Well, I finally had a chance to get under the dash of the van to see where the brake control relay and EBCM were located based on the parts diagram.
Had hoped it was easily accessible through the kick panel area, but in truth, the EBCM and the relay are stuffed up in the dash next to the firewall and the parking brake lever
Wanted to eyeball the relay before buying a replacement.
As it stands right now, the underside of the dash, the finish trim and the plastic trim on the bottom of the dash where the OBDII connector is, have to come out/off to get closer the the relay. The EBCM is actually easier to get to than the relay.
Sure enough as Tech II mentioned, there is a heavy gauge red wire going to the relay that likely disappears through the firewall to the ABS module.
Still convinced I have some sort of electrical issue as the floor on the driver's side under the sound deadener and floor carpeting was wet with an 1/8" of water. Exactly where the water is coming in remains a mystery at this stage.