Thread: Using TMC in Garmin nuvi for free

Originally Posted by itzbinnice

Another problem I’m having is resetting the FM table. I see 8 entries, I then hit “Reset”, it clears all the entries, then slowly they come back, one by one.
No new ones, just the ones I had cleared. It seems they are stuck in the GTM20’s memory. HOW CAN I FIX THAT?

You would need to drive in a different area. They are not "stuck", this is how they are supposed to work. FM tables are filled automatically with the radio stations carring the traffic signals in the area arround you.

The "1527,0,0,0" didn't do anything for my 765 or 855.
I have inputed the codes with units on desk. On 1390 with GTM25 (USB) that is not possible since it doesn't get "back" the power from the USB port.