Truck Stalls - no power at ignition

[Posted]

Posting this here to see if I get a few replies. Truck runs perfect. Pull out of the garage let it run and it dies like someone turned the key off. Just finished the build. 2nd time this happened. Last time I changed the battery, check neutral safety plug, and checked and retightened all wiring to starter. Then it ran.

This time I looked at the coil wires and touched to see if they are tight, checked alternator wires. Put truck in and out of gear. A minute or two of this and it started. I had to leave so I drove it back in the garage. I think I have a ground issue on dash harness. I may not of grounded good enough. Other ideas welcomed.