Relay Test (F6)

This test allows the user to turn the relay on and off using the up arrow and down arrow keys on the TECH-1. The battery voltage supplied to the Electronic Brake Control Module (EBCM) through the relay contacts is displayed on the screen during the test. When the relay is commanded on, the voltage should be equal to the battery voltage. When the relay is off, the voltage should drop below 2 volts.

NOTE: Voltage will not drop to zero when the relay contacts are open due to capacitors in the EBCM. If voltage drops below 2 volts, the relay is operating properly.