2 prius 12v batteries replaced lost radio presets on only one.

Check the label on the battery, it should have a date on it.

 

Oh no, if a battery was swapped, presets will should disappear.

 

they should hook up a 12v source to the jump point under the hood, when changing the battery. this will keep the presets. what years are they?

 

Oh so it is possible, but why do it on one and not the other, strange???

 

In any case you should a have a warranty in place, check your receipt/invoice

 

two different mechanics? one bright, and one not so...

 

lol, that certainly can happen

 

the other thing i was thinking, and the reason i asked what years they were, maybe the gen 3 has a way of retaining preset memory, and gen 2 doesn't?

 

Maybe you can do it and show your hubby

 

Any chance that whether presets are retained during the battery swap depends on the length of time between disconnecting the older one and connecting its successor?

 

I'll be doing this myself and with some 75 preset locations, I'd like to keep them.

Where are these jump points?

 

Did both swaps by myself on a 11 and 12. Took my time and did it right. The battery is easy to get to BTW. A good battery is better than a radio station any day of the week.

 

the positive is inside the fusebox. take the cover off and you'll see a red plastic cover. it flips open, and there's a jump post with metal on one side. for the negative, any bare metal in the engine compartment will do.

 

If you have a jump pack with an accessory outlet, there are cables you can get, run from that outlet to the OBD port, to maintain power. The cable will typically have LED indicators too, so you can verify the connection is ok, at both ends, before disconnecting the battery.