Parking Brake Switch
The parking brake switch is a normally open proximity
switch. The parking brake switch is attached to the bot-
tom of the brake pedal. The switch on machines with a
serial number below 310000000 is different than the
switch on machines with serial numbers above
4. If parking brake switch is faulty, replace switch. Ad-
just switch after installation (see Parking Brake Switch
in the Adjustments section of this chapter).
5.
If the parking brake switch tests correctly and a cir-
cuit problem still exists, check wire harness (see Wiring
Schematic and Circuit Drawings in Chapter 9 -- Electri-
cal Diagrams).
310000000
but the switch function is the same.
Whentheparkingbrakeisnotapplied,theparkingbrake
detent is positioned near the target end of the parking
brake switch so the switch is closed. The parking brake
detent is moved away from the switch when the parking
brake is applied causing the switch to open.
6.
connected to the parking brake switch after testing.
Make sure that wire harness electrical connector is
Testing
SERIAL NUMBER
BELOW 310000000
5
1.
Before testing the parking brake switch, the switch
and its circuit wiring should be tested as an ECM input
with the Diagnostic Display (see Diagnostic Display in
the Troubleshooting section of this chapter). If the Diag-
nostic Display verifies that the parking brake switch and
circuit wiring are functioning correctly, no further switch
testing is necessary. If the Diagnostic Display deter-
mines that the parking brake switch and circuit wiring
are not functioning correctly, proceed with testing pro-
cedure.
3
2
1
4
2.
(Fig. 35), test parking brake switch as follows:
On machines with serial numbers below 310000000
A. Make sure ignition switch is in the OFF position.
Disconnect the wire harness electrical connector
from the switch. Check thecontinuity ofthe switch by
connecting a multimeter (ohms setting) across the
switch connector terminals.
Figure 35
1.
2.
3.
Parking brake switch
4.
5.
Parking brake detent
Brake pedal
Switch plate
Carriage bolt
B. There should be continuity (closed) between the
switch terminals when the parking brake is released
(not applied). There should not be continuity (open)
between the switch terminals when the parking
brake pedal is depressed (applied).
SERIAL NUMBER
ABOVE 310000000
5
3.
(Fig. 36), test parking brake switch as follows:
On machines with serial numbers above 310000000
3
2
A. Turn ignition switch to the ON position (do not
start engine) and check LED on cable end of parking
brake switch. LED should be illuminated when the
parking brake is released (not applied). LED should
not be illuminated when the parking brake pedal is
depressed (applied).
4
2
3
1
NOTE: Wheninstallingtheparkingbrakeswitchonma-
chines with serial numbers below 310000000, place
switch plate tab into switch mounting hole that is closest
to target end of switch.
6
Figure 36
1.
2.
3.
Parking brake switch
Lock washer (2 used)
Jam nut (2 used)
4.
5.
6.
Parking brake detent
Brake pedal
Switch LED location
Electrical System
Page 5 -- 30 Rev. B
Reelmaster 5010 Series
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