2003 Saturn L200 Electric

Alarm activates randomly, gauges off and on, dome lights flickering while running, keyless entry does not work, headlights flicker (only when on the automatic setting) when the headlights are manually turned on they work steadily. The car starts, then will turn off seconds later. I can hear what sounds like an electrical arc around the waterpump when it activates.

-I've tested both the alternator and battery. The Battery had a low cold volt reading but passed. I did find little corrosion on the pos. Battery terminal. (Cleaned and re-attatched), I cannot find any bare wires, loose grounds, or burn marks anywhere. I've checked all fuses under the hood and inside the car. I cannot find the alarm fuse. I understand its inside the dash so I haven't dove into that yet. The BCM would be a good assessment of the problems I am having but its an expensive part and would like to troubleshoot any other possibilities first. I'm leaning towards an alarm issue due to it being the start of the issues and knowing the alarm relays electrical signals to all the issues im having.

- Any other ideas would be greatly appreciated