electrical wire issues? maybe

[Maverick]

my driver side marker comes on and stay lit after I lock the car.
the rear driver side signal bulb doesnt work, the bulb is not burnt out, I tried a few bulbs but nothing comes on.
checked all the fuses, no burnt fuse.

ughhhh,
what's the cause? I can't think of anything

will my car catch on fire because some wires might have high resistance? the last thing I want to see is everything I have in the car get burned into ashes.
I know audi is not complete VW but I have seen several VW caught on fire on I93 from the past year and those VWs are relatively new.

thanks guys

[diagnosticator]

Poor connections/high resistance faults only overheat if heavlily loaded, with high current flow. In the case of the symptoms you described, that is not involved so there is no associated increased chance of an electrical fire here.
The wire from the Central Electric Control Module may be shorted, but in that case the fuse should blow. Most likely is the ground connection to the inop side marker lamp is disconnected/broken, or the connection point to the body is corroded, etc. Also suspect is the CECM itself, being in control of all the exteriour lights. The inop marker and the stuck ON turnsignal lamp may be related to an internal fault in the CECM.
Scan the CECM for any fault codes, if there are code/s post back what they are.
When the CECM fails, various random bizarre malfuntions of the lights, different for each car/failed module, is the typical result. However, a failure of the CECM doesn't always mean that there are any fault codes stored. It's possible that it's faulty regardless. A used CECM can be purchased from an Audi wrecker, or try swapping modules with some other B6 if possible.

[Maverick]

thanks for the reply. I will look into it.

[F16HTON]

If you park the car with the turn signal on, it will trigger the valet light on whatever side the signal is facing.

[Maverick]

need some help guys. now not only the left rear signal is out, I replaced tailights but nothing happened. right now both of my front signals are dead, no matter how many bulbs i swap, nothing lights up.

what do you guys think? my CEC module is dead?
anyone has the part number for the CEC module? where is this module located?

diagnosticator, I scanned the car no codes for central electronics

fuck

[Maverick]

the other weird thing is, when I lock my car, the driver side side marker comes on and stays on.

WTF..
i need help

[diagnosticator]

the other weird thing is, when I lock my car, the driver side side marker comes on and stays on.

WTF..
i need help

That symptom is further evidence that the CECM is wacked.

It's is not unusual for a bad module to have no fault codes.
What ever the internal fault is, isn't something that is a monitored function. OBD type controller fault codes only exist as relevant for the systems controlled, not for the controller internally. Sometimes a bad module won't talk to the VAG-COM or send and receive K-line and or CAN buss messages, so there are
"NO/Missing comms with..." DTCs stored in other controllers.
Scan the central convienience module, IC and HVAC, steering column controllers for DTCs having to do with the CECM.

[Maverick]

That symptom is further evidence that the CECM is wacked.

It's is not unusual for a bad module to have no fault codes.
What ever the internal fault is, isn't something that is a monitored function. OBD type controller fault codes only exist as relevant for the systems controlled, not for the controller internally. Sometimes a bad module won't talk to the VAG-COM or send and receive K-line and or CAN buss messages, so there are
"NO/Missing comms with..." DTCs stored in other controllers.
Scan the central convienience module, IC and HVAC, steering column controllers for DTCs having to do with the CECM.

can you give me the part number for the CECM? where is this module located? can I replace it myself? thank you

[Maverick]

bump.
Actslub9, I remember you said something about this as well. can you help me?

[Maverick]

bump for help

[Jeff]

Scan the CEC module for codes. Do ANY of your turn signals come on, or just the rear? When you try to signal left, does the front illuminate? And if so, does it come up at regular speeds or rapidly?

Another thing I would try to do is to remove your hazard switch, and disconnect it. Then see if the problem still persists. I know on the B5, all your turn signals and relays is located in your hazard switch assembly. The CECM sends a signal to the relays when you arm the alarm, which in turn illuminates the respective lamps. I want to see if the problem if coming from the CECM OR the relay system.

[Maverick]

Jeff, I scanned but no codes.
the only signals that comes is the right rear and the two side markers. no matter what I do, the signals won't come on besides the right rear and side markers and they all BLINKS normally. fak.
when I click lock on my key, the right rear and side markers light up and then that's it. after 1 minute or less after the car is locked, the left side marker comes on and stay on.

Jeff, do you have a part number for the CECM? and do you know where it's located? I need this to be fixed right away since i need to inspect my car

[diagnosticator]

The PN of the CECM is 8E0 907 279E.

[Maverick]

thank you, repped!!!

last question, where is this sucker located?

[diagnosticator]

It is under the driver's side dash, to the right of the fuse box, left of the pedals, and below/behind a horizontal row of single relays.

[Maverick]

I changed the CECM today and it works like magic. all the signals work.

a few issues, my city lights blink when the headlights are on. what should I do to cure this?

and also I am getting many fault codes in channel 09 via vag-com. can any of the 3.0 owners give me the software coding? maybe I recode it, it should help

thanks

[Jeff]

I changed the CECM today and it works like magic. all the signals work.

a few issues, my city lights blink when the headlights are on. what should I do to cure this?

and also I am getting many fault codes in channel 09 via vag-com. can any of the 3.0 owners give me the software coding? maybe I recode it, it should help

thanks

Max,

Are your city lights standard halogens or are they LED's? You will need to code your new CECM if it was a new unit or came out of a car with different options. Your ross-tech software should give you a list of options.

[diagnosticator]

The coding for a 3.0L A4 CECM with xenon headlights, is "01013".

The coding bit value is comprised of the following:

Light sensor installed, Trailer hitch/lighting controller not installed, xenon headlights, USA.

What are the specific DTCs shown for the 09 Central Electric Controller?

To stop the city lights from blinking, the load on the CECM/Parking light circuit must be increased to approximately the same current load as with halogen parking lights. The city lights are powered by the parking light circuit, and replace the parking light bulb in the parking light circuit. The LED city lights are turning ON with the parking lights, but may not like the pulsed DC that is used to determine if there is a failed or burned out lamp. By increasing the circuit load, the CECM should stop checking the parking lights for burned out lamps. To raise the circuit loading, add a 220 Ohm, 1 Watt Power Dissipation Rating resister in Parallel connection with the LED power input and ground connection wire.