How do I hard wire a 12V accessory

PJayUK · 07-02-2009, 10:51 PM

Getting close now with my IPOD integration project. The Harman and Kardon unit has three wires for power. a Red marked ACC/Ignition Switch, Yellow marked +12V dc and black marked GND. The yellow and black seem straightforward but I am unsure what the red one is for.

My plan was to take the feeds from the rear of the cigar lighter to the black and yellow connectors but I was hoping that someone could offer some advice on where I should hook up the red acc/ignition switch wire (or could I simply leave it for the time being?)

Thanks all.

gbjeppm · 07-02-2009, 10:54 PM

The red should go to the switched 12 v feed which can be found at the cigar lighter.

The yellow needs permanent 12 v which you could get from the back of the radio.

Ground is ground.

Does that help

PJayUK · 07-02-2009, 11:00 PM

Yep, I think so... Only the command is a bugger to remove

07-02-2009, 10:51 PM	#1
PJayUK Hardcore MB Enthusiast Join Date: Oct 2008 Location: Surrey, United Kingdom Car: ML320 (have to admit it, I really like it!) Posts: 368	How do I hard wire a 12V accessory Getting close now with my IPOD integration project. The Harman and Kardon unit has three wires for power. a Red marked ACC/Ignition Switch, Yellow marked +12V dc and black marked GND. The yellow and black seem straightforward but I am unsure what the red one is for. My plan was to take the feeds from the rear of the cigar lighter to the black and yellow connectors but I was hoping that someone could offer some advice on where I should hook up the red acc/ignition switch wire (or could I simply leave it for the time being?) Thanks all. __________________ My current cars Mercedes ML320 W163 Jaguar XJR 4.0 Supercharged Subaru Forester 2.5 XTen Previously enjoyed! Triumph Dolomite Sprint Escort 1300e Capri 2.0S Various mid 80's Ford rubbish Mercedes Benz S320 LWB W220 Caterham 7 BMW 320i convertible Jaguar XJ8 Sport Audi A8L And others!.....

07-02-2009, 10:54 PM	#2
gbjeppm Hardcore MB Enthusiast Join Date: Oct 2006 Location: Surrey Car: W208 CLK320 Cabriolet, W163 ML500 Posts: 1,070	The red should go to the switched 12 v feed which can be found at the cigar lighter. The yellow needs permanent 12 v which you could get from the back of the radio. Ground is ground. Does that help __________________ Matt W208 CLK320 Convertible W163 ML500 Previous Mercs: W202 C230 W124 300CE

07-02-2009, 11:00 PM	#3
PJayUK Hardcore MB Enthusiast Threadstarter Join Date: Oct 2008 Location: Surrey, United Kingdom Car: ML320 (have to admit it, I really like it!) Posts: 368	Yep, I think so... Only the command is a bugger to remove __________________ My current cars Mercedes ML320 W163 Jaguar XJR 4.0 Supercharged Subaru Forester 2.5 XTen Previously enjoyed! Triumph Dolomite Sprint Escort 1300e Capri 2.0S Various mid 80's Ford rubbish Mercedes Benz S320 LWB W220 Caterham 7 BMW 320i convertible Jaguar XJ8 Sport Audi A8L And others!.....

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