Brake Switch (Electric Pto) - Craftsman 28906 Professional Shop Manual

ELECTRICAL SYSTEM
To access the brake switch:
,
Remove the deck by following the steps
described in Chapter 8: Cutting Decks and Lift
Shaft.
,
Squeeze the tab on the underside of the brake
switch with a pair of pliers, while pushing up on
the brake switch. See Figure 7.13.
Figure 7.13
Brake switch (electric PTO)
The brake switch is mounted on the top side of the
frame, on the left side behind the dash.
See Figure 7.15.
,
,
Reach in between the left side of the engine and
the dash. Pull the switch and harness pigtail out
as one piece. See Figure 7.14.
Figure 7.14
Install the brake switch by following the previous
steps in reverse order.
The plunger on the switch is depressed when
the clutch / brake pedal is pressed-down, de-
clutching the drive belt and applying the brakes.
The switch contains two sets of contacts.
The brake switch is accessed by removing the
fender and dash. The fender and dash can be
removed by following the steps described in
Chapter 4: Body/Chassis.
A normally open (NO) set of contacts is in the
starter inhibit circuit. When the clutch / brake
pedal is depressed, the contacts are closed,
power coming from the key switch (key switch in
START) through the oranqe wire is passed on to
the PTO switch through the oranqe wire with
black trace.
A normally closed (NC) set of contacts is in the
safety shut-down circuit. A circuit is completed
from the ignition module's primary windings to
ground. The ground comes from the seat switch
(if the seat is empty) through the yellow wire with
black trace. If the brake pedal is up, that ground
signal will pass through the brake switch to the
ignition through the yellow wire.
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