Remove connector.
Insert sufficiently long wires at each connector and connect with them "+" and battery packs.
If it is quiet, then the sound signal has a defect.
If the signal makes a wheezing sound or is completely silent, it can sometimes be repaired by turning the adjusting screw on the back of the signal.
Remove the sealant from the screw.
After adjustment, close the screw again with a sealing compound to protect it from moisture.
The horn device has an adjusting screw on the back side (2) under a plastic cover. The wire "1" comes from the sound contact in the relay; via cable "2" voltage is applied to the sound signal.
Light signal
If the warning light does not work, although the headlights are on when the lights are on:
Check if the red or red-yellow cable is energized (terminal 30), leading to the lever switch.
If so, check if the light switch in the toggle switch works.
For dismantling the switch, see the section "Removing the switch", chapter "Devices".
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