Reelmaster 5010 Series Page 5 -- 43 Electrical System
Oil Pressure Switch
The engine oil pressure switch is located on the engine
near the oil filter (Fig.57). The oil pressure switch is a
normally closed switch that opens with pressure.
The oil pressure switch should open at approximately 8
PSI (0.56 kg/cm
2
).
The Electronic Control Module ( ECM) monitors the op-
eration of the oil pressure switch. The switch and its cir-
cuit wiring should be tested as an ECM input with the
Diagnostic Display (see Special Tools and Trouble-
shooting in this chapter).
If low engine oil pressure allowed the oil pressure switch
to close during engine operation, the Diagnostic light
can be used to identify the fault (see Diagnostic Light in
the Troubleshooting section of this chapter).
Testing
NOTE: Refer to engine service manual for information
regarding engine lubrication system and testing.
1. Turn the ignition switch to the RUN position. The oil
pressure indicator light on the control panel should be
illuminated.
2. If the indicator light is not illuminated, open hood to
gain access to engine.
3. Locate oil pressure switch on engine and disconnect
the harness wire from the switch.
4. With the ignition switch in the RUN position, ground
the disconnected wire to the engine block.
5. If the light comes on, the oil pressure switch is faulty.
6. If the light does not come on after step 4, check the
oil pressure light circuit wiring and indicator light (see In-
dicator Lights in this section).
7. After testing is completed, connect the harness w ire
to the switch. Lower and secure hood.
1. Oil filter 2. Oil pressure switch
Figure 57
2
1
Electrical
System
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