I need you to check for continuity to ground between the black wires at the connector and a known good ground on the vehicle. You will need a multi meter. Basically, set it to ohms and check to see if continuity exists. What you are doing is basically making sure the wire has no breaks in it and that power flows through it and is grounded to the vehicle body.
Check the black wire that goes to the A pillar first. If that ground isn't good, then the other one won't be either. The one that goes to the A pillar and is bolted to the body is the actual grounding point.
Let me know.
Joe
Friday, April 30th, 2021 AT 2:20 PM
(Merged)