I replaced my starter with a new one from car quest yesterday, it was starting to turn the engine over slow. I checked the batteries, they were fine, so went for a new starter. After installing, the new starter turned fast and fine, started the truck ok, but I noticed a fast clicking sound from under the dash. Ran it home and tried to start it up this morning, turns over fast, the clicking sound is still coming from under the dash, but the engine won't fire. Just turns over. When it's turning over the check engine (and all the other dash) lights flash.
Anyone have a suggestion?

 

I figured this one out. Cleaned and tightened my battery connections. That was the problem. I wasn't getting enough voltage, thus the clicking relays and no start.

 

Thank you for posting up what you found and I am always thankful for the easy fixes...

 

BRAVO !!!!