Indicator only indicates left on 1992-2002 Isuzu Trooper?

Being super-tall, I have always liked the Trooper for its roominess.

I've never owned one, but I have repaired indicator stalks on other cars.

Do not be fooled by thinking it is just the stalk.

Sometimes it is a faulty indicator relay. This may either be separate from the hazard relay, or a secondary set of contacts on it.

On some vehicles the relay is impossible to get at inside the dash. In older cars it used to be under the hood/bonnet on the firewall - much easier.

My plan would be to check the wiring harness on the old and replacement stalk to find the common and L and R contacts.

Then use a jumper wire directly into where the stalk connector would plug in. Be very careful here. Safety glasses, no bare skin. Burns and sparks! Use 18 gage (thick) insulated wire and heavy alligator clips. Or salvage pins from a similar connector - we don't want you welding and wrecking the connector by mistake.

If turn indicator still does not work with jumper, then it may indeed be the relay. Report back, I'd like to hear how this goes. Either way it is a fun way to spend an Autumn Sunday. You'll learn a lot and I bet you will succeed in fixing it. Best wishes.