I do my best to try and figure what I can without asking others for help but I'm stumped on this one, trucks been starting fine, went to the store, came back truck wont start, figured just a starter, a few years old. Replaced it, still no start. Started chasing wires power to the starter but nothing to solenoid 5v wire with key cycled to the start position. Pulled the relay. I have no constant power to pin 30. Dont know if there should or shouldn't be, all the other relays have power on 30. If I jump power from pin 86 to 87 and crank the key it fires right up, the list of things I have tried goes as followed. Jumped the clutch pedal safety switch. Checked every last fuse and relay, tried three brand new relays in the starter relay spot, all relays click. The only thing I'm not sure about is if the ignition switch supplies power to pin 30 in the relay, or if the main fuse going into the panel supplies power to pin 30, any input would be greatly appreciated 

Others will be chiming in soon, but meanwhile no one can guess what you are driving, so please give some information about your truck. 

 

Do you have a service manual or an electrical diagram to work from?

 

- John

Sorry about that.. its a 99 ecsb, I believe I found the issue with a 30 ampignition run fuse under the hood, was getting power on both sides but after I pulled the cap to the fuse I could visibly see it was blown, must have just barely been connecting to get power when i used a probe to check it! 

Yeah... I've seen fuses cool and make contact. The put them in service and the normal load will make it open. Typically you would run it till fails them test. The it will show as a failed fuse.

What caused the 30 amp fuse to blow?  Is your truck back to starting normally now?

 

- John

Some times fuse get old and crack. There isn't any electrical issues but the risible link oxidizes then breaks from age and vibration.

Exactly as @Mopar1973Man has said, nothing was blown and every wire ohmed out well, I was stumped with it, read some past forums and decided to start pulling fuses and ohm test each one, thankfully it was only the #2 and quickly found, it didn't have any charring like it actually blew, it just got old and cracked, perks of a 20 year old truck! Smh... Also, glad to hear the surgery went well and best wishes on upcoming events. Hope everything goes as well as the first! 

@Tractorman the truck is back to normal by the way, as soon as it was replaced it started right up!