The lude only uses a one wire d4 control.The accord uses a 2 wire.Pin 18 is a illumination cancel to blink a code for an accord.The lude dose not use this.

Try it if it doesn't work just but connect them back together.

I will explain the continuity test when we get there.I would be the last think i could do for you and then we hit a brick wall for the d4 light.I would have hoped i could have fixed that for you too but the accord and lude d4 light control are vary different.

So try it and then we will do are last step hopefully we will get some where.Its been fun so far.