jlach993
Full Access Member
That’s frustrating. I too hate throwing in the towel and going to a dealer, especially after putting in so much effort.
Hoping someone else can check my theory below to see if it makes sense:
Looking back at the circuit diagram, if the upper switch has power and is tripping the tailgate ajar circuit, looks like there is only two possibilities for the actuator not firing, both along line “M” in the circuit diagram: (1) There appears to be a splice junction (SJ255S - at least I’m guessing that’s what it is) on the ground side of the actuator - the actuator motor, door ajar circuit, and lower door switch all seem to join at that splice joint and then share a common ground after that point. Since the door ajar circuit and lower tailgate switch are working, the ground after the splice must be in tact. So maybe just that one leg from the actuator to the splice joint has come loose. The ground connection appears to be someplace in that tailgate area, so the splice must be back there too. (2) The wiring from the BCM to the actuator motor. Nothing else appears to be on that leg, and there is only a single connector between the actuator and the BCM. This connector is C3007/C3008 below the drivers seat. It’s shown “Detail E” of the connector quick reference that I posted earlier.
Can you check for a 12V pulse at the actuator harness when you press the upper tailgate switch using a known good ground? If you are getting voltage, then the problem must be ground side. If no voltage, then the problem should be on the wiring from the BCM. Or maybe test for continuity between the ground pin on the harness and a known good ground (or the actual ground connection for the harness C2700S-1 if you can access).
If no voltage to the harness, then the same type of test at that underseat connection.
Just brainstorming on the fly here. Hope it helps, and maybe others have better ideas.
hey man you've been a great help. Thanks for taking the time out and guiding me. Ill check those things out and report back tomorrow. I took a day off fiddling with the rover....just looking at it upsets me lol