Electrical
101
Seat Safety Switch
The Seat Safety Switch consists of a pair of simple
metal contact tangs attached to the seat mounting bracket.
See Figure 7.14.
•The yellow wire with black trace is connected to
one of the spade terminals of the seat safety
switch. When the seat is vacant, the tab on the
seat bracket applies a ground path to the tangs.
The yellow wire with white trace carries this ground
signal to the PTO switch. If the PTO is ON and the
seat is empty, the circuit is completed, shorting-out
the primary windings of the magneto, turning-off
the engine.
•The yellow wire with white trace is connected to
the other spade terminal on the seat safety switch.
When the seat is vacant, the tab on the seat
bracket provides a ground path to the tang. The
yellow wire with white trace carries this ground sig
-
nal to the brake switch. If the brake is not applied,
and the seat is empty, the circuit is completed,
shorting-out the primary windings of the magneto,
turning-off the engine.
NOTE: The orientation of which wire to which tab does not
matter. It will not affect the operation of the circuits.
NOTE: On current production, the connector for the yellow
wire with a black trace has two wires in it. One of
the wires will go to the PTO switch. The other wire
is from the reverse switch or the OCR if equipped)
and is tied into the wire gong to the PTO switch.
See Figure 7.15.
• The most common problems are likely to be
caused by physical damage: a broken insulator
between the switch and the seat bracket, an
unplugged wire, or a bent tang.
Figure 7.14
Seat safety switch
(seat empty)
Yellow wire white
trace
Yellow wire/
black trace
Insulator
Ground
tab
Contact tangs
Figure 7.15
2 yellow wires
with a black trace
FOR DISCOUNT PARTS CALL 606-678-9623 OR 606-561-4983
www.mymowerparts.com
To Next Page
Loading...
