Hello and thanks for using Just Answer.I will try my best to help you with your question.
I just want a little clarification. You have no rear parking lights, or no brake lights or turn signals?
You may have a poor connection near the rear of the truck under the rear bumper on the drivers side. The front parking lights are on the same circuit as the rear. Disconnect the connector under the bumper on the drivers side an check for any loose pins and clean out any corrosion. Check for power with the parking lights turned on on the BROWN wire in the connector. That wire is for the parking light circuit.
Below is the connector. Make sure you have power on the brown wire circled.
Attachments are only available to registered users.
Also check and see if the tag lights work.
Below are the diagrams for the lights.
CLICK HERECLICK HERE
This is where most of the electrical problems with tail lights occur. This connector is the most susceptible to water and the elements.
This is the connector where the tail lights on the bed of the truck join the main harness on the frame.
This is where we always start when you only have problems with the rear tail lights, turn signals and brake lights.
That is why I started there.
Ok. Thank you for the update.
I do apologize for my answer sounding the way it did, it was not intended to be that way.