Keep blowing park light fuse on inside fuse box

There is short circuit in the wiring of fuse that keeps on blowing.

Which fuse is that ? An where is it located ?
F-22 15amp located in the smart junction box , this fuse powers the park lamp relay . The relay is non - serviceable , soldered to the circuit board inside the SJB . When you turn the park or headlamps on a electical input is sent to the SJB which energizes the park lamp relay . Probably has DTC'S - diagnostic trouble codes in the SJB . Sorry but your best bet , take it to a qualified repair shop.

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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You have a short to ground in the park light circuit..best have a mechanic look at it because its possible the trailer wiring was faulty and shorted out the Smart Junction Box (SJB)...the park lamp relay is controlled by it and the relay is built into the SJB

If the fuse blows, you have a dead short to ground somewhere, likely around the tail lights or parking lights. Try this:

Get a box of the correct fuses.
Remove all tail and parking bulbs and put in a new fuse. If the fuse does not blow, try installing each bulb at a time to see which light assembly causes the fuse to blow.
Let's suppose its the RH tail light assembly. Pull it off the car and check for dirt and damaged wiring.

If this is an older vehicle, there may be wiring damage (due to rust) in the harness under the carpets.

Daytime running lamps control module. Fuse #37 - inside the passenger compartment or under hood fuse box ? Do you know how to use a volt meter an wiring diagram to find electrical problems ? You have a direct short to ground or fuse #37 wouldn't blow. Underhood fuse box fuse # 37 is for the park lamps .Supply's B+ voltage to the daytime running lamps module an the headlamp switch plus 37
PARK LP Fuse
20A
Headlamp Switch, Body Control Module (BCM), and Vehicle Interface Unit (VIU)...
Park, Tail and Marker Lamps
The park, tail and marker lamps, including the license lamps, are turned ON when the headlamp switch is placed in either the PARK or HEADLAMP position, or anytime the headlights are requested. The PARK LP fuse in the underhood accessory wiring junction block. When the headlamp switch is placed in the PARK position, battery positive voltage is applied to the park lamp circuit. The parklamp circuit then applies battery positive voltage to the DRL control module and to all the marker, park and tail lamps. The front park lamps are grounded at G101. The rear park lamps are grounded at G302. The license plate lamps are a part of the rear park lamp circuit and are grounded at G302 The inadvertent power control feature prevents the park lights from remaining on more than 10 minutes if left ON. If the park lights are turned ON after the ignition switch has been turned OFF, or is in the ACCY position, they will remain ON until turned OFF or the battery runs dead.

Finding The Source Of Electrical Shorts In Your Car

The fuse doesn't blow till you turn on the light switch? If it blows before turning on light switch, look for a short to ground between fuse box and light switch.
If it blows after turning on light switch, I believe they make a short finder tool.

does the fuse keep blowing ?? it is also on the same line as the cigarette lighter if the fuse is blowing check that there is nothing stuck in the lighter socket that is shorting it out. Could also be a bad ground wire not makeinig contact.

You have a short to ground on one of the circuits.You will have to try unplugging one thing at a time to find it.Unplug the wiper motor first,then take out the park light bulbs one at a time until you find what is causing it to blow fuses.Water in the bulbs will do it.Shorted wiper motor.More than likely it is in one of the park light bulbs/cicuit.

There is a ground not connected or a wire open that is causing it to blow