If you turned the ignition on with the instrument cluster disconnect or any other air bag component disconnected it will set a code for the air bag system. This will need to be cleared with either a scan tool or there is a sequence of opening the doors and cycling ignition that can clear it. There are a few different options depending on your year model on YouTube so give a couple a go. It doesn't matter if the vehicle they use isn't a Patrol along as it's a Nissan.
Fuel gauges, start by decking the fuse in the fuse box inside the vehicle. Might need to remove the instrument cluster again and confirm you have reconnected all the connectors fully into lock position.
Which fuse had blown for the headlights? This is strange as the only headlight input in the instrument cluster is the high beam warning light circuit. I would only expect the LHS headlight fuse to blow. Did you disconnect the spot light switch? any chance you have pinched a wire going to this switch?
Fuel gauges, start by decking the fuse in the fuse box inside the vehicle. Might need to remove the instrument cluster again and confirm you have reconnected all the connectors fully into lock position.
Which fuse had blown for the headlights? This is strange as the only headlight input in the instrument cluster is the high beam warning light circuit. I would only expect the LHS headlight fuse to blow. Did you disconnect the spot light switch? any chance you have pinched a wire going to this switch?
