Lull 944E-42 Service Manual - Manual (Page 637)

9.127 Model 644E-42/944E-42 Rev. 6/04
Electrical System
With the ignition ON and
the turn signal control
selector rotated to 1st
position (Position Parking
Lights Only), parking lights
remain OFF.
Not
OK
Check for battery voltage at
pin 8, wire [RL1] (RED/WHT)
on turn signal control
selector connector.
Not
OK
Not
OK
If OK
Check for battery voltage at
pin 6 on turn signal control
selector connector.
If OK
Replace turn signal
control selector.
Not
OK
Check for battery voltage at
pin A, wire [PS1A] (WHT) on
roadlight female connector.
Replace cab
roadlight harness.
If OK
Replace vehicle
roadlight harness.
Check for battery voltage
across pins 2 & 6, wire
[RLG3] (BLK) & [PS1D]
(WHT) (Left), [RLG4] (BLK) &
[PS1E] (WHT) (Right) on
roadlight connector or pins
1 & 3, wire [RLG1] (BLK) &
[PS1C] (WHT) (Left),
[RLG2] (BLK) & [PS1F]
(WHT) (Right) on
taillight connector.
Replace cab
roadlight harness.
If OK
Replace failed bulb.
Replace vehicle
roadlight harness.
Before troubleshooting any
electrical circuit, ALWAYS begin
by checking the following:
1. Fuses.
2. All connections relating to
circuit are clean and tight.
3. All grounding straps are intact
and securely fastened, refer to
Section 9.1.12, “General
Overview (Vehicle Ground
Strap Locations).”
4. Verify that the high or low
beam circuits are operating. If
not, follow the steps listed at,
Section 9.8.41, “Light Power
Relay Circuit &
Troubleshooting (Option),”
before troubleshooting the
parking lights circuit.
5. If one of the parking lights
work, the circuit is fine, the
failed bulb needs to be
replaced.