Every light but the check engine

I hadn’t driven the truck between Monday and Saturday.

Saturday hopped in checked oil went to the car was and loaded up for a trip to upstate NY.

Got on the highway and EVERY light but the CEL was on.

Went home, ran a quick scan - no engine issues.

Tach, speedo, 4hi-4lo, temp, all jumping around and flashing on/off.

Has anyone had this issue?

 

Also no CEL.

 

Also - I changed the battery and everything went to normal - but still getting a code that shows a voltage drop when under load.

Ran the AC on high - brights - seat warmers and radio for a load test.

This made me change the battery.

I hopped in the Honda and shot to NY, but when I get home tonite indropping the truck at the dealer.

 

Took the truck to the dealer. Ran a diagnostic checked the charging system they say all is well.

I will Need a drive belt soon.

Service advisor said the alternator is under warranty but they can’t do anything because it’s chargubg well.

Service advisor said the battery may be too small for the truck so I’ll take the one I bought last week back.

Before I could get home the lights started acting stupid all over again.