To brighten the dash lights on an Isuzu Trooper, locate the dimmer switch, usually found on the dashboard near the headlight controls. Turn the dimmer switch clockwise to increase the brightness of the dash lights. If your model has a specific setting for the instrument cluster lighting, ensure it's adjusted accordingly. If the lights remain dim, check the vehicle's manual for any additional settings or fuses related to the dashboard illumination.
It is possible that there is a problem with moisture causing a short circuit if all the dash lights come on. It could also be a faulty relay or alternator.
Possibly the dash light dimmer, located next to the headlight switch, is turned down. Turn it to brighten the lights.
Just to the right of your headlight switch in the dash is your gauge panel dimmer control . Rotate the wheel up to brighten your dash lights . ( also , if turned all the way up it turns on your interior lights )
do you need to take the dash off
Which lights?
Coolant leaking from the heater core.
the slender rod that projects out from the tachometer, which is pushed to reset the trip odometer...when you turn it, the dash lights brighten or darken.
Inside evaparator case under the passanger side dash
check the ground to the engine block
in the fuse panel.drivers side of dash.
turn the knob on the left side of the steering wheel on the dash. It will brighten the dash, and radio lights by turning it to the right and it will dim the lights by turning it to the left.
Tear the dash out. It may be clogged. Try applying water pressure to the hoses coming of your firewall.