Installation Instructions

9 ELECTRICAL SYSTEM
_--.- From Oil
Pressure
Lamp
B177F936
B177F937
From Main Switch 19 Terminal
r and Pre-heat Indicator Lamp
Glow Plugs
<>~
B177F915 -
B1700·B2100·B2400 WSM,11770
Engine Oil Pressure Switch
1) Panel Board and Wiring Harness
1. Disconnect the lead from the engine oil pressure switch after
turning the main switch off.
2. Turn the main switch on and connect a jumper lead from the
lead terminal
to the chassis.
3. If the engine oil pressure indicator lamp does not light, the
panel board circuit or the
wiring harness is faulty.
(1) Engine Oil Pressure Switch
2) Switch Continuity
1. Measure the resistance with an ohmmeter across the switch
terminal and the
chassis.
2. If 0 ohm is not indicated in the normal state, the switch is
faulty.
3. If infinity is not indicated at pressure over 4.9 kPa (0.5
kg/cm
2
,
7 psi), the switch is faulty.
Resistance
In normal state
Oohm
(Switch terminal-
At pressure over approx.
Chassis)
4.9 kPa (0.5 kgf/cm
2
,
7 psi)
Infinity
Glow Plug
1. Disconnect the lead from the glow plug.
2. Connect the tester positive cable to the glow plug lead and
negative one
to the chassis.
3. Measure its voltage with a voltmeter, after turning the main
switch
to the preheating or starting position.
4. If its voltage is not approximately the battery one, check the
main switch or
wiring harness.
9-524