Thank you crutschow. My understanding of electronic circuit diagrams to low but I am familiar with automotive 12v circuits so please bear with me.
Will that circuit do as I stated in post 8: Leaving aside for a moment the components that are in the circuit diagram, allow me to add further info on what the LED is supposed to do, which you no doubt know anyway. It's supposed to illuminate when the key is turned on and stay on until a couple of seconds after the bike moves off (after the ABS ECU has detected no faults) - providing there are no faults eg, flat tyre, and stay off until a fault is detected. ?
I also do not know what signals the LED to extinguish when the bike moves off after the system detects no faults. Perhaps you or someone else may. If so, how? Will your circuit enable this, or the 555, or.........?
Secondly, the original author, who's work I'm trying to emulate, sates in post 6: Basically the indicator LED for the ABS system in the meter unit is connected to the positive rail of the battery (12v). In order to make it illuminate and signal the rider, the ABS ECU momentarily drops the blk/wht wire (which runs from the meter/cluster LED to the ABS ECU) to almost ground (almost 0v ) which lights the indicator LED and passes information about the state of the brake system to the rider.
After a bit if digging in the Kawasaki ZZR1400 manual this confirmed in the electrical section 16.69 where pin 6 of the meter circuit is listed as ABS LED ( - ).
Lastly, the active pulse to illuminate the ABS LED is of a very short duration. So short as to be impractical as an indicator.( around 0.01 seconds). This was solved using a pulse stretching circuit ( known as a gated monostable) where a short signal in produces a longer signal out. In the case 0.01 seconds in makes 0.5 seconds out.
The blk/wht wire at pin 6 (rear of meter/cluster) is momentarily earthed by the ABS ECU. Is that what your diagram is showing at the left side?
Thanks in advance to helpers.