Does anyone have a way to maintain power for the memory for the ECM when I change the battery??

Is there a way to hook up a 9volt battery through the cigarette lighter?

Thanks for any help

 

The cigarette lighter on a H-D, unlike most American cars, is active only if the ignition switch is on. This means that the lights will be on too and a 9 V battery will not last long, if it works at all. A small 12 V battery or battery tender connected to the battery connection that is to be removed would work better.

 

I wish a 9V battery would help me keep my memory...

 

THANKS for the info

 

Doesn't the ECM retain its memory without power? Thought they were EPROM's. You may lose your radio presets, but that should be it?

 

I could be wrong, but I would check with the MOCO on this one. ECMs are programmed with "flash" memory, much the same principle as a memory stick or jump drive. They do not need power to maintain their memory. If that were the case, every battery change or dead battery would require reprogramming the ECM.

 

Only thing you will loose is the preset channels on your radio.

 

My battery died two weeks ago and my bike fired right up when I put the new battery in. The ECM uses flash memory like a car so you don't need to worry about it losing its memory.

 

Thanks all it is much appreciated