Radio Install: Vehicle Speed Sensor Connection

wkelley70

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Joined
Aug 28, 2018
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29
Location
Eagle, ID
I have a radio inbound from Crutchfield and just received the install instructions via email.

One of the connections being detailed in the instructions is from the radio to the VSS (vehicle speed sensor) line at the PCM. This new to me.


VSS.jpg


Must I make the VSS connection at the PCM, or is there a point inside the cab where I can make the connection?
 
I haven't ordered cameras yet, but the radio that I have coming in supports them. I will eventually add a backup camera and possibly a front facing camera. I don't want to run the extra wring right now and am out of Jeep money after buying the radio.

I just found this right after my original post:
https://wranglertjforum.com/threads...eed-sensor-wire-and-parking-brake-wire.70367/

It looks like the speed sensor at the transfer case may be a possible connection point. It is not exactly inside the cab, but I might not have to go through the firewall. Also, I have a SpeedoDRD that I need to install anyway.
 
I haven't ordered cameras yet, but the radio that I have coming in supports them. I will eventually add a backup camera and possibly a front facing camera. I don't want to run the extra wring right now and am out of Jeep money after buying the radio.

I just found this right after my original post:
https://wranglertjforum.com/threads...eed-sensor-wire-and-parking-brake-wire.70367/

It looks like the speed sensor at the transfer case may be a possible connection point. It is not exactly inside the cab, but I might not have to go through the firewall. Also, I have a SpeedoDRD that I need to install anyway.

I don't think it's a concern until you add the cameras.
 
I would think it to be related to an auto-volume adjustment w/ increased speed rather than having anything to do with the camera function.
All the RVC needs is a simple trigger from the reverse lights/trans switch.
 
I would think it to be related to an auto-volume adjustment w/ increased speed rather than having anything to do with the camera function.
All the RVC needs is a simple trigger from the reverse lights/trans switch.

The camera cable also supports a dash cam. Those usually provide speed in the recording, it may be for that.
 
The camera cable also supports a dash cam. Those usually provide speed in the recording, it may be for that.

good thinking.

I, a seeming contradiction in that I code for a living but am becoming more tech-illiterate by the day, figured it was probably some safety thing to make sure you weren't watching a movie while you blast through a school zone.
 
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good thinking.

I, a seeming contradiction in that I code for a living but am becoming more tech-illiterate by the day, figured it was probably some safety thing to make sure you weren't watching a movie while you blast through a school zone.

I've always wired my radios to play at any speed. Has to do more with the brake wire IIRC. We watched DVD's driving the jeep to Moab and back.