after you lift the hood look on top of head light assembly you will see 3 black taps they are steel flay pin about 5 inched long pull each one striaght out and whole assembly comes out twist bulb socket, also use a little build grease and make sure to check vent plugs as moisture buils up in thre
See the following site:
You replace the bulb the same as a 1998, which is answered further down the page.
the headlight assembly needs to come out in order to change the bulb ive had to do that to my 98 as well.
We have a 1998 Bounder Motorhome (with ford engine) how do we replace the headlight switch?
There are two clips on the wall that holds the headlights. Push the clips away and pull the headlight housing out.
the bumper will have to be removed.
the headlight assembly needs to come out in order to replace the bulb.
To replace the headlight assembly on a 1998 Isuzu Trooper, first, open the hood and remove the screws or bolts securing the headlight assembly, typically located at the top and side. Disconnect the wiring harness from the back of the assembly and carefully pull the old assembly out. Insert the new headlight assembly, reconnect the wiring harness, and secure it with the screws or bolts. Finally, test the new headlight to ensure it functions properly.
If you can't get to the back of the light assy you have to remove it from the vehicle and the bulb screws in.
changing the bulb
How to replace 1998 Toyota corolla headlights
drop the bumper and take the headlight housing out