The small wire should have voltage when in the S position of the key. The starter relay should engage and spin the engine when that little terminal gets voltage. If you take the wire off of the terminal and use a jumper to that small terminal from the battery non grounded terminal, it will either work (crank) or not work (not crank). If it still does not crank, the fault is either a faulty ground to the starter/solenoid combo, or a bad solenoid. If it does crank the problem is in the wire coming from the ignition switch, or the supply to the switch. A volt meter will measure voltage on and open ended wire easily. This can fool a person into believing it is working. A poor connection, or bad wire can pass enough current to read good voltage, but not supply any where near enough to pull in the solenoid. If you leave it attached to the solenoid when checking its voltage when trying to crank, you will find your answer related to the switch and wires. !2v it is the solenoid, less than 6v it is the switch/wires. Jim
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Today's Featured Article - Upgrading an Oliver Super 55 Electrical System - by Dennis Hawkins. My old Oliver Super 55 has been just sitting and rusting for several years now. I really hate to see a good tractor being treated that way, but not being able to start it without a 30 minute point filing ritual every time contributed to its demise. If it would just start when I turn the key, then I would use it more often. In addition to a bad case of old age, most of the tractor's original electrical system was simply too unreliable to keep. The main focus of this page is to show how I upgr
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