Posted by Janicholson on February 18, 2012 at 17:57:58 from (96.24.99.126):
In Reply to: Advice on wireing H posted by dcpky on February 18, 2012 at 17:18:25:
I will make a clear new definition: The reversal of the battery ground requires reversal of the amp gauge. (amp gauges are not all marked the same way and Pos Neg may mean different things). All electricity except starting heavy current needs to go through the amp gauge. This means there is only one #10 wire going to the Positive battery connection at the starter heavy switch, and it is connected on the terminal that connects to the battery cable, not the starter cable. This wire connects to the amp gauge terminal by itself. There is absolutely no connection between the mag and any electricity at all. From the mag side terminal a #12 wire goes to the mag kill switch. if it is a stock mushroom shaped knob switch, from a mag equipped tractor, it will have only one terminal!! the switch body is the ground that kills the mag when the button is in, and is open (allowing the mag to operate and fire the plugs). If there is a mushroom switch, and it has 2 terminals on the back, it is for a distributor/coil tractor. It can be used, but must be disconnected from the electrical wiring. If used it will need to have one terminal connected to the mag, and the other connected to ground. The switch will work in reverse, run will be pushed in, stop will be pulled out.
The lights are connected to the Amp gauge load terminal (the remaining one).
The alternator Bat wire (10ga) connects directly to the load side of the Amp gauge. There are two small spade terminals on the alternator and they are at right angles to each other. One is albeled L the other S. The L must be connected to a voltage source to energize (excite) the alternator. This can be a momentary contact push button, or an oil pressure switch that closes on pressure (NAPA). Which ever of these is used should be connected to the load side of the Amp gauge. The momentary contact switch is pushed after the tractor is started, then released. The oil pressure switch is automatic because when there is oil pressure there is charg, when none it stos charging. If no switch is in this circuit, the alternator will be on all the time and it will run down the battery. The S terminal is connected to the Bat terminal with a short wire to sense the battery charging voltage. If the spade connectors are close together in the socket, use shring tubing to insulate them when plugged in. The L on the Hitachi equals the #1 terminal on a Delco. The S on the Hitachi equals the #2 terminal on a Delco. I hope this helps, Jim
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