How do I determine a bad fuse for a 2003 Pathfinder? The dash lights do not work all of a sudden.

I think you could use this manual method instead.. My nephew use it to repair my car and it's totally repaired now. Here's the website he bought it from. reliable-store

Start by checking the fuses and then wiring under the dash. A shorted wire could also cause this problem. Or the instrument cluster is bad.

Check for bad bulb.

is there a rheostat switch that dims the dash illumination ,these are usually a wheel type switch , other than that have a check of the fuse for the dash illumination hope this helps

Replace the fuse they should be on the same circuit, ever tow anything?

The fuse should be located in the main chassis fuse panel, on the drivers side, beneath the dash area. Look for a removable panel of some sort. I believe the dash lights may be on the same circuit as your tail lights. If your tail lights still work, you might not have a blown fuse. Check to make sure you don't have the dimmer switch turned all the way down. A lot of people never use their dimmer switches and completely forget about them until the lights inadvertently get turned all the way down. If it's not the fuse or the dimmer, you may have a bad headlight switch or other wiring issue.

If they all stopped working at the same time then it is probably a fuse or possibly 2. Check your fuse panels in the dash and under the hood. The dash lights and gauges should be a fuse labeled instrument cluster or guages, it is probably blown. The other fuse to look for will be the tail light fuse. This is where I would begin.

check the fuse for the cruise control from the driver side located on the left side of the dashborad. Make sure the fuse is not blown out.
If it bad, change it out but make sure it is the same rated fuse.

Good luck

ABS pump went bad.

Check all the fuses,if not a fuse may be a bad ground somewhere.