1999 ford f-150 xlt factory wiring harnesses

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=4004
Printed Date: May 17, 2025 at 12:41 PM

Topic: 1999 ford f-150 xlt factory wiring harnesses

Posted By: H2OUW8N4
Subject: 1999 ford f-150 xlt factory wiring harnesses
Date Posted: September 27, 2002 at 8:34 PM

The factory am/fm/cassette in my truck has two (2) wiring harnesses connected to it .... one is a rectangular sixteen pin (16) harness and the other is a square twenty one (21) pin harness (three (3)rows of seven (7) pins) ... i bought a wiring harness to wire an aftermarket headunit and it plugs into the rectangular harness .... what is the square harness for? ... if i leave it disconnected will it effect any operation of the truck? .... i don't think that this year/model truck offered a factory amp option and the owner's manual and window sticker do not mention a premium sound system ... thanks for any help in advance

Replies:

Posted By: Velocity Motors
Date Posted: September 27, 2002 at 9:33 PM

I think the 21 pin harness is for the OEM changer.

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

Posted By: H2OUW8N4
Date Posted: September 29, 2002 at 9:00 AM

thanks for the help Jeff ... keep up the excellent posts ... since i don't have the OEM changer installed it shouldn't disrupt anything if i just leave the harness unplugged, right?

Posted By: Velocity Motors
Date Posted: September 29, 2002 at 9:15 AM

Yes, leaving it unplugged will do nothing to the indash player.

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