Service Manual

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Workman GTX Electric Lithium

Page 3B -- 38

Electrical System

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 t he 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 t he parking

brakeswitchcircuit.

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

theleveronthebrakeswitch.Inthisswitchposition,

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 swit ch 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.

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).

1. Parking brake lever

2. Parking brake switch

3. Wire harness connector

Figure 37

FRONT

1. Common terminal

2. NO terminal

3. NC terminal

4. Switch lever

Figure 38