It is located on the right side below the gas cap.
no 84 and 85 swap out.
where is dash light and tail light relay on 1984 nissan pickup truck
85 and some 86
no 84 and 85 change out.
check out ebay.
The filter is located under the cab near the driver side door you should be able to see it very clearly.h
on your brake pedal lever,its a switch,easy to remove ,just unscrew bolt and disconnect wire.
look in the gas tanke may have sock on fule pump then follow the fuel line and replace all filters may have more than one
Get your alternator tested at autozone,its free,and check your battery too.
get a webber 32 36 carb.