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wb6vpm

Installing aftermarket head unit and need a few wires

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I have a base 2013 TC, and I need to know the best place to tap the following wires:

 

parking brake

reverse/backup lamp

Vehicle speed sensor pulse

 

if anyone has pictures or even a wiring diagram, that would be great!

 

Thanks in advance!

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Posted (edited)

I don't have a 2013.  But I have installed a few stereos.  

 

A lot of aftermarket head units have a wire for the parking brake.  This is so that the unit can display video entertainment.  And to prohibit the video display if the parking brake is not set; so that you can't watch videos while the vehicle is in motion.  The units which I installed, if I recall correctly; we simply grounded that wire to fool the head unit into believing that the parking brake was set.  But double check by researching your stereo make & model.  There's usually a "hack" posted online for the installation.

For aftermarket reverse backup cameras, the camera is typically powered by tapping the reverse lamp wire.  This is easiest right behind the lamp socket.  Pull out the lamp as if you were changing it.  Test the harness to ensure that you have the correct wire for power.  Then splice.  On most aftermarket stereos, there is a wire which needs a reverse signal, so that the screen will display the backup camera video.  Most backup cameras have a wiring kit with an extra wire running alongside the RCA video signal, which will deliver the power from the reverse lamp to the head unit.  

 

 

41QwVLug1UL.jpg

 

 

 

The VSS wire sends a series of pulses (from 800 to just over 1,000 per mile) only when the vehicle is in motion. If the VSS wire is not hooked up, the navigation system will not realize that the car is moving at all, and will be unable to track position.  There is a work-around.

 

 

 

Edited by Fifty150

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15 hours ago, wb6vpm said:

I have a base 2013 TC, and I need to know the best place to tap the following wires:

 

parking brake

reverse/backup lamp

Vehicle speed sensor pulse

 

 

With modern vehicles, many times there is no 'wire' you can tap into for the signals you want.  When I installed a Pioneer Nav receiver in my 2014, the only way to get those signals was to use an 'adapter' made for the receiver I was installing.  The signals are on the vans CanBus and the adapter picks them off and sends them to the receiver

 

Don

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Maybe with the 2013, you can also buy the harness adapter.  Then you won't have to splice into any OEM wires.

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