RENR5042-02 161 Troubleshooting Section g01102467 Illustration 78 Schematic for the maintenance due lamp The ECM provides a path to ground for the lamp. When the ECM connects the lamp to ground the lamp will turn on. g01102466 Illustration 79 P1 connector (P1-13) Maintenance due lamp The connection of any electrical equipment and the disconnection of any electrical equipment may cause an explosion hazard which may result in in- jury or death. Do not connect any electrical equip- ment or disconnect any electrical equipment in an explosive atmosphere. Test Step 1. Check for Normal Operation of the Maintenance Due Lamp A. Monitor the maintenance due lamp. a.
Turn the keyswitch to the ON position. The lamp should turn on for five seconds. Then, the lamp should turn off. Note: The lamp will only turn off if a condition that requires maintenance does not exist.