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Basic Head Unit Install Question

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=12199
Printed Date: May 18, 2025 at 7:03 PM


Topic: Basic Head Unit Install Question

Posted By: p1209
Subject: Basic Head Unit Install Question
Date Posted: April 14, 2003 at 2:42 PM

Connected my wiring harness from my Clarion Head Unit to the aftermarket adapter harness to plug into the factory wiring of my Durango.  The HU has 2 yellow wires on it one with a 15a inline fuse marked "Memory Back Up Lead" and the other yellow wire has a 2a inline fuse and is marked "Bus Power Lead".  Which wire to I connect to the Yellow "12 Volt Constant Power" wire on the adapter harness?

Thanks!




Replies:

Posted By: speedwayaudio1
Date Posted: April 14, 2003 at 2:55 PM
the 15 amp "memory back up"

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Big Dave



Posted By: wrencher_25
Date Posted: April 16, 2003 at 2:57 AM
I believe the  BUS power lead could possibly be for an accesory turn on.

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Andrew Weitzel

MECP First Class Installer



Posted By: esmith69
Date Posted: April 16, 2003 at 1:32 PM
My guess would be that the bus power lead is for powering components like fm modulators, satellite radio tuners, or video master boxes. i.e. anything that would be located relatively close to the head unit, and requires very little current to operate.


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