Lull 944E-42 Service Manual - Manual (Page 746)

Electrical System
9.236 Model 644E-42/944E-42 Rev. 6/04
b. Engine Oil Pressure Switch Disassembly
DO NOT disassemble the switch. Replace a defective or
faulty switch.
c. Engine Oil Pressure Switch Inspection and
Replacement
Inspect the switch and the wiring harness connector
terminals for continuity. Replace a defective or faulty
switch with a new part.
d. Engine Oil Pressure Switch Installation and
Testing
1. Thread the switch (3) into the engine block. Connect
the wire harness connector (2) to the engine low oil
pressure switch connector (1).
2. If the vehicle has dual batteries, connect both
negative battery cables (4 and 5) to both batteries.
Connect the lower negative battery cable (4) to the
negative (-) terminal on the lower battery (6). Swing
the upper battery box (7) in and make sure that the
lip (8) on the upper battery box slides below the
knob (9). Secure in place with the knob.
3. Lower and lock engine cover (10). To release and
lower the engine cover from the fully raised position,
lift up slightly on the cover and push the upper part
of the right gas shock (11) (orange tab) to the left.
Line up the upper part of the shock lock tube with the
lower part of the gas shock and pull the cover down
to the closed position.
4. Clear the area around the vehicle of personnel and
any obstructions to vehicle travel.
5. Start the engine, allow it to reach operating
temperature, and observe the front dash panel for
switch indication. If the switch is not defective, the
problem could be elsewhere; possibly in a shorted
wire, improper-running engine, defective display, etc.
MU4500
1
2
3
MU0650
4
5
6
9
8
7
4110390
1.
2.
OU0780
11
11
10