Greetings everyone, It seems that nobody has come to a resolution despite the abundance of posts concerning DRL concerns. Assuming I am successful in solving it, I will see to it that this one does as well.
It is a 2019 C43 S205.
Listed here are the headlights: A2059069505 from Multibeam.
I was travelling when the dashboard started flashing error warnings about a problem with the side lights, turn signals, and parking lights. I pulled over to inspect something, and the passenger-side DRL was flashing and the indicator wasn't functioning. Both the passenger-side rear cluster and side mirror indicators worked perfectly when I was behind the wheel. The car's indicator switching was lightning fast. The drivers' side is functioning normally. I left some silica packets in the headlight overnight because it had some dampness. When I turned on the left-hand indicator this morning, the DRL began rapidly switching on and off, and then it either stopped working altogether or flickered intermittently. This happened during the first start of the day. After realising that the DRL module is the tiniest of the three on each headlamp assembly, I swapped out the old, broken headlight with the spare this morning, but it still didn't work. Low and high beam operations are not affected by this.
After looking for a signal at the plug, I was unable to find one. Using a multimeter, I was expecting to pick up an alternating current between 0 and 12 volts on one of the plug wires. Make sure the 12v power source is available. After switching the modules, I reinserted the previous headlamp into the socket, but it didn't work either. I don't think it was a valid test, though, because the two major modules were missing from that headlight.
Thus, the crux of my question is:
Is it possible to use a multimeter to detect an oscillating voltage at the main headlight connector when the indicators are turned on? I have previously verified that my 12v supply and ground are fine. Tomorrow I can try it on the driver's side to make sure it's true.
(B) Assuming the previous point is correct, is it possible to trace the same wire back to the SAM module and check there as well? The present thinking is that it's a problem with SAM. Additionally, I can't seem to figure out if the SAM module is in the passenger side cabin or up near the battery.
B162A64, B16EF64, U118A08, and U118A67 are generally communications-related issues that I've discovered during scanning.
Would really appreciate any advise you can provide. PS: I like to troubleshoot on my own before taking it to the shop, so please don't advise that I do so; I will do so if I am unable to resolve the issue, but I am not giving up just yet.
Notify me if any more information is needed.