Montana Motorcycle Charging Problems Custom wiring

Hi guys,

im running into a problem trying to run my Montana 700 on my rally bike. I purchased the motorcycle charger for it and it came with lots of wiring for all kinds of stuff like serial data and mic. I shortened the wires, removed the mic output and I’m only utilizing the positive and negative wires

On paper it should work. I wired the positive cable up to my AmpLink which is sending 12v & 15amps to the charger but when I put the Montana on the charger it doesn’t register power. I used my voltmeter to verify there is power coming to the little charging pins on the charger.

At this point I’m not sure if its an issue with voltage or amps or what is going on, do you guys know of anything else to try?

0 ConiKost over 2 years ago

Your Montana needs to have 5V. 12V is too much, because original cable has an 12V->5V converter.

0 CaveDiverFL over 2 years ago in reply to ConiKost

Hmm that’s interesting. I’m using the converter that came with it, I wonder if its defective

0 atlas_cached over 2 years ago

There is a third trigger wire that the cradle uses to verify the Montana is in the mount before sending voltage. What did you do with this wire? There are wiring diagrams for this available online if you Google for 'Montana 7x0 GPS archive'.

0 CaveDiverFL over 2 years ago

So here is what I did to streamline the whole thing. I cut out the entire harness and converter since it wasn’t working for me and just added a inline 5v step down RC unit and hardwired everything to my bike. Works like a charm!

0 2wheelsinmotion over 1 year ago in reply to CaveDiverFL

Perfect solution, thanks for going to the effort of posting

0 Borderterrier over 1 year ago in reply to ConiKost

https://support.garmin.com/en-GB/?faq=JRkf9YOuUf4qibnQi2MYGAHave you seen this?