Audi A4L Cigarette Lighter Can Not Work After Brake Light Trouble Repair

As a automotive mechanics,we frequently encounter the situation that another trouble occurred after you solving one.For example,your customer drive his vehicle model to your garage to ask you add a spare key or repair a fault,when you completing your work and prepare to get your pay,but others trouble occurred.

 

This article show a real repair case on repairing Audi A4L brake light trouble,and after done found the front & rear cigarette lighter can not work.

 

Audi A4L 2011 Brake Light can not work.

This brake light trouble is easy to solve.

Remove J393 module from vehicle,and found the driver chip was damage.

Audi A4L Cigarette Lighter Can Not Work After Brake Light Trouble Repair (1)

Replace the damaged driver chip

Audi A4L Cigarette Lighter Can Not Work After Brake Light Trouble Repair (2)

 

Front & Rear Cigarette Lighter can not work.

The driver found the front & rear cigarette lighter can not work after brake light repairing.

The automotive mechanic detect the problem,but can not found anything related.And consult the Audi 10/11 technical bulletin,can not found any helpful info.

Finally,ask my friend work for Audi dealer help mechanic to solve the problem.

 

Must follow correct order to disconnect and connect the connector of J393 module

 

After mechanic follow the re-connect order provided by my friend,this problem was solved.

 

Correct disconnect order: #1,#2 and others.

Correct connect order: others,#1,#2,#5,#3,#6.

Audi A4L Cigarette Lighter Can Not Work After Brake Light Trouble Repair (3)

Note:

#4 connector 17th pin right rear LED light and brake light control terminal

LED work:1.5~2.0V  Press the brake pedal:11~12V

#6 connector 4th pin left rear LED light and brake light control terminal

LED work:1.5~2.0V  Press the brake pedal:11~12V

 

Why need to follow the order?If you can not ask anyone for help,what you need to follow?

The principle:

Disconnect: weak current cable connector firstly,then disconnect strong current cable connector.

Connect:strong current cable connector firstly,then connect weak current cable connector.

 

Weak current cable connector:signal cable,data communicate cable with weak electronic current

Strong current cable connector:power cable,control cable with strong electronic current.