OK I have a 91 chevy 1500 with a 4.3 in it. And lately I have been have problems when i put my truck into reverse.Now when I put the truck in reverse and let the trans back me up I'm fine, but if I'm in reverse and I step on the gas I lose all power to my truck and I end up having to replace my positive battery cable running to my starter. Any ideas of what could be causing this problem??

 

is it melting or burning in half? why replace it? or do u mean reposition it?

 

No it isn't melting the cable. when i take it off the cable looks fine but its been shorted out some how and it just has no power there is something shorting it out some how and i don't know what.