The bulb comes loose from the socket. Remove the tail light lens and push it back in. You may want to wrap some electrical tape around base of bulb to give it a tighter fit. I just ordered new sockets because it seems to happen randomly. I have learned to check my tail lights on a regular basis after I was pulled over for not having any tail lights. Fortunately, I did not receive asummons. Good luck.
I found this information on Ebay. There are cd's with all info. about Frontier's for sale cheap.
In the electrical section of a haynes manual or possibly you could buy e book from internet
diagram electrical civic dx
The drawing of an electrical circuit is called a circuit diagram, or schematic diagram. It is a graphical representation of the electrical components and their interconnections in a circuit. It uses standardized symbols to represent different components such as resistors, capacitors, transistors, switches, and wires. The lines connecting the symbols in the diagram indicate the flow of electrical current through the circuit. Circuit diagrams are used to design, troubleshoot, and repair electrical systems, and can be found in technical manuals, books and online resources.
When changing anything electrical in a car, it is important to have a diagram. An electrical wiring diagram for this car can be found in the maintenance manual.
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From your local library.............
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A digram that shows the layout of something electrical