Citroen C2 I gen. - C2 Connection of the Motokey lock control panel.

The discussion focuses on connecting a Motokey 500 lock control panel with two remote controls to the central locking system of a first-generation Citroen C2, where central locking is originally controlled by the key. The main challenge is adapting wiring differences between the Motokey 500 and the Car Protect BX40 control panel, for which wiring diagrams are provided. It is clarified that both BX40 and Motokey 500 connect to the positive control line, but wire color codes differ (BX40 uses yellow and yellow-black; Motokey 500 uses yellow-black and blue). Successful connection requires matching these control wires accordingly. Additional technical details include identifying Citroen C2 BSI connector cubes: cube No. 2 (black) for turn signals, cube No. 3 for permanent +12V alarm supply, and cube No. 1 for central locking control. Locking and unlocking wires are identified as white (pin 13) and brown (pin 15), respectively, with a recommendation to verify with a test light before cutting. Adjustments to locking time (from 0.5s to 3.5s) may be necessary by removing a jumper on the control board. Some users report issues such as blown fuses or overheating cables when connecting to BSI pins 13 and 15, indicating possible wiring or load problems. The discussion also briefly touches on a related Citroen C3 BSI Valeo unit with turn signal wiring challenges, but this is outside the main focus on the C2. Overall, the key solution involves careful wire color matching, correct BSI pin identification, and verifying control signals to integrate the Motokey 500 with the Citroen C2 central locking system.
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