Bendix Commercial Vehicle Systems VORAD VS-400 INSTALLATION NOTES - Manual (Page 13)

Product Safety Information
11
Step Procedure
C 1. Vehicle Ignition: Key-ON, Engine-OFF.
2 . Measure for ignition voltage on pins 4 and 5 on the harness connector .
a . If the voltage is within 0 .6 volts of the battery voltage measured in Step A .
i .
Proceed to Step D .
b . If the voltage is less than 0 .6 volts of the battery voltage measured in Step A or open .
i. Test Failed. Check component fuse. Troubleshoot power supply to the DIU for open/corroded
connections or shorts to ground and repeat Step .