GPS Speed wire?

[timelinex]

In my previous truck (Tundra), I was able to make a button that allowed me to type during driving and watch the rearview. The way I was able to do it is by putting a button that along the wire that relayed speed information to the GPS.

Has anyone identified which wire that goes to the 12" Uconnect is the wire that relays location/speed info?

I want to be able to press it so I can constantly watch the rearview while trailering.

I do know that there are all-in-one aftermarket solutions out there, but I don't want to spend 500+ if it's as easy as modifying one wire.

(I have the 2020 3500)

 

[waveslayer]

Or buy a naviks cabling harness and use all the Cameras etc



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[Jimmy07]

In my previous truck (Tundra), I was able to make a button that allowed me to type during driving and watch the rearview. The way I was able to do it is by putting a button that along the wire that relayed speed information to the GPS.

Has anyone identified which wire that goes to the 12" Uconnect is the wire that relays location/speed info?

I want to be able to press it so I can constantly watch the rearview while trailering.

I do know that there are all-in-one aftermarket solutions out there, but I don't want to spend 500+ if it's as easy as modifying one wire.

(I have the 2020 3500)

There isn’t one. The speed is communicated to the radio on the canbus C network, which is why a man-in-the-middle device is required that modifies those messages.