019-040   Engine Protection Warning Lamp

General Information


The engine protection system uses a lamp or a buzzer to alert the driver of one of the following conditions:

  1. Low coolant level
  2. High coolant temperature
  3. Low oil pressure
  4. High oil temperature
  5. High intake manifold temperature
  6. Very low oil pressure.

The engine protection system warning lamp circuit is a positive (+)
12-VDC (24-VDC in U.K. and Europe) supply from the vehicle keyswitch, a lamp or buzzer, and wire number 1 (engine protection output driver).


Voltage Check


Measure the voltage between the fault lamp and ground. Turn the vehicle keyswitch ON. Touch the positive (+) multimeter probe to the buzzer or lamp terminal. Touch the negative (-) multimeter probe to the chassis ground. Measure the voltage. Repeat this check for the other terminal of the buzzer or fault lamp. The multimeter

must show battery voltage. If the proper voltage is

not present, there is a problem with the keyswitch wire, or the lamp (or buzzer) has failed. Refer to the OEM troubleshooting and repair manual for repair instructions.

Connect all components when the repair is complete.

Last Modified:  10-Feb-2003

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