Workman HDX AutoPage 6 − 14Electrical System
Brake Switch
The brake switch is a normally closed switch that is at-
tached to the frame under the dash (Fig. 15). When the
brakes are not applied, the brake pedal presses the
brake switch plunger to open the switch. When the
brakes are applied, the pedal moves away from the
brake switch plunger to allow the switch to be in the nor-
mally closed state. This will allow a current path to ener-
gize the start enable relay and also to illuminate the stop
lights.
Testing
1. Park vehicle on a level surface, shut engine off, re-
move key from ignition switch and apply parking brake.
Locate the brake switch (Fig. 15).
2. To ease access to brake switch, remove hood of vehi-
cle (see Hood in the Service and Repairs section of
Chapter 5 − Chassis).
3. Disconnect the wire harness connector from the
brake switch.
4. With the use of a multimeter (ohms setting), test for
continuity across the two (2) switch terminals. There
should be continuity (zero ohms) when the brake pedal
is depressed (switch plunger extended). There should
not be continuity (infinite ohms) when the brake pedal
is released (switch plunger depressed).
5. Replace brake switch if testing proves it to be faulty.
6. After switch testing is completed, connect the wire
harness connector to the brake switch.
7. Install hood if it was removed (see Hood in the Ser-
vice and Repairs section of Chapter 5 − Chassis).
Figure 15
2
1
1. Brake pedal 2. Brake switch
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