Todd, All there is on that starter circuit is the battery n cables n starter switch n starter. Nowwwww w it sounds like the cables n batery are alllll lllll l okay correct??? (If NOT check all of them n load test the battery and insure its good and its charged) Sooooo if the battery n all cables n grounds are good but no cranking that only leaves the switch n starter. Id isolate the switch or starter first by by pass jumping around the starter switch i.e use jumper cables from the hot ungrounded battery post direct down to the starter post or starter side of the switch n see what happens????? If she cranks then but NOT via the switch, its either a bad switch or a bad cable or connection on the switch. If she still dont crank even when you hot wire by pass with big jumpers direct to the starter, then it must be the starter. That alllll being said, the same problem can happen if theres even one single bad ground or cable or connection you know, sooooo Id remove, clean n wire brush, n reattach each n every battery n starter n ground n switch connection FIRST ALSO if the ground cable is on any thin or rusty sheet metal component, try reatatching it to a solid clean heavy frame bolt location, that may be the problem. FINALLY my guess is its the starter switch or else a bad cable or connection. In general if when you depress the starter switch the lights dim way down badly and/or the battery voltage drops drastically, THE SWITCH IS OKAY BUT THE STARTERS BAD However, if when you depress the starter switch the lights dont dim much and the batery voltage dont drop much, Id say the switch is bad. Hope this helps??? lemme know Ol John T and all in Indiana
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