Have the battery checked. Most likely it's an internal short in the battery but it's possible it's a converter that's putting way too much juice in. My money would be on a shorted battery and if it overheats it's possible for it to explode. Watch for any signs of ballooning side case on the battery and disconnect it if this happens. Do NOTHING around it without safety glasses.
2011 F-150 HD Ecoboost 3.5 V6. 2550 payload, 17,100 GCVWR -
2004 F-150 HD (Traded after 80,000 towing miles)
2007 Rockwood 8314SS 34' travel trailer
US Govt survey shows three out of four people make up 75% of the total population
