Lull 944E-42 Service Manual - Manual (Page 669)

9.159 Model 644E-42/944E-42 Rev. 6/04
Electrical System
9.10.11 Fuel Level Gauge Troubleshooting
Replace cab harness.
Not
OK
Not
OK
Replace fuel level sender.
Not
OK
0000000
RPM X 100
5
10
15
30
20
25
F
1/2
E 104
176
80
248
120 °C
°F
r/min
D
Verify fuel quantity
level in tank.
Fuel level gauge reads
EMPTY while operating.
Fill fuel tank.
With fuel level sender
disconnected, fuel gauge
should read empty.
Disconnect fuel level sender
and check resistance across
fuel sender connector.
If OK
If OK
Replace dash panel.
Fuel Level
Gauge
MU4330
Not
OK
Full = 31 ohms
One-Half = 101 ohms
Empty = 255 ohms
Refer to page 9.48 or 9.50.
With jumper wire across
harness connector, wires
[D3] (GRY) and
[SG1] (BLK) fuel level
gauge should read full.
If OK
Replace fuel level sender.
If OK
If OK
Check front dash panel
pin 5, wire [D3] (GRY) for
open to ground.
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.