|
|
|
#1
|
|||
|
|||
Head Unit Wiring Question
I want to turn the head unit on while the car is off.
I tried running a simple two-wire push button switch between the black and red (constant and switched) wires. That didn't work. It didn't do anything. I thought I could just add power to the switched line, and it would pop on. Nope. Has anybody done this before?
__________________
1982 300CD Petrol/Black Leather |
#2
|
|||
|
|||
1983/300CD,
What is a head unit? U need to explain what U are trying better to do to get an asnwer. P E H |
#3
|
||||
|
||||
a Head unit refers to a stereo head unit. I.e. stereo with CD player etc.
IF you take your aftermarket head unit and run a wire from the battery with a 15A fuse and wire it to the switched lead on your head unit (red wire in most cases) you can have power to the unit.
__________________
91 350SD 14 F150 Eco 19 Fusion Hybrid 11 GT500 |
#4
|
|||
|
|||
So, sometimes it's better to go to your actual installation manuals than to read wiring descriptions in the forum archives.
So, I think my problem is that the constant power is supposed to be YELLOW, not black. The old posts I was reading speak of black being power, and brown being ground. My head unit's installation instructions specify black as ground, and yellow as power. I guess I was hooking power to ground. Oops. I better go change that.
__________________
1982 300CD Petrol/Black Leather |
#5
|
|||
|
|||
I separated the red (switched) power wires where they were connected.
I then connected the red wire from the car (not from head unit) to the far end of a 3-post switch. From the middle post of the 3-post switch, I connected the red line to the head unit. The last post connects to the yellow (constant) power source. I can now switch between "switched" and "constant" power source to the head unit's "switched" power in.
__________________
1982 300CD Petrol/Black Leather |
Bookmarks |
|
|