by indicate do you mean use the blinkers, check and clean all youre ground connections and check alternator output with a meter should be over 13 volts with engine running and over 12 at the battery not running
it certanly could if youre not getting good connections its just a guess on my part but i had a cherokee that if you turned up the volume real loud it would cut off
i have no idea how the belts are routed and if its even possible for it to get loose but might as well check that too