Parking Brake Switch - Toro Workman GTX Electric & Lithium Service Manual

Parking Brake Switch

The parking brake switch is used as an input for the vehi-
cle controller to identify when the parking brake is ap-
plied. The parking brake switch is attached to the
parking brake mount behind the dash (Fig. 37).
A normally closed contact in the switch is opened when
the parking brake is released. When the parking brake
is applied, the switch is in its normally closed state. Only
two (2) of the switch terminals are used in the parking
brake switch circuit.
Testing
1. Park vehicle on a level surface, turn key switch to
OFF, engage the parking brake and remove key from
the key switch.
2. To access the parking brake switch, remove dash
(see Dash in the Service and Repairs section of Chapter
5 -- Chassis).
3. Disconnect wire harness electrical connector from
the brake switch (Fig. 37).
4. Connect a multimeter (ohms setting) across the
common and normally closed (NC) terminals of the
brake switch (Fig. 38).
5. With the parking brake released (not applied), the
washer on the parking brake lever should be depressing
the lever on the brake switch. In this switch position,
there should not be continuity (infinite ohms) between
the common and normally closed (NC) switch terminals.
6. With the parking brake applied, the washer on the
parking brake lever should not be depressing the lever
on the brake switch. In this switch position, there should
be continuity (zero ohms) between the common and
NC switch terminals.
IMPORTANT: The normally open (NO) switch ter-
minal is not used in the parking brake circuit.
7. If testing determines that the brake switch is faulty,
replace switch.
Electrical System
8. If the brake switch tests correctly and a circuit prob-
lem still exists, check wire harness for problems (see
electrical schematic and wire harness drawing in Chap-
ter 6 -- Electrical Drawings).
9. After brake switch testing is completed, connect wire
harness electrical connector to the switch.
10.Carefully position and secure dash to vehicle (see
Dash in the Service and Repairs section of Chapter 5 --
Chassis).
2
FRONT
1. Parking brake lever
2. Parking brake switch
2
3
1. Common terminal
2. NO terminal
Page 3B - - 38
Figure 37
3. Wire harness connector
1
Figure 38
3. NC terminal
4. Switch lever
Workman GTX Electric Lithium
1
3
4