in need of big help here, im getting my check gauges light on and my voltage drops out , i checked under the hood and it looked likethe positive terminal on the battery on the passenger side had arced due to a loose connection. after checking my driver side battery it was completly shot and than noticed smoking coming from the heater grid. there was power constantly going to the grid causing it to heat up extremly and even the intake tube. i took the power wire off the battery and obv doesnt heat up , is there a relay shorted out or is it the crappy battery causing everything. went for a drive after leaving the relays disconnected and the check gauges light still came on so i turned around and went home . i really need to get my truck goin any help would be awesome thanks.