Have your battery checked out. It seems these vehicles need all 12 volts and then some, when that drops even a little, the VIC is the first to go.
At lot of times when mine is in the shop and up on the rack w/ doors open, ignition on etc. the damn thing resets.
1995 ZJ Limited. 4.0L
"nobody cares what's underneath," ...Dieter Zetsche