Try cleaning the ground wire on drivers side of the core support on the very top. All these items are on the same fuse so disconnect them one at a time till you find it... guages,warning light, turn signal, back up lamp, seat belt timer, inhibitor switch, and rear window defogger. I would check the back up lamp and the defogger first.
Chances are there is a short somewhere in the wiring
If the dash lights on a 2000 Nissan Pathfinder are not working, it could be due to a blown fuse, a faulty dimmer switch, or a problem with the instrument cluster itself. Start by checking the fuse related to the dashboard lights, typically located in the fuse box. If the fuse is fine, inspect the dimmer switch to ensure it's functioning properly. If both are in good condition, the issue may lie within the wiring or the instrument cluster, which may require professional diagnosis.
instrument panel lights for 1998 ford explorer the fues is good and when dimmer swtich is good
The brakelight switch, wiring, bulb holder(s) or bulb is shorting out.
A short in the wiring.
short circuit on trailer light wiring
A short in the wiring (grounding out)
Circuit overloaded, short in wiring, or the fuse you are using is not the OEM correct fuse.
Short in the wiring or inside one of the plugs.
I had the same problem with my 95 pathfinder, fix by checking all of the connections on the wiring harness that run by the rear bumper to the fuel pump on top of the gas tank. Mine were salty and dirty.
The wiring color code for an amplifier in a 1998 Nissan Pathfinder is blue or blue and white. This is the amplifier turn on wire.
Short in the wiring. If you have a trailer wiring harness check it for frayed wires. The tailight circuit and the dash lights share a circuit on many vehicles. I hope this helps you. Mark