T25-006 - VMI-Q / VMI-6 Diagnostic guide

Created by George Lopez, Modified on Wed, 19 Nov at 7:21 AM by Rudy Quijada

Welcome to the VMIQ - VMI6 Guided Diagnostic Chart! If you are experiencing issues with no power to the VMI control board or no LED indication, follow the steps below to troubleshoot the problem:


1. Check the LOG PWR (1 or 3 AMP) and the MTR PWR (30 AMP) fuses in the VMI AUX fusebox.

2. Check the fuseable link on the positive battery post. Is the link intact? If not, repair or replace the link and retest the system.

3. If the system still does not wake, ensure that both fuses are in good condition. If not, repair or replace the fuse(s) and retest the system.

4. At the VMI Q or 6, check for 12V at J1 pin G (VMIQ), CON B pin 4 (VMI6) blue wire, and J1 pin C (VMIQ), CON B pin 3 (VMI6) white or WT/RED. If there is no 12V at both wires, repair or replace the wire/connector and retest the system.

5. Check for ground at J1 pin B (VMIQ), CON B pin 1 (VMI6) black wire. If there is no ground at both wires, repair or replace the wire/connector and retest the system.


If after following these steps the system still does not wake, it may be necessary to replace the VMI Q or VMI 6. If you have any further questions or need assistance, please don't hesitate to contact our customer support team. We are here to help!

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