Repair Methods For Wiring Harnesses - Ah00.19-P-1000-04A
MODEL ALL
Repair method summary
The following methods have been approved by Daimler for repairing wiring harnesses on Mercedes-Benz cars:
Repair methods:
- Crimping
- Solder connection (Raychem)
- Axial solder connection (Raychem)
- Combination of Raychem and cable tail
- Soldering
- Rapid connection technology
- Flat conductor pliers
Application
Individual cases must be analyzed in detail to decide which method can and cannot be used to repair wiring harnesses (wires, contacts and connectors).
Crimping repair method
In crimping, a cable is stripped off beforehand to a distance (a) with the aid of a preformed die, the cable is then crimped to the contact pin using special pliers. Crimping is performed quickly and with ease. A special crimper is required.
Only cables up to 4 mm2
may be crimped.
Raychem repair method
With this method, special solder connectors are used. The solder connections contain the solder and they also feature insulation and a seal. A special hot air blower provides the heat required for soldering and shrinking the insulation. A special reflector is fitted to the hot air blower.
The temperature for this repair method is 400 °C.
Raychem is the manufacturer of the solder connectors that are required for this method. The Raychem repair method is mainly used for integrating repair wiring harnesses (cable tails).
Combination of Raychem repair method and cable tail repair
Cable tails are prefabricated partial wiring harness kits available as Mercedes-Benz replacement parts. They have the appropriate cable cross-sections and crimped contacts. The Raychem repair method is to be used to integrate the cable tails into the wiring harnesses.
Use cable tails for cables from 4 to 10 mm2
only. As from 10 mm2
the wiring harnesses have to be replaced.
Soldering repair method
The strands of the cable (2) are soldered in the solder contact (axial or radial version) (1) using a soldering iron. Commercially available solder is used for the soldered connection. This method is only used for repairing connectors.
Repair method using rapid connection technology
This method uses special rapid-connection wire connector blocks. Mercedes-Benz permits the 2-, 4-, and 6-pin versions. They contain tin-plated rapid connection contacts, which are pressed together to touch the wires of the cables using pliers. The lines do not have to be separated or stripped.
This method can be used for connection to cables with a cross section 0.35 to 0.75 mm2 and as an end-to-end cable connection.
The rapid connection method must only be used inside the vehicle or in the trunk because the connection is not watertight. They are not permissible for CAN lines.
Flat conductor cable repair method
Select crimp contacts in the wiring harness repair kit and insert into the tool head of the open manual crimp pliers (2). The flat conductor cable (7) must make contact with the tool head, and the correct edge of the flat conductor cable (7) must make contact with the adjusting stop (3). The optical adjusting device (4) in the manual crimp pliers (2) must be fully visible between 2 conductor tracks. Press the manual crimp pliers (2) together all the way. After it has been pressed down all the way, it can be opened again. Remove the finished crimp connection.