How do I hard wire a 12V accessory

PJayUK · 07-02-2009, 09:51 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, 09:54 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, 10:00 PM

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

07-02-2009, 09:51 PM	#1
PJayUK Hardcore MB Enthusiast Join Date: Oct 2008 Location: Surrey, United Kingdom Car: ML320 W163, E320 W210 & Jaguar X300-XJR6 Posts: 497	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. __________________ Current Mercedes ML320 W163 LUX Mercedes E320 Avantgarde W210

07-02-2009, 09:54 PM	#2
gbjeppm Hardcore MB Enthusiast Join Date: Oct 2006 Location: Surrey Car: W208 CLK320 Cabriolet Posts: 1,071	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

07-02-2009, 10:00 PM	#3
PJayUK Hardcore MB Enthusiast Threadstarter Join Date: Oct 2008 Location: Surrey, United Kingdom Car: ML320 W163, E320 W210 & Jaguar X300-XJR6 Posts: 497	Yep, I think so... Only the command is a bugger to remove

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