44
Electrical System
Stop Light Switch Replacement
1. Disconnect the electrical connectors from the switch terminals.
2. Exhaust air pressure from the system.
3. Disconnect the air lines from the switch and then remove the switch from its mounting plate.
Operating Test
1. Apply the brake valve and note that, with the first downward movement of the treadle, the stop
light indicator light immediately lights.
2. Release the treadle and note that the stop lamp indicator light turns off.
Directional Signal System
The directional signal system consists of two lights located in the rear corner panels, two lights in the
front headlight bezels, and six lights mounted in the sides of the coach.
The system is controlled by two foot operated, momentary type switches mounted on the floor to the
left of the steering column. The high/low beam switch is also mounted in the same place, between the
two turn signal switches. Because the switches are the momentary type, the button must be held down
to function and will return to the off position when released. There is a turn signal indicator light at each
end of the indicator light panel that flashes whenever the left or right turn signal is operating. There is no
flasher unit in the turn signal system. The flasher function is provided by the processor in the multiplexer
system. Refer to the “Turn Signal Lights” wiring diagram in the
Electrical Schematics Manual
for fur-
ther information on the circuits and connectors involved.
Directional Signal Switch Replacement
The only periodic maintenance required is to ensure the directional signal switch terminals are clean and
tight. The switches are non-repairable and must be replaced if found defective.
For easier installation when replacing a switch, be sure to mark each wire before disconnection. If mark-
ing is overlooked, refer to the “Stop, Tail, and Turn Signal Lights” wiring diagrams in the
Electrical
Schematics Manual
for further information on the circuits and connectors involved.
To replace a switch:
1. Remove the screws that attach the switch to the angle bracket and pull the switch up and out of
the floor covering far enough to disconnect the wiring connectors at the back of the switch.
2. Attach the wiring connector to the correct terminals on the new switch.
3. Attach the switch to the floor bracket with the screws.
Hazard Warning System
The hazard warning system consists of the front, side, and rear turn signal lights, the hazard switch on
the ignition panel of the driver’s console, and the processor in the multiplexer system that provides the
flashing function. Refer to the “Hazard Light” wiring diagram in the
Electrical Schematics
Manual
.
Summary of Contents for LOW FLOOR
Page 18: ...Specifications 18...
Page 58: ...Preventive Maintenance 58...
Page 110: ...Engine 110...
Page 138: ...Transmission Driveline Rear Axle 138...
Page 182: ...Suspension 182...
Page 260: ...Air System 260...
Page 420: ...Electrical System 420 Deutsch DT Series Connectors...
Page 421: ...Electrical System 421...
Page 422: ...Electrical System 422 Deutsch HD 10 Series Connectors...
Page 423: ...Electrical System 423...
Page 424: ...Electrical System 424 Deutsch HD 30 Series Connectors...
Page 425: ...Electrical System 425...
Page 442: ...Heating Air Conditioning 442...
Page 492: ...Body and Interior 492 Figure 11 33 USSC Seat Assembly...
Page 493: ...Body and Interior 493 Figure 11 34 USSC Seat Suspension Assembly...
Page 495: ...Body and Interior 495 Figure 11 37 Seat Air Connections...
