Komatsu 830E Shop Manual page 151

Relay Board 3. . . . . . . . . . . . . . . . . . Stop Lights
1 - Light Module Display card
1 - Rev Light (Green): This light is "ON" whenever
the selector switch is in the "reverse" position,
and the key switch is in the "ON" position.
4 - 15 amp circuit breakers (CB16, CB17, CB18,
CB19)
4 - Relays
• Manual Back-up Lights Relay . . . . . . . . . . (K1)
• Stop Light Relay . . . . . . . . . . . . . . . . . . . . (K2)
• Retard Light Relay . . . . . . . . . . . . . . . . . . (K3)
• Slippery Road Relay . . . . . . . . . . . . . . . . . (K4)
(Not installed on all trucks)
Relay Board 4. . . . . . . . . . . . . . . . Parking Brake
1- Steering Pressure Bleed Down Timer Module
card.
1 - Bleed Down Light (Green): This light is "ON"
when the bleeddown solenoid is being ener-
gized. The bleeddown timer will energize the
solenoid for two to three minutes after key
switch is turned "OFF".
2 - 5 amp circuit breakers (CB20, CB22)
1 - 15 amp circuit breaker (CB21)
4 - Relays
• Park Brake Failure . . . . . . . . . . . . . . . . . . (K1)
• Cranking Oil Pressure Interlock Relay . . . (K2)
• Horn Relay . . . . . . . . . . . . . . . . . . . . . . . . (K3)
• Body Up Relay . . . . . . . . . . . . . . . . . . . . . (K4)
D03026
Relay Board 5 . . . . . . . . . . . . . . . . . .Head Lights
1 - Light Display Module card
1 - Lights Control Light (Green): This light is "ON"
5 - 15 amp circuit breakers (CB23, CB24, CB25,
4 - Relays
24VDC Electrical System Components
when there is 24 volts being supplied to the
battery terminal of the light switch.
CB26, CB27)
• Left Low Beam Relay . . . . . . . . . . . . . . . . (K1)
• Right Low Beam Relay . . . . . . . . . . . . . . . (K2)
• Left High Beam Relay . . . . . . . . . . . . . . . . (K3)
• Right High Beam Relay . . . . . . . . . . . . . . . (K4)
D3-11