hyp

Hey.

I've just hardwired a dashcam from the fusebox in the boot (trunk) of my W204 saloon.

All is great, but it's not turning off when I switch of the ignition. I've run the cam from the rear power window fuse as I figured they only work when the ignition on, but the cam still seems to.

Am I being stupid here? Tell me if you need any more info and thanks in advance.

bentz69

https://mbworld.org/forums/c63-amg-w...iring-diy.html

hyp

Thanks. My set-up is the same, except my runs from one of the 30 amp window fuses (on the rileftght in your pic). I'll give the cigarette lighter fuse a try in the morning - will the power to that one be killed when the ignition is off though?

bentz69

yes. cigarette lighter only has power when the ignition is on.


keyless go ALWAYS has power

hyp

No keyless go for me anyway

Will switch the fuses tomorrow and let you know how it goes.

Cheers.

bentz69

if you need a constant power source just use a multimeter to find one.


if your unfamiliar with them, follow these easy steps


turn the car off
remove a fuse
stick the positive end of the meter into the fuse slot
find a grounding source for the negative end of the meter
if the meter reads 12+ volts then you found your source


but that aside, sounds like you needed a switched 12v source which would be the cigarette lighter fuse. good luck

hyp

Switched over to the cigarette lighter fuse and all is working a treat. Potentially some sort of relay on the power window circuit? Who knows...

Thanks again for the help.

alfster1

Hard Wire connection tapped to Fuse 151. A BlackVue PowerMagic Pro should be able to be hardwired similarly. (installed in ML350 - fuse box located under rear right passenger seat)

***
This is how I hard wired my dash cam. I have since replaced the ground connection with a larger wire washer.