First off, your picture didn't come through.
The lights on your MTH locomotive are 6V bulbs, so connecting directly to the TMCC board will make quick work of them. I change to LED's when I do these conversions since I have to change the bulbs anyway. The tender markers will just require a resistor to protect them, and I connect them to the headlight output so I can turn them off, but in normal operation, they're always on.
I suspect the locomotive has a CV board that you could wire directly to the headlight output and it would control all the locomotive lights.
Unless you want to just control the motor with the TMCC, you'll need more than 4 wires in the tether, I use the MTH 10-pin tethers for my TMCC steam upgrades. Typically I use at least seven wires.
- (2) track power
- (2) motor
- (1) chuff to tender
- (1) headlight to locomotive
- (1) smoke unit
If you're considering fan driven smoke, I recommend the Chuff-Generator and the Super-Chuffer II, this will give you 4-chuffs and synchronized chuffing smoke, smoke at idle, Rule-17 headlight, and automatic cab light control.
