MTD Products, Inc. Model # 13am675g062 14.5hp Briggs & Stratton.
This shows how to rewire a failed ignition system for this lawn tractor. A 5-terminal 430-538 ignition switch is used to replace the 6-terminal original ignition switch.
** view in Courier font **
Ignition switch, 6 terminal
facing the connector
__ __ red green | red/black __ __ yellow red/white __ orange
facing the bottom of switch __ __ green red red/black | __ __ red/white yellow __ orange
(\) OFF red/black = yellow red/black = green yellow = green all others open
(|) RUN red/black = red red/black = red/white red = red/white all others open
(/) START red = red/white red = orange red/white = orange all others open
Ignition switch, 5 terminal:
facing the connector
__ __ red green __ __ yellow red/white __ orange
facing the bottom of switch __ __ green red
__ __ red/white yellow __ orange
(\) OFF red = orange all others open
(|) RUN green = yellow all others open
(/) START yellow = red/white all others open
Facing the bottom of switch,
__ __ T1 T2
__ __ T3 T4 __ T5
Remove the connector and rewire as shown. A 12 vdc SPST 5 amp relay A is needed..
12vdc = T4 o | / | / *-------o (/) o----*----- T3 ------o solenoid coil | START | | | | (A) coil A | | | | | ----- | --- | / - | / *------o (|) o-----*------ T1------o engine on/off switch | RUN | (red wire from engine) | | | ----- | ----- A contacts N.O. | | | | *------------------*
Run a wire directly from the positive terminal of the battery to T4 Run a wire directly from the solenoid coil to T3. The solenoid is located beneath the gear shift cover below the seat. Relay A coil can be grounded to the green wire on the connector. None of the other wires on the connector are used. Use spade connectors to wire directly to the ignition switch.
This bypasses all safety switches on the tractor.