head unit parking brake wire

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=105142
Printed Date: May 03, 2024 at 12:30 AM

Topic: head unit parking brake wire

Posted By: silentblackhat
Subject: head unit parking brake wire
Date Posted: May 31, 2008 at 2:43 AM

Hey guys I have ran into some trouble with installing a CD/DVD Player; its a Legacy LD33MU. I soldered all the harness connections and they are all correct except for the parking brake wire; this one i dont have connected at all.

Heres the problem:

There is power going to the cd player, its just it wont turn on. I hold the reset button down and then quickly put the face plate on and sometimes the LCD screen will flash quick(literally a fraction of a second) and then turn off. Also when I put the front display back on after hitting reset, the front panel's red LED color turns on for a few second then turns off.

My Question:

Do I have to have the parking brake wire hooked up to something for the cd player to turn on? is that why it wont work?

Any other ideas are welcomed... Thanks for your time!

Replies:

Posted By: Alpine Guy
Date Posted: May 31, 2008 at 9:30 AM

Probably no one on here will know anything about a Legacy unit, but I am going to assume that your parking brake wire must be hooked up. Did you read the manual?

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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.

Posted By: DYohn
Date Posted: May 31, 2008 at 9:46 AM

Yes, it must be hooked up properly, read your installation instructions.

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Posted By: jmsounds
Date Posted: May 31, 2008 at 12:43 PM

have you check the voltage on both the yellow constan and the red wire should read 12 volts when swicth turn on last but not least what kind of car is some cars don't have the 12 volts when you turn the swicth on the parking wire is only for watching tv while in park but this wire is not going to prevent the radio from turning on good luck

Posted By: silentblackhat
Date Posted: May 31, 2008 at 1:50 PM

DYohn] wrote:

es, it must be hooked up properly, read your installation instructions.

I read it. It said that if the brake isnt on, the screen should display a message about car in motion...so with the manual saying that, the head unit should turn on in the first place without it being hooked to the parking brake(all the parking brake does when its engaged is present a 'ground' to the wire)

Its a 2005 Jeep Grand Cherokee Laredo. Ill check the voltages on the harness again but i can assure that its wired correctly...but ill check it again

Posted By: i am an idiot
Date Posted: May 31, 2008 at 2:03 PM

The brake wire not being connected will only prohibit you from watching video. You have other problems. As stated above you need to verify that you are getting voltage to the red and yellow wires. When checking this, you need to connect the ground lead of the meter to the chassis of the radio. This will verify that the unit is grounded properly.

Posted By: silentblackhat
Date Posted: May 31, 2008 at 2:10 PM

Ill get to that later this afternoon, im stuck at work right now:-( lol.