Hi r3v,
I'm currently diving into my first ever engine swap in a 1991 318is. Since the M42 got destroyed by the previous owner, I am planning on doing an M52 swap. The reason I'm in the M42 sub-forum is because I am confused about the M42's wiring. The engine is out of the car, but the engine harness is still in there. I'm not entirely sure what the wires are that run into the fuse box do (Not the C101, but the wires right to the right of the C101). I am also confused about what the little module that looks like it has a few ground wire connections going to it that is directly to the left of the heater core and sort of above the other battery tray in the engine bay. The rest of the harness was fairly easy to undo, but I'm just confused about the portions of the harness I listed. This is my first time doing any sort of engine swap electrical so bear with my lack of knowledge. Thanks!
I'm currently diving into my first ever engine swap in a 1991 318is. Since the M42 got destroyed by the previous owner, I am planning on doing an M52 swap. The reason I'm in the M42 sub-forum is because I am confused about the M42's wiring. The engine is out of the car, but the engine harness is still in there. I'm not entirely sure what the wires are that run into the fuse box do (Not the C101, but the wires right to the right of the C101). I am also confused about what the little module that looks like it has a few ground wire connections going to it that is directly to the left of the heater core and sort of above the other battery tray in the engine bay. The rest of the harness was fairly easy to undo, but I'm just confused about the portions of the harness I listed. This is my first time doing any sort of engine swap electrical so bear with my lack of knowledge. Thanks!
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