Try and look at all your connections you may have some corrosion somplace that may be causing this problem. follow all the wires from the battery. somtimes it can be just this simple. also use some electrolitic grease on those fittings. Make sure you check your ground wire. thats the black one off the battery. Email me at [email protected] and i can send you a pdf file for a parts brake down to give you a idea where everything goes.