I looked at the wiring diagrams and those two circuits should be on two different fuses.
The shift lock solenoid is powered by the 10amp turn signal fuse and the 15amp stop light fuse. If the fuse blows when you put it in park, I would say the shift lock solenoid is the problem and the stop light fuse is the one that is blowing.
The heater fan and relay are powered by a 60amp fuse and a 15amp fuse but not the stop light fuse.
Its possible there is a short some where that has connected these two circuits.
You could disconnect the shift lock solenoid to see if the fuse still blows.
SOURCE: 2002 Chevy 1500 has problems shifting out of park
ck to make sure all brake lites are working. (could be faulty brake lite switch). if so, do you hear a click in column when applying brake to pull out of park? could be the start of bad shift interlock solenoid.
SOURCE: 2002 Dodge Neon 20 amp FP/ASD fuse #21 keeps blowing
It appears that it is part of the fuel pump circuit, so I would concentrate on wiring harness & connector at fuel pump, clean it real good, and apply dielectric grease to the connection, as well as the fuel pump relay, connector & harness.
SOURCE: How to remove electric fan in a 1999 Chevy Cavalier
Make sure you don't have delco loc 2 or theftloc audio system before disconnecting the battery. You should be able to do this by contacting your local dealer and they run the vin and tell you.
disconnect battery
unplug connector from fan motor
remove bolts holding fan shroud to radiator
pull assembly up to dislodge the holding tabs then guide the assembly out from the car
make sure all wiring is unplugged
carefull not to contact the radiator fins they are sharp
remove the fan retaining bolt from the assembly
install is reverse
Hope this helps
SOURCE: I have a 1998 chevy blazer (s-10) 4.3L 4x4 it
check transfer case electrical switch, sometime if it bad it will also blow the fuse. don't recommend you put any higher fuse than recommend, If the fuse blow there is a short some where and by putting higher amp fuse you might short or burn something else beside the fuse. if that check out than check your transfer case motor, might lock up and not allowing the motor to turn instead it short the fuse. don't drive the car, just leave it in park, put correct fuse amp back in and unplug transfer case electric switch and turn the key on (dont start the car) and see if the fuse blow; if not plug it back in and see if it blow the fuse. if that is not the case, unplug transfer case wire, and do the same and see if it blow the fuse.
SOURCE: keeps blowing 30 amp fuse to the fan blower.
Well, something downstream may be damaged and grounded, or the motor itself has deteriorated, causing excessive draw.
In the table below you'll find the fuse location and description of the fuses of the driver side under-dash fuse box on 1.6L and 1.8L 1993-1996 Toyota Corolla.
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