When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Well my headlight issues are back. Woke up this morning and my right side parking lights were on, got in the car and the headlight switch was in the "0" position. I turned the switch to "A" and then back to "0" and the light went off.
I started the car and the headlights came on with the high-beams, so I switched it to "A" and back to "0" to see if they would go off, they did not. The sun was coming up so it wasn't really dark at all.
Anyways with all that, I will hook up my Autel scanner later today to see if there are any codes. What's confusing to me is that when I look in the owner's manual the switch they show is different than the one I have, the switch in the book does not have the "0" position with I believe is a zero and represents off?
It doesn't turn anything off though. In my experience "A" means flicker between DRL and low-beams at random. "0" means the DRL are on and the low-beams come on at night.
Now your lights are being switched ON at night while the car should be in low power mode.
I re-read this whole thread for background consideration... Something is causing your F-SAM to act up while it should be asleep.
We are going to run out of simple tricks very shortly. I would try to exercise your light selector module back and forth as I am sure you did that a lot already! It is built around insulated carbon tracks and a set of wipers engineers thought should work dry without any anti-oxidation grease. It is powered 24x7 to message the F-SAM relays, so it has great habilities to cause your light show.
At the end of the day I think your F-SAM circuits are going to need consideration & TLC.
Consider floating your main battery so it does not get drained to death by restless modules.
Last edited by CaliBenzDriver; 10-04-2021 at 02:03 PM.
I did not replace the switch as it seemed to be fine. I actually ordered one from mbparts.mbusa.com (bad idea) but it was under a part group number (multiple parts one number) and they cancelled the order and said I need to reorder all the parts individually instead. I don't know whats up with that, at that point it was working fine so I just continued on.
I ran the scanner and I noticed two :
State: Historic A Bus Keepawake Unit Was Detected
State: Historic An Implausible Signal From Switch "Exterior Illumination" Was Received.
I saved the output of the scan so later this evening I am going to hook the scanner up to my laptop and see if I can share that.
well, the right parking lights on is indicative of the switch being one position left of "O" , so if your sure your switch was in "O" it sounds like a short in the switch. also the high/ low beam issue seems to corroborate that diagnosis, if in fact it was light enough outside to turn off the windshield sensor calling for lights to be on? That was LCG's thought in # 9 and I concurred in #10.
I believe with the car locked and off, the light switch still has power, especially with right side parking lights on, could this be why the bus keep awake/ F-Sam was powered up? And spit out a code?
So that seems fairly useless? I am going to mess around with the scanner and see what else I can get.
per DIN 72552 (automotive circuit numbers, most all german cars follow this standard)...
circuit 30 - unfused always on battery power
circuit 15 - switched ignition power (on with ignition or start)
circuit 58d - instrument lighting dimmable circuit
I do not see 30G or 15R/15X as being part of the standard, although I think I've seen them used before (15R is powered on in ignition OR aux, 15X is powered in ignition ON but NOT when the starter is engaged). AH, apparently 30G goes off some hours after the car is shut down and locked.
You can easily UNPLUG the light switch out of the circuit and see if your F-SAM glitches its own light show without any switch command -or if it does get back to normal.
(Only plug your Sw back in if/when you do need lights ON)
Disconnecting the SW will give you a confidence level towards "switch likely good" -Or "switch likely acting up".
I am unfamiliar with your exact switch style that incorporates the Fog position and a "0" position.
I know it does not switch any power by itself.
I forgot what style of connection this switch uses to message relay controller @F-SAM (busy CAN-B -Or dedicated wiring)
✌️
Last edited by CaliBenzDriver; 10-08-2021 at 02:49 PM.
So after watching various ways to tear up your dash that seemed way too complicated for the headlight switch, I found a video that shows the proper way of turning all the way to the left then pulling out on the switch and your done. Very easy. Guy in the youtube video had the same problem with the city/parking light just coming on.
I'll leave it out for a few days and see if the light stays off. If so I will order the part. As far as I can tell the part number for the switch assembly is: 212-905-73-02
Thanks again, probably should have just replaced the switch as pointed out in the earlier posts.
Don't beat yourself up, these cars are complicated, difficult to diagnose even with a scanner and all the systems seem to be intertwined. Hopefully you got it this time! Whats more, they made this car for seven years, all different in small ways!
Last edited by pierrejoliat; 10-07-2021 at 02:46 PM.
The most left side P with left and right arrow is for parking single eye front and rear light.... left or right and not both, and must be WITH KEY OUT OF IGNITION.
With key in ignition even without turning it to position 1 , that light wont be activated.
That is how it works in my car.
ZERO is daylight by default and can not be turned OFF, unless in instrument cluster menu I turn it off.
Sometimes ON with key insert and ignition posistion 1 or 2 I forgot and guaranteed ON with engine running.
I by accident, using Xentry messed around with what they call light DEMO MODE.
By the time I unplug the laptop, the parking light BOTH sides stay ON forever and cant be turned off...Car Show Mode I guess
So I went back to kill that mode with Xentry Pass Thru.
Check if your iCarsoft V3 has that feature and who knows it was accidentally activated somehow, albeit you are getting only the right side parking light, which I assumed FRONT & REAR.
Well my headlight issues are back. Woke up this morning and my right side parking lights were on, got in the car and the headlight switch was in the "0" position. I turned the switch to "A" and then back to "0" and the light went off.
I started the car and the headlights came on with the high-beams, so I switched it to "A" and back to "0" to see if they would go off, they did not. The sun was coming up so it wasn't really dark at all.
Anyways with all that, I will hook up my Autel scanner later today to see if there are any codes. What's confusing to me is that when I look in the owner's manual the switch they show is different than the one I have, the switch in the book does not have the "0" position with I believe is a zero and represents off?
It doesn't turn anything off though. In my experience "A" means flicker between DRL and low-beams at random. "0" means the DRL are on and the low-beams come on at night.
Turn DRLs OFF in the cluster menu and then "0" will turn all lights OFF even in dark.
Hi
So I have a question regarding the IWC clock for C63 2017.
the clock just stopped moving @5 and when ever I try to change the time in the car it just stays the same.
I opened the center console checker the wire it was connected properly.
tried removing and reattaching it again but still no use.
08-13-2021, 01:20 PM
