3rd Brake Light Problem

[Stellantis Fan]

My Jeep 3rd Brake Light (CHMSL) is not working and I am looking for some help. It worked in its original form. I used a small 4x4 shop to mount the new rims/tires and part of the tire mounting included removing the CHMSL to allow the larger tires to fit the spare tire mount. When it was picked-up, the bracket for the CHMSL was unbolted from the tailgate, sitting in the rear cargo area with the wires cut.

I bolted the CHMSL back onto the spare tire mount in a modified fashion to extend above the spare tire and made-up new DT connectors to reconnect the wires (WHT/GN and BLK). The light does not work.

1. Checking for a ground connection between the BLK on the CHMSL and the RH tail light, I see no continuity
2. Checking for voltage when the brake pedal is pushed down I do not see voltage with the engine OFF or RUNNING, measuring between the two wires at the CHMSL

At this point I am uncertain if there is a GND problem or an output power problem at the ECM (controller). I will make up a long jumper to get me back to battery GND and check this all the way back to the battery to make sure it is not a different harness/GND connection along the way to the CHMSL.

Before I go break-out the parts cannon or give-up and take it in, are there other things or quircky things about the CHMSL?
Can anyone please advise on where connector XY480A is located?

SFK

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[dapipp]

You may have a two part issue. I am not sure why they would of cut the wire rather that disconnect it from the light but the connection at the light is not the best and that may be your biggest issue. I cut the wire on my CHMSL to add a Deutsch connector and extension into the mix so I could remove the light easily from its new position after changing the spare mounting method. I chose not to remove the plug from the light since it was not the best connector. There is no reason cutting the line and reconnecting should not work. Check the light connection carefully.

 

[Stellantis Fan]

Fixed the problem. Found another thread and it included a picture of the tailgate w/o the interior panel in place and connector identification near the tailgate latch. Taking the panel off, I found the yahoo that did the work pulled that connector off. reconnecting it makes the CHMSL work just dandy. Based on the harness diagram, I figured XY480A was the only connector in the circuit but alas, there was another!

Stop Lamp Diagram

Additionally, I found a connector diagram on this forum but gee-whiz, it does not seem to make sense and the XY480A connector looks weird. It is also not very descriptive in the tailgate area.

Connector Diagram

SFK

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