I need help diagnosing a problem with my 98 s10. Can't quite figure it out. I lose power randomly. Sometimes it just happens for no reason but also happens when I do something like switch on my brights or turn the heat on. Almost always cuts out when I turn it off. Usually jiggling the battery gets it back up. The cables are attached pretty snug, recently replaced my alternator, and the battery reads over 14 volts. If I'm running at a high enough speed it'll kick back on shortly.