Chrysler RAM TRUCK 2500 1994 Service Manual page 404

• INSTRUMENT PANEL AND GAUGES 8E - 7
arm. Replace or repair tank and recheck sending
unit. Refer to Group 14 - Fuel System.
(b) Sending unit improperly installed, restricting
float arm travel. Install properly.
(c) Float arm deformed. Make sure sending unit
float arm moves freely and pick up tube is not bent
so that i t contacts bottom of tank. Inspect float for
any signs of damage or leaks.
(d) Fuel tank mounting flange for sending unit
deformed. Feel for interference fit of sending unit
to bottom of tank. I t is permissible to bend pick up
tube down a little near mounting flange to gain in­
terference fit.
LOW FUEL WARNING DIAGNOSIS
For diagnosis refer to Warning Lamps - Low Fuel
Warning.
OIL PRESSURE GAUGE DIAGNOSIS
When a problem occurs with an individual cluster
gauge, before disassembling the cluster to check the
gauge, check for a defective sending unit (sensor) or
wiring. I f all gauges and warning lamps are inopera­
tive, check battery feed from ignition switch through
fuse #12 and wiring to cavity #8 of cluster connector
B (black).
FUEL GAUGE SYSTEM DIAGNOSIS
F U E L G A U G E S Y S T E M D I A G N O S I S
F U E L G A U G E
D O E S N O T
MAD F U L L
F U E L G A U G E
I N O P E R A T I V E
O R E R R A T I C
CHECK
T A N K N O T FULL
FAULTY W I R I N G OR
C O M P O N E N T S
r U E L G A U G E
I N A C C U R A T E
TANK DEFORMED
CHECK
F U E L G A U G E
DOES NOT
R E A D E M P T Y
TANK N O T EMPTY
CHECK
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CHECK ALL W I R I N G
I N C L U D I N G
G R O U N D
FAULTY PRINTED
CIRCUIT B O A R D
FAULTY FUEL G A U G E
S E N D I N G UNIT
FLOAT
FUEL G A U G E L O C K I N G
SENDING UNIT TABS
ELECTRIC
FUEL PUMP
M O U N T I N G
SCREWS
IN-TANK
FUEL FILTER
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PROPER A L I G N M E N T
O F PICKUP A N D
SENDER ASSEMBLY.
REFER T O G R O U P 14
PROPER A L I G N M E N T
O F PICKUP A N D
SENDER ASSEMBLY.
REFER T O G R O U P 14
FUEL GAUGE
INPUT
FAULTY FUEL
G A U G E
J908E-74
J9414-33
Fig. 2 Fuel Tank Sending Unit
Fig. 3 Fuel Gauge Terminals—High Line Cluster