No power when key at ACC
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=58003
Printed Date: May 16, 2024 at 9:07 PM
Topic: No power when key at ACC
Posted By: DERIK999
Subject: No power when key at ACC
Date Posted: June 18, 2005 at 10:25 PM
I just bought a new Pioneer cd player (DEH-P4700MP), and have a small problem. I have a 2001 Hyundai Elantra.
I've wired the player's harness to the factory wiring harness, and hooked the the wiring harness to the unit in the car, but the player doesn't work.
After hunting around, checking wire connectivity etc. I have narrowed it down to a dead wire. The yellow constant power source wire works fine, I tested it with a DC detector, no problem. However when I turn the key to the ACC position, there is no power detected at the wiring harness that is connected to the car itself (red wire). The cd player seems to be the only instrument in the car that uses that Accesory line, so I couldn't compare other instruments.
When I hooked up the wiring harness to the car (but didn't hook the end into the cd player itself) and tested the CD Player end, the constant power source worked fine, and the red ACC low and behold did not work.
What I want to know is who should I go to in order to have this checked out, the dealer or a car audio place? I'm assuming the problem lies somewhere in the ignition wiring.
Also, is it possible that there are other wires that only come on in the ACC position (don't want to drain the battery of course) that I could possibly tap into?
Replies:
Posted By: 91rsliberty
Date Posted: June 18, 2005 at 10:44 PM
connect the constant 12v cable in the car to the YELLOW & RED (constant & ACC wire) then also connect your earth to earth and plug the deck in... then you will see if you deck works or not if not try taking acc power from cig lighter clock or straight from the back of the ignition barrel. but you will have acc power on the factory loom for the cd player its just a matter of finding it if not check all your fuses to make sure you havent blown one with out noticing it ??? 
Posted By: DERIK999
Date Posted: June 19, 2005 at 12:56 AM
I ended up hooking the ACC wire into the ACC of the cig lighter and everything works now. For some reason that one ACC wire was just dead. I had to splice some wire in between but it worked out ok. I tried the DC Detector on the old ACC wire and it registered nothing, the cig lighter however registered that there was power.
Posted By: auex
Date Posted: June 19, 2005 at 12:57 AM
You probably had a blown fuse.
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