I figured it out. There is a red ring around the lamp that clips on the lamp. If you use something like a puddy knife or a screwdriver to pop it off, there are 4 screws behind the ring that hold the lamp on. There is nothing replaceable except the complete unit.
My backup lamp on the right side and the trailer lamp connector are dead when in reverse. The right side will illuminate for a fraction of a second and then goes out. The left side works fine. This is not a bulb issue, there is no voltage present at those points. According to the only wiring diagram I have been able to find, the left side wire label ends with TR and the right-side ends with ST. I would think there would only be one hot wire from the chassis for the backup lamps that feed the circuit.
Has anyone else encountered this issue?
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