You can pick up an aftermarket display/controller:
https://electrobikeworld.com/products/35a-controller-rad
https://electrobikeworld.com/products/kt-lcd8h-color-for-rad

I know rad might've said the controller, but also ask about a replacement display if you can get one. I've observed screen failures here on the forums with much greater frequency, matching the symptoms you've described.

Right now automotive companies can't guarantee delivering cars to dealerships. Logistics issues across the board make it difficult to nail down any sort of reliable schedule.

Oh. Well that's a little different. Check over your wiring harness for loose connections, both off the handlebars and underneath. Unplug and plug. Particularly the plug for the battery. One of the wires may have worked themselves loose.

Controller issues can happen, but aren't too common. Most of the electronic problems seem to come from the display, usually that's an all or nothing deal where it'll just stop working forever and need to be replaced.

Maybe. It could also be a throttle issue. Does yours have the throttle with the push button on/off? And does the screen always remain on, or goes blank?

You know it's funny. I just had my Rad City out on a trail in the woods today. Got back home, washed it off, oiled up the chain and stuck it back in the garage.

I see a lot of folks out here use rovers for fishing as well.

Just don't drown 'em.

There's some work done here on the BMS:
https://www.radowners.com/index.php?topic=1075.0

To my knowledge nobody has documented the wiring harness yet though.

From the testing I've done the harness runs battery voltage up to the handlebar display. I imagine that'd be the line that burned up.

You can reach out to customer support for a replacement part, especially if it's still under warranty. Otherwise, I don't know, maybe JB weld the mounting loop back together.

Interesting. It almost smells like a corroded connector or something.

What happens if you turn on the lights without them plugged in? Still have throttle?

Does it stop throttling if you turn off the lights whilst accelerating?

Edit: You said "PAS", is that exclusive to pedal assist or does it also affect manual throttling?

Yeah, maybe move up market and price higher. See that in sales a lot, especially when the paycheck to paycheck folks starts gravitating inbound.

Not that uncommon. Start with adjusting your brakes or having your brakes adjusted:
https://radpowerbikes.zendesk.com/hc/en-us/articles/115004786874-Brake-Adjustment-Guide

I wonder though, if this is an electronic problem with some controllers. Maybe there's a relay in there that handles disconnecting the motor when the brakes are applied.

Quote from: wheelsurf on September 25, 2021, 07:58:40 AM
I have  Rad City bike, hardly ever runs, yes error 25 comes up, but why doesn't Rad do something major to make this issue go away. I cannot use the bike because it always stops working and peddling a heavy e bike up hill at 70 years old is not something I cherish. I doubt I have 1 hour on it, so far, the bike is useless.

So error 25 can represent a couple of conditions related to brake sensing. The easiest to trip is just having the brake lever active on startup. If one of the circuits are closed it'll trip the error, and releasing the brake is usually enough to clear it. Other conditions are related to electrical faults, whether that be related to perhaps activating the brake light or maybe a short somewhere in the wiring or circuitry. It's a difficult thing to diagnose, even presumably for Rad, when it seems to be sporadic and largely based on anecdotal evidence.

The best thing to do is attempt to narrow down which components are faulty. For example unplugging the taillight cable at the controller. Testing each of the components listed in the troubleshooting guide: https://radpowerbikes.zendesk.com/hc/en-us/articles/360010543453-Error-25-Troubleshooting-Guide

If we knew which models specifically are observing issues and roughly when they were purchased as well. Maybe there's a pattern there.

And yeah, some of it does rely on Rad. For example they have the source programming and schematics to see specifically what conditions are met to trip this error.

Quote from: NeedSomePower on September 24, 2021, 04:40:03 PM

Quote from: DCH3416 on September 24, 2021, 04:18:01 PM
Only other thing that comes to mind. Unplug and plug the motor cable. Maybe that's slightly loose and it's causing intermittent faults. It would match why you're observing no throttle and PAS. Also the display does not error out for that condition as it would for if say a brake lever was stuck or other general electronic fault.

Thanks for this tip. Is it obvious where this connector is?

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Yeah it's the big connector on the back left hand side of the bike, the side with the brake rotor. Runs right next to brake line from the rear caliper. You might have to clip a zip tie to get some slack to unplug it.

Quote from: NeedSomePower on September 24, 2021, 03:21:23 PM

Quote from: DCH3416 on September 24, 2021, 01:35:46 PM
The brake light should only come on when you're pulling the brake lever.

When this issue happens, does immediately turning your bike off and back on fix it?

No.

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Only other thing that comes to mind. Unplug and plug the motor cable. Maybe that's slightly loose and it's causing intermittent faults. It would match why you're observing no throttle and PAS. Also the display does not error out for that condition as it would for if say a brake lever was stuck or other general electronic fault.

The brake light should only come on when you're pulling the brake lever.

When this issue happens, does immediately turning your bike off and back on fix it?