Topic: M-Unit Troubleshooting/Aux 2 flashing

[Noah1981]

Hello all, I got my ‘76 CB550f Back from the shop and there seems to be something wrong with the m-unit. The input side of Aux-2 is flashing, all other lights on the unit are off. There are also some times that the m-unit will not power up at all. Seems random. On the occasion that it does power up properly, I can use some buttons by just touching them and not actually pressing which leads me to believe it’s a grounding issue.. the answer to all this probably lies in knowing what a flashing Aux-2 means. Thanks in advance!

[Noah1981]

Bad battery voltage or poor ground.

The battery reads 11.67. Too low?

[Noah1981]

Way too low

Thanks! Would that also explain the weird touch sensitivity on the switches?

[Noah1981]

What buttons are you using? Some momentary buttons activate the MU differently with different push sequences. Press and hold, you get a function. Press and release, a different function from the same button.

A motone 3 button switch like this. It’s being activated/deactivated literally if I just touch it.

[Noah1981]

That makes a ton of sense to me. Thanks for all your help.