Archived 03 not charging

[Grunt03]

Got the "check gauges" light. Volt meter down to 8.
Replaced batteries and alternator.
Took out battery temp sensor under driver side battery.
Checked, cleaned all grounds, etc.
Volt gauge now only shows around 10.
ECM? What else can I check or what have I overlooked?

 

[Kirwin]

Large 120 amp fuse in Fuse box?

 

[Grunt03]

It's charging now. Not sure what I did but re-checked all connections. One wasn't as tight as I thought it should be. Must if been the culprit.
Thanks irwin