Repairing threaded electrical connections — VW

Repairing threaded electrical connections
Special tools and workshop equipment required
Torque wrench
V.A.G 1331
Caution
Risk of damage!
Penetrating fluid, contact spray or grease etc. may not be used for threaded connections.
Missing adhesion in the threads may cause a torque excess and, therefore, the break of the threaded connection.
After cleaning, ensure that threaded connections are dry and bolt them together without applying lubricants.
Note
The grey sanding pads are suitable for light dirt and
“soft surfaces”
. The red sanding pads are suitable for heavy dirt and
“hard surfaces”
.
WARNING
Danger of injury! Comply with the warning notices and safety regulations
Chapter
!
Disconnect battery
Electrical system
Rep. gr.
27
Disconnecting and connecting battery
.
Unscrew captivated nut and remove ring terminal from connection thread.
Check ring terminal for corrosion, dirt, etc.
Select matching adapter and sanding pad for threaded connection from
contact surface cleaning set
VAS 6410
.
Caution
Risk of corrosion!
If the tin coating is worn down to the copper layer, a galvanic cell may be produced which destroys metal and causes faulty repair.
The cleaning process of the threaded connection must be performed step by step and a visual check is necessary between the steps.
Fit adapter onto threaded connection and remove corrosion and dirt with circular motions.
Periodically check the progress of cleaning and clean further if necessary.
Tighten connection and (if necessary) anti-rotation tab to specified torque
Current flow diagrams, Electrical fault finding and Fitting locations
.
Note
Optimum contact is ensured when the bolted components are tightened to the specified torque after cleaning.
Apply appropriate anti-corrosion treatment to threaded connection
Chapter
WARNING
Danger of injury! Comply with the warning notices and safety regulations
Chapter
!
Connect battery
Electrical system
Rep. gr.
27
Disconnecting and connecting battery
.
Perform all given work steps such as window regulator setting, clock setting and radio coding after connecting the battery.