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best place to get 12v, headrest tv

Printed From: the12volt.com
Forum Name: Mobile Video, GPS, and Navigation
Forum Discription: Mobile Video Head Units, DVD Players, LCD and TFT Monitors, Navigation, GPS, PS2, PS3, XBox, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=90718
Printed Date: May 12, 2025 at 10:51 AM


Topic: best place to get 12v, headrest tv

Posted By: samuelsteven
Subject: best place to get 12v, headrest tv
Date Posted: February 20, 2007 at 3:03 PM

When installing screens in the headrests, where is the best place to get 12 volt power?



Replies:

Posted By: DYohn
Date Posted: February 20, 2007 at 3:10 PM
From the alternator...  OK, I know that was a smart-ass answer but it's true.  The best source for power for any add-on is to run power cable from the battery positive post with proper fusing.

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Posted By: samuelsteven
Date Posted: February 20, 2007 at 3:35 PM
Ok , but how do i know what proper fusing is? Will the specs say so that come with the monitors?



Posted By: swerve
Date Posted: February 20, 2007 at 3:39 PM
most monitors i've ran into have some sort of fuse coming off of them, if not it should say in the manual somewhere.

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git yer swerve on!



Posted By: master5
Date Posted: February 20, 2007 at 3:56 PM

If you install dozens of these a week on a "production" basis we tend to look for the quicker, easier places to grab power...still keeping safety, reliability and professionalism as job one.

Now keep in mind the current draw of a headrest screen is very small...as you may have noticed by the fuse rating that comes with it....so connecting to the battery itself is not at all required or nessecary. 

The next thing to keep in mind is that most people would wish the monitor to turn off when the key is turned off...so you really want to hook this to an accessory wire tapped from the ignition harness. If connecting constant 12v wires you can also grab this at the ignition harness.

Now keep in mind as well that some...but not many vehicles today do not have the voltage, current or even the correct polarity at the ignition harness. If you are unlucky enough to run into one of these and do not know for sure the correct places to tap power wires for 12v (these tap points exist but not everyone knows where they are depending on the vehicle) then by all means go to the battery....better safe then sorry.



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