Wiring confusion…
Hi everyone,
I’ve run into a problem with my car and I’m hoping someone here can help me figure it out as soon as possible.
I recently bought a 2010 E63 with the M156 engine. I’m currently working around the oil cooler/radiator area and I’ve noticed some wiring that doesn’t make sense to me. I’m uploading a video so you can see what I mean.
From the main wiring harness, there are four wires coming out that go toward the oil cooling radiator. However, at some point, two of them are isolated (not sure why), while the other two continue on to the oil cooling radiator.
What’s confusing me is that the car is not showing any fault codes at all, and all values are within normal tolerances (with minimal deviations). That makes me think this wiring might have been added or modified by the previous owner (I don’t have contact with them anymore).
I also checked the wiring diagram for the car, and it seems like this cable shouldn’t even exist in the factory setup.
I’d really appreciate help from someone knowledgeable in this area. Thanks in advance to everyone who takes the time to respond.