The truck will crank but will not start. There is no spark?

Hello,

This sounds like the PCM relay is not working. Here is a guide to help you test it and the location of the relay #4. Also, I found the engine wiring diagrams so you can see how the system works.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

When you turn the key to the on position without cranking the engine over can you hear the fuel pump run in the tank for 5 seconds?

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run down this guide and report back. Check out the diagrams (below). Please run this test and get back to us.

PCM was shorting when it was damp out. Put in new PCM cars fine now. Thank you

Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.

Cheers, Ken