Standalone body side wiring used on M52 M54 engines M52B20 M52B23 M52B28 and M54B30 M54B25 M54B20 Simplified wiring MS42 MS43 includes: Ecu plug Gas pedal plug Obd2 plug Out for constant +12V Out for +12V on switch (key position 1) Out for ground (earth ring) Out for RPM gauge Out for alternator lamp Out for oil pressure lamp Out for signal to fuel pump relay Note: Use with a deimobilised ECU, this wiring is for the body side. Note2: Wirings may have differences from the photo shown but same placement.

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