If the engine cranks ok (or starts), then the batteries are
good enough for testing the glowplugs. If the engine starts,
shut it off.
You can use STE/lCE Test 10 to measure cranking speed.
The engine should crank at least 100 RPM in cold weather
and at least 180 RPM in warm weather.
The WAIT-TO-START lamp is NOT diagnosed in
this section. If the lamp does not work property,
the glowplug circuit may be affecting its operation.
Run these tests to check out the glowplug circuit.
If the lamp still does not work properly, go to the
INSTRUMENTS section for a full diagnosis of the
Disconnect negative battery cable before disconnecting
and reconnecting protective control box harness.
There is battery voltage at the PCS at all times. Failure to
disconnect battery cable will result in damage to equipment
or injury to personnel.
BAD CONNECTIONS ARE THE MOST COMMON
Sometimes, just disconnecting, cleaning and reconnecting
will solve a problem. BE THOROUGH ! The time you
save may be your own. Refer to the functional flow
schematic and check the following
1. BATTERY - make sure all connections are dean and
tight, including the shuntand power stud.
2. PROTECTIVE CONTROL BOX - unscrew BOTH
connectors and look for bent or broken pins, pins pushed
out of their socket, or dirt and corrosion in the
3. GLOWPLUG CONTROLLER - pop the controller
connector off (squeeze the sides) and check the pins in
both the controller and the connector. Look for bent,
broken or pushed out pins, dirt or corrosion. Check for
broken wires at the connector. Take note that pin 2 of the
glowplugs controller connector has no pin in it.
4. GLOWPLUGS - Check that all the glowplug wires are
snug. Dont just look with your eyes. Many problems are
solved by Iooking with your fingers to be sure a
connection is snug.
The glowplugs first come ON when the engine temperature
is below 120 °F (49°C) and the rotary switch is turned to
RUN. They stay ON for up to 9 seconds and then go OFF.
They will stay OFF for about 7-15 seconds then come ON
1. Set the voltmeter to a DC volts scale of about
2. Connect the BLACK lead to the battery side of
the current shunt and the RED lead to the other
end of the current shunt.
3. Currant shunt voltage is proportional to battery
current, 100 millivolts = 1000 amps. To get
current, multiply millivolts x 10.
STE/ICE-R TEST 80
1. Start Test 80, battery currant.
2. Displayed reading is in amps. The reading will
be greater then 30 amps, depending on how
many accessories you have on.
again for about 1 second.
To check for glowplug current draw, start STE/lCE-R Test 80, battery current. Turn off all accessories (lights, heater, wipers
etc). STE/lCE-R should immediately measure at least 74 amps. Take note, however, that if all your glowplugs are working,
the current draw should be close to or more than 100 amps, especially if its cold. If its near freezing and the glowplugs only
draw 75-80 amps, you probably have a few bad glowplugs.