Cigarette Lighter Wiring

[AirPost]

Hope someone can help me decipher the 4 wires at the back of my 97 C230 cigarette box. I see 1 brown, 1 red/blue, 2 black/blue. I need to splice into the wiring so I can get power for an electronic device. Thanks.

[RemoLexi]

just follow the way they go ... two of them go to a light bulb and two go the the cig. lighter.

I spliced the two that go to the cig. lighter for my underdash lights.

this requires removal of the ashtray assembly.

[AirPost]

Thanks for the reply. I followed the wires and with a multitester found out the following although still not 100% sure:

Red/Blue wire = +12Vdc (?)
Brown wire = GND
Black/Blue = ACC

[chaddeus]

For future reference, I'm pretty sure the Red/Blue is the Illumination wire. And the black/blue is the 12vdc. Brown is ground.

If you're tapping the cig lighter, I assume it's already on an Accessory-keyed fuse, thus there is no Accessory/Ignition line.

If you tap into the Red/Blue Illumination line, whatever you're plugging into the cig lighter will only turn on with your lights on.

[Logic]

the over all best way to get power for any device is at the ignition . i wouldn't suggest the fuse box since thats the noisest part of the car. being a professional installer for over 12 years i would suggest this. although catching the lighter may be ok make sure the device your hooking up have some type of fuse on it to protect your cars wiring