The next day, Jack decided to investigate further. He used a multimeter to measure the voltage at the IKE module and discovered that there was a strange voltage reading on one of the pins. He suspected that there might be a short circuit somewhere in the wiring harness.
Jack knew that the E39's electrical system was notorious for being complex, with multiple control modules and a Can Bus network that connected them all. He decided to start by checking the wiring diagrams and schematics for the car's electrical system. schema electrique bmw e39 top
After a few hours of searching, Jack finally found the problem. A faulty wiring harness had been installed by the previous mechanic, causing a short circuit that was affecting the IKE module and the wiper circuit. The next day, Jack decided to investigate further