OK, so the formatting on this table is lost when I paste it in here, but this is the TCU pinout and wiring colours
15599 1 FS_MIC+ Mic + GE
X15599 3 CMD/DATA GE
X15599 5 DATA+ SW
X15599 6 Data- In GE
X15599 13 SE11 Talk? SW
X15599 15 K Bus K Bus WS/RT/GE
X15599 17 30<39 Fuse F39 10A RT/GE
X15599 18 30<39 Fuse F39 10A RT/GE
X15599 19 FS_MIC- Mic - SW
X15599 21 Mic Sheild
X15599 32 CHARGER RT/GE
X15599 33 TELON Tel On WS
X15599 35 R<7 Power on (?) VI/WS
X15599 36 31E<8 GND BR/SW
X15599 37 TELNF+ Audio Out+ SW/BR
X15599 38 TELNF- Audio Out- SW/WS
X15599 39 Sheild BR/SW
X15599 46 WS
X15599 51 TELM Mute GE
X15599 52 58G LCZ pin 1/Illumination GR/RT
X15599 54 31E<8 GND BR/SW




Where
RT Red
SW Black
GN Green
BR Brown
GE Yellow
WS White
VI Violet
GR Grey
BL Blue


Check you have the key colours in place for PWR, GND, IBUS, MIC, TEL Audio and Mute.