Need to change parking light fuse - 2003 Ford Ranger Regular Cab

IN THE FUSE BOX. (CAB OR BAY_)
THE OLD USERS GUIDE AND THE SERVICE MANUAL COVERS FUSES.
PARKS = TAILS
PARKS ARE FRONT REAR. BOTH
SO ARE BOTH ENDS OF CAR DEAD FOR PARKS?
THE FUSE IS MARKED "TAIL"
AND RUNS ALL 10 PARK LAMPS ON THE CAR.
THE PARK FEED TO TAIL OF CAR PASSES TROUGH A LIGHT FAILURE SENSOR ON 4 REAR TAIL LAMPS ONLY
THE SENSORS IS OPTIONAL AND NEEDS FUSE "GAUGE" NOT BLOW TOO., THIS OPTION SO FITTED, HAS CLUSTER LAMP CALLED
"REAR LIGHT " WARNING

REPOST AND TELL WHAT ALL 10 PARKS DO.
OTHER WISE HUGE WORK DOING THE HARDWAY

FRONT, REAR AND SIDE MARKER ARE ALL PARK LAMPS
THE LEGACY NAME TAIL IS STILL USED BACK TO 1920.
SO IS A TRADITION BUT BIG TIME CONFUSING WITH 10 LAMPS.
LIKE SAYING MY FRONT TAIL LAMPS ARE DEAD., SILLY.

That's your fuses check the accessory fuses they're also labeled parking accessory is the fuse you need to change on that one and make sure you don't put a higher fuse than what it requires

The gear shift is fused with the park lights. If the park lights/dash lights are working, it will most likely be a burned out bulb

the fuse marked park. license plate lights are usually on the park light circuit. if your park lights work then you more than likely need to change the globe. the door of the fuse box should have a diagram telling you which fuses are for what

You are replacing parts but you should be focusing on wiring. you will need to physically check all the wiring for the rear tail lights and the front park lights for shorts to ground. you can also unplug all of the bulb sockets, replace the fuse, and see if it blows. if it does than it is in the wiring. If it does not than plug the sockets back in one at a time until the fuse blows, then inspect or replace that socket.

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verify that you do not have condensation or corrosion in the light sockets. if you do, they sockets need to be replaced. your fuses are blowing most probably due to a faulty ground caused by corrosion (rust).

NEED TO CHANGE THE BRAKE LIGHT SWITCH

It isn't typical for the parking lights to be controlled by a relay. These are mostly wired directly from the main lighting switch via a fuse unless it is a multiplexed computer controlled system. If so the Haynes wiring diagram will be needed for deeper investigation.

I suggest you begin by checking the fuses.

check the parking lights fuse

if it is only your tail and instrument lights you need to replace your park light fuse in the fuse box...