel pressure?

Chris

If the chime doesn't have anything to do with ignition switch, then I don't about the chime. Keep your attitude to yourself.

Use a gage and check fuel pressure. I'm not a chime expert. Have a good day.

For testing electrical circuits, the minimum you need would be a test lamp which could be easily obtained from any parts store. Without any diagnostics tools, some diagnostic procedures cannot be performed and you are not going anywhere.

At the ignition switch, test for voltage at the Pink wire with ignition switch turned to ON and while cranking. If voltage is not available, the ignition switch is bad, unless both red wires does not have voltage as well, then JDL has mentioned the fuses to check. When power supply is interrupted, the chime would not work so a faulty ignition switch fits into it.

Forsman is correct about knocking some wires looe so it is not going to be easy except if you feel that it is related to the work you did, you have to back track and recheck connections.

For wiring circuits, I have attached the engine control wiring schematics. Had to break them up as the complete diagram is too small to be ligible. Hope it is helpful.

Matbe or fuel pressure to high or leaking injectors. Unplug MAF see if it corrects problem. Have you checked for codes?