Hi,

I'm looking at doing some 2-way radio installations on a 2010, and disconnecting the battery seems to have implications on the ECU with having to relearn fuel strategy/security system....etc. Has anyone out there used one of those 9V battery connectors on the cig lighter when replacing the battery or doing electrical work?

I'd definitely like to avoid deploying the airbags with this electrical Tom Foolery.

Thanks,

JD

 

It worked just fine on the 10+ vehicles I've tried it on. Plus some aftermarket stereo head units.

 

This is the most important reason against using them. The safest thing to do is disconnect the battery, do your electrical work, then reconnect it. If the PCM is disconnected long enough to lose memory, it doesn't take long for it to relearn.

Once you pull the battery cable, wait at least 30 minutes before starting the project. There's a capacitor that stores power to keep the bags functional should power be lost in an accident.

 

Seems like sound advice. I just don't want to have to be towed into the dealer because the alarm system decided to go haywire because of a battery disconnect. Lots of stories out there, but no firm advice. I actually asked the service manager at the Ford dealer if I needed to do anything special when reconnecting the battery, and he looked at me as if I were nuts.