MTFCA Forum

Your current wiring is a mess. I would completely remove it and ignore everything about it. Install the new harness according to the wiring diagrams posted above. To do any less, would be repeating past errors and "work arounds". Also, forgive me if you already know this, but T's have a negative gr...

Thanks. So to be clear, on my existing ammeter, on one post, (the left post in the rotated photo), the ammeter is connected to the switch and the generator, the other post is connected to the battery.

My new harness is color coded like this. So, I'll just rewire to match these diagrams.

I'm preparing to rewire this 26 TT. The existing wiring is a bit of a conundrum. Let's start with the ammeter to switch panel. all the diagrams I've seen have the battery wire directly to the ammeter, then jumped to the switch, then back out to the car. (Solid Yellow to ammeter, Yellow black jumper ...

Hold up. As I look at the diagrams again, and stare at the car.....my comments/observations don't make any sense. How could the car run the way I've claimed? I'll look it over again and come back to this thread.

Thanks for the welcome and your patience.

Wow, thanks all. I have the Service manual, and have looked at all the diagrams. All other wiring seems to be correct, other than the mag wire direct to the coil box. I thought maybe they bypassed the switch because it didn't work. Some of the switch to power block wiring has been patched and repatc...

My wife recently inherited a 1926 TT. I, as the make-believe mechanic, am finding this simple machine to be a bit more complex than I thought. The car starts and runs on the battery just fine. However, when switching to magneto it shuts off. I have not yet created the light bulb tester, so don't kno...