Further functions of the junction box electronics

As well as an electronic function, the junction box electronics also has a connector function. Many of the wires that are connected to the junction box electronics are connected with each other.

The junction box electronics has internal and external relays. The excitation coils on all relays are continuously supplied with a positive wire. The positive wire for the external relay is provided via the load line, which is to be switched through. The positive wire for the internal relay is provided via the secured supply line of the junction box electronics. All relays are controlled via the negative lead. All internal relays and the relay for wiper stage 1 and wiper stage 2 are located downstream of the fuse on the relevant current path. All other external relays are located in the current path, upstream of the fuse.

Internal relays are:

• Relay for the window drives
• Relay for the central locking system

The external relays are:

• Relay for electric motor, rear window wiper
• Relay for electric motor wiper stage 1 and wiper stage 2
• Relay for headlight cleaning system
• Relay for heated rear window
• Bi-stable relay (deactivation of standby current violation)