After vehicle sits for 3 or 4 days, no start. Battery shows 12-13 volts. I remove terminals and hold together for 15-20 minutes. Vehicle starts.
After driving about a day door locks become inoperable. Any answers?

 

Holding Battery Terminals together does the same thing as clicking your heals together................. nothing.

You are still using the Crappy Azzed OEM Battery Terminal Connectors aren't you? If so, you need to do the Number ONE FIRST H3 Mod, change the Battery Terminals of a quality aftermarket set like Stingers or your favorite brand. The OEM Terminal Connectors are junk and do NOT maintain a consistent connection once taken on/off the battery a few times. Known failure point on every H3/H3T

The door locks/window thing happens when you disconnect the battery and in about 8.5 times out of 10 it will go away by itself after 5-10 ignition cycles.

 

I had same sort of issue. but my key also got locked in the ignition. H3 wouldnt start at all. I read something about removing battery cables for 20mins and it started. I believe its some type of security issue. i found a video claiming if you turn the key to the on position and wait a few secs turn it on they haven’t received a issue. Do what doc says and change those terminals also.