WTF! SCT loaded

[Nucdancer01]

Loaded tune last night.

Truck horn went off this morning like alarm was going off. I get in the truck and when I turn the key on, the gauges do a sweep like I'm calibrating the instrument cluster.

I try to start and nothing.

Instrument cluster says HR3457

I returned to stock, same thing. Loaded different tune, same thing.

Gotta get to work, any suggestions?

 

[VENOMOUS1 RACING]

Loaded tune last night.

Truck horn went off this morning like alarm was going off. I get in the truck and when I turn the key on, the gauges do a sweep like I'm calibrating the instrument cluster.

I try to start and nothing.

Instrument cluster says HR3457

I returned to stock, same thing. Loaded different tune, same thing.

Gotta get to work, any suggestions?

Do a gauge sweep test by holding trip reset button down on gauge cluster, them turning key to on. It will test all gauges and report codes like you had if there's an issue. See what it reads.
Check other electrical like windows, locks, radio, lights. Is all good? Check fuses if not. There's one fuse by 2 airbag fuses that has shorted while installing SCT before on a few trucks.

 

[Nucdancer01]

Must've been a custom time for previous owners truck that didn't jive..

I disconnected the battery, reconnected, went stock, then canned tune. No problems since...

 

[viperhauler]

you need a new battery...

 

[Nucdancer01]

you need a new battery...

Why ?