Received my 2 421s today and immediately removed the top off 42103 to start the process of hardwiring a Tsunami sound decoder.
I'm curious as to whether anybody has yet ascertained what the various lighting wires are? (ie: which is common/white marker/red marker etc). The main wires are all self explanatory, so if nobody knows then I will just wire-up the pick-ups, speaker and motor wires, then proceed to experiment with the lights. The only one that should be easy will be the rear headlight as it has 2 straightforward wires.
If anybody is interested, I will be giving-away the 2 standard boards in due course.......I strip-out the standard board and hardwire the Tsunami direct.