Service manual

Section 10
10-90
Model 3606 • Origin 10/99
40. ENGINECOOLANT TEM-
PERATURE SWITCH
Engine coolant tempera-
ture warning indicator on
operators display panel
fails to illuminate when
engine is overheated.
1. Defective engine coolant
temperature sender.
2. Defective wiring.
1. Check and test sender. Test
electrical circuit to sender.
2. Test circuit for continuity and
repair as required.
41. Engine coolant temperature
warning indicator illumi-
nates when engine is not
overheated (indicator lights
during lamp test on engine
start up for five seconds; if
sender wiring is discon-
nected, operators display
indicator will light).
1. Short circuit in wiring.
2. Defective engine coolant
temperature sender.
1. Disconnect the wiring harness
connector at the engine coolant
temperature sender switch on the
engine block. If the indicator goes
out, install a new engine coolant
temperature sender switch on the
engine block.
2. If the indicator continues to
illuminate, check the wire lead at
the display panel and at the
ignition switch for a short to
ground. Repair a short circuit or
replace the sender.
42. BATTERY/ALTERNATOR
CHARGING
WARNING INDICATOR
Charging indicator fails to
illuminate when alternator
is not producing voltage
(but does illuminate during
engine start-up lamp test).
1. Defective alternator or wiring. 1. Test and/or replace alternator
and wiring
43. TRANSMISSION
Temperature Warning
Indicator
Transmission temperature
warning indicator fails to
illuminate when transmis-
sion is overheated.
1. Circuit wiring is disconnected or
defective.
2. Transmission temperature sender
switch on transmission is
defective.
1. Check wiring, test circuit and
repair as required.
2. Replace switch.
Electrical System Troubleshooting
Problem Possible Cause Remedy