Small separate single blue resistor?

Reviewing my leftovers and going thru plans to mop up issues, I found a single small blue resistor in my avionics hardware kit box and don't have any clue what/why/where/etc.

Not any part of the master/engine diode cables - those are both hooked up, just one by itself.

Any ideas?

Like the one below but it has 5 bands and all are red.

Thanks 4 any help.

If I remember correctly this resistor came with one of the Dynon boxes. There is nothing specific about it for the 12 and it does not get used.

its used for the tach pick-up with mags. not need for the rotax

bob burns
RV-4 N82RB