How to install c-wire adapter with no control board

My furnace has no control board, it says control board functions are integrated with the blower motor. This is what it looks like and the wiring diagram. I cannot figure out how to install the c-wire adapter.

Uploading: image.jpeg…

With the power OFF:

Spread this tangle of wires apart and take another picture. (don’t remove any wire nuts, just space them so that I can see each of the wirenuts and what wires are currently attached to each other)

The brown wire there with the little blue wire attached to it should be C, but it’s much easier to make a full diagram using the correct thermostat wire colors when I can actually see them,

Do you have a picture of the thermostat side of the wires too?

1 Like