Decided to repost as my original thread took a little detour plus this title seems more descriptive. (But check it out for great info on installing a stereo with HK and NAV!)

I was wondering if anyone has installed an aftermarket stereo in their Cooper that retains power while the engine is cranking, as the factory stereo did. I thought this was a fantastic little detail and would like to retain that if possible.

Just curious if there are any wiring tricks to retain that feature.

Sorry if this comes across as a repost!

 

Nope that was one of the features I lost in the aftermarket also the steering wheel control. But I gained a sweet HU so I guess the trade off was worth it. IMHO

 

It's fairly easy to keep the stereo on while the engine is cranking - it's just a matter of which wire you use for the stereo's "switched +12V" source.

There are plenty of wires that have +12V when the ignition is on, but depending on the car, one or more of them may be temporarily turned off while the engine is cranking. Examples (not necessarily in the MINI) include A/C blower fans, stereo, headlamps, windshield wipers, and any other circuit that may put a drain on the battery. The idea is to maximize the available current for the starter.

Long story short, just connect the switched +12V lead from the stereo to a wire in the car that has +12V both while the ignition is on and while the car is cranking over. Make sure the circuit you use has the current capacity to handle the additional load from the stereo. If you can't find one with enough current capacity, you can use the wire to turn on a relay, and use the relay to provide power for the stereo.

 

Search this forum for mfsw adaptors, and also check out www.newministuff.com. You might find an interface that will restore your mfsw remote capability.

Which head unit did you get?