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97 Expedition Remote Turn On

Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=56077
Printed Date: May 01, 2025 at 6:26 PM


Topic: 97 Expedition Remote Turn On

Posted By: darvexwomp
Subject: 97 Expedition Remote Turn On
Date Posted: May 19, 2005 at 9:30 PM

Hi,

I search the forums several times and didn't come with any so here I go!

I am adding a subwoofer to a 97' Ford Expedition with a factory head unit and factory amplifier.  I found the remote turn on lead for the factory head unit, and I want to use it for my subwoofer amp also.  The problem I am having is that the remote turn on lead on has 4.3 volts coming out of it instead of the ~12 Volts I was expecting.  The wire is dark blue in color and is grouped with the other power wires in the harness going into the head unit (It is separate from the harness for the speakers and such) I know for sure that I have the correct wire as I have tried several different test on it some of which included cutting the wire and measuring the voltage straight from the head unit and it was a constant 4.3 volt.  When I cut the wire, the factory amp went off as usual.  Connect the wire back and the amp came on.  Also, when the head unit is switched off, the 4.3 volt output stops.  Turn the head unit back on and the 4.3 volt comes back thus, turning on the amp. I thought that maybe I wasn't reading the voltage correctly so I tried to see if it would close a 12 volt relay, which it did not ( I tested the relay so I know it was good)   

My question: Is this normal for a vehicle such as this or I am hitting the pipe to hard?  I really want a remote turn on from the head unit and not a 12 Volt switched for my sub amp because I drive with the head unit sometimes for the kids.  I know I can order a piece that allows the high level inputs to control a relay for use as a remote turn on lead for an amp.  I am wanting to avoid this if possible.  I

Any feedback on this would be greatly appreciated -

Thanks,
Brian




Replies:

Posted By: Velocity Motors
Date Posted: May 20, 2005 at 9:11 AM
Use the IGN wire from the ignition harness to turn on/off the amplifier.

-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA



Posted By: darvexwomp
Date Posted: May 20, 2005 at 12:07 PM

Velocity Motors wrote:
Use the IGN wire from the ignition harness to turn on/off the amplifier.

Jeff,

Thanks for the information.  I have a bunch of switched leads I can use, but I want a remote turn that works with the head unit.  I don't want the amplifer to be on when the head unit is off.

Thanks,
Brian




Posted By: hawn13
Date Posted: May 20, 2005 at 2:37 PM

if you want to turn your amp on and off for your kids you should just wire the turn on  to a separate switch.





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