Thanks for the suggestions, guys!

I managed to work around this issue by plotting the route and searching for and adding filling stations and waypoints in Google My Maps (https://mymaps.google.com), while checking leg distances with Google Maps on the second screen.
At the end of that, I generated ...

Hi, all,

Okay, so the situation as it stands is this.

I - and two friends, all of whom use Garmin GPSs - want to do a 1000-miles-in-24-hours Iron Butt run around the Southern Cape.
To do this successfully, we need to navigate a rather circuitous route.
To be able to do that , I need to generate a ...

Success! :D

The rest of the ribbon cable and its connectors work fine. The corroded power connectors were bypassed with very fine-gauge wire, and soldered to the ribbon-cable pins:

20221108_112439.jpg

20221108_112419.jpg

My 500 charges just fine through the repaired mount.

I asked the chap ...

Update:
I found a repair-shop owner (specializing in flat-screen TVs) who says he can more than likely do the job.
The ribbon cable has non-standard dimensions (no surprises there - what fun would it be for Garmin if every pleb could repair a broken unit themselves?), but my guy says that removing ...

Not sure if this will help or not...

https://www.ukgser.com/forums/showthread.php/374905-Garmin-Zumo-500-not-charging-(but-it-should)-Help-needed!


That's my post. :)

After thinking I'd lost my 500's faulty powered mount, I found it in my new workshop, at the bottom of a cardboard box I hadn't ...