10amp fuse keeps popping

Fuse's are in the under hood fuse box . LR PARK fuse 10amp plus RR PARK fuse 10amp . Brake lights work , back up lamps , turn signals ?

this is for the base model

FUSE PANEL IDENTIFICATION (1983-90 LINCOLN TOWN CAR) The fuse panel is located in the instrument panel to the left of the steering column. To expose fuse panel, remove lower steering column finish panel.

Fuse & Circuit Breaker Identification

· 1 - 15 Amp Stoplights, Hazard Warning Lights, Speed Control Module, Trailer Tow Relays, Cornering Light Relay (1983-89)
· 2 - 8.25 Amp (Circuit Breaker) Windshield Wiper/Washer
· 3 - Blank
· 4 - 15 Amp Taillights, Side Marker, License Light, Parking & Coach Lights, Cluster Illumination, Trailer Tow Relay
· 5 - 15 Amp Turn Signal & Back-Up Lights, Trailer Tow Relay, Cornering Light Relays, Heated Rear Window Relay, Rear Defrost (1988-90), A/C Clutch & ATC Module (1990), Load Leveling (1990)
· 6 - 20 Amp Heated Rear Window Control, Speed Control Module & Clock Display, Illuminated Entry Module, Power Window & Police Accy Relays, Fuel Filler Door Release (1983-87), A/C Clutch & Cornering Lights (1983-89), Deck Lid Release (1987-90), Tripminder
· 7 - 10 Amp Daytime Running Light Resistor (1990)
· 8 - 15 Amp Dome LP-Clock, Key Warning Chimes & Electric Mirrors, Courtesy & Visor Mirror Lights, Autolight & Illuminated Entry Modules, Tripminder, Electronic Radio Memory, Trunk & Underhood Lights
· 9 - 15/30 Amp Heater Blower (15 Amp), AC/ATC Blower (30 Amp)
· 10 - Blank
· 11 - 20 Amp Radio & Power Antenna, CB Radio
· 12 - 20 Amp Door Cigarette Lighters, Power Seats & Door Locks (30 Amp), Tailgate Power Window (1983-89)
· 13 - 5 Amp Illuminated Outside Thermometer, Instrument Panel Lights
· 14 - 20/25 Amp (Circuit Breaker) Flash-To-Pass, Sun Roof, Power Windows
· 15 - 10 Amp Taillights, Parking, Side Marker/Coach, License Lights
· 16 - 20 Amp Horn & Front Cigarette Lighter
· 17 - 15 Amp Electronic Cluster, Message Center
· 18 - 10 Amp Warning Indicator Lights, Throttle Solenoid Positioner, Low Fuel Module & Autolight System, Dual Timer Buzzer & Electronic Chimes, Electronic Message Center

Check the fuse. A bad bulb can cause a fuse to blow.

I had the same problem, turned out to be trailer wiring harness.Removed harness and replaced fuses, now I can shift and all lights work.

The wiring diagrams on 2000 and newer models are not easy to read sometimes, but it shows a 30amp park lamp fuse and a park lamp relay. The relay is controlled by the PCM. There is also a 10amp Int - Park fuse. I think the small fuse is inside the passenger compartment and the large fuse is in the engine compartment box.
You may have to get a shop manual to get the diagrams to be able to check each circuit.

I would check the ground wire for the parking light circuit, especially around and in the light socket where you replaced the bulb.

Heres a picture of fusebox,and listed is the fuse locations,1) 10amp left low beam light
2)10amp rt low beam light
3)10 amp instrument& license plate light
4)15 amp, rear wiper
5)15amp frt washers and wipers
6)20amp A/C fresh air fan.
7)10amp rt tail & side marker lights
8)10amp left tail & side marker lights
9)20amp rear defroster &heated mirrors
10)15amp fog lamps.
11)10amp left high beam
12)10amp rt high beam
13)10amp horn, rad fan run on
14)15amp backup lights (m/t),power mirrors,heated seats,heated washer jets,cruise control (m/t)
15)10amp engine electronics,coolant pump run on(v6)
16)hazard signals,glove box lite,shift lite
17)10amp turn signals
18)20amp fuel pump, oxygen sensor
19)30amp a/c, rad cooling fan.
20)10amp brake lights,cruise control.
21)15amp dome light,cigar lighter,locking system,multifuntion indicator,clock,vanity mirror.

The headlight power wires are probably touching the taillight power wires.

If it only happens when you turn the switchto the parking lights then it is most likely the swich that is the problem. Light swich failure appears to be a common fault with fords