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From: Jon on 20 Jun 2010 11:59
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.



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