Lull 944E-42 Service Manual - Manual (Page 667)

9.157 Model 644E-42/944E-42 Rev. 6/04
Electrical System
9.10.9 Park Brake Warning Indicator Troubleshooting
0000000
RPM X 100
5
10
15
30
20
25
F
1/2
E 104
176
80
248
120 °C
°F
D
r/min
Park brake warning
indicator stays ON
with park brake
disengaged.
If OK
Replace diode board.
If OK
Park Brake
Warning Indicator
MU4310
Disconnect VP1 diode board.
Indicator light should go out.
Check park brake switch for
battery voltage at
wire [PB3] (BLK/WHT) with
switch in OFF position.
Replace park brake switch.
Not
OK
Before troubleshooting any
electrical circuit, ALWAYS begin
by checking the following:
1. Fuses.
2. Battery for proper charge.
3. All connections relating to
circuit are clean and tight.
4. All grounding straps are intact
and securely fastened, refer to
Section 9.1.12, “General
Overview (Vehicle Ground
Strap Locations).”
5. Check dash panel bulbs for
proper function.