I'm replacing the right headlight housing on my 1990 Trooper, so decided to check all of the bulbs while I'm at it. My parking light bulb on that side is out, but I have one on the driver side. It's a small, round bulb. It goes into the same housing as the halogen headlight. The pegs to lock it in are near the base, even with each other. It says 67, sb2 on the base. I wasn't certain this was the correct bulb, so searched online. A general reference page said I need an 1157, which can't be right --- for one thing, the locking pegs are offset at different depths.
Does anyone know if a 67 is the correct bulb, or where an accurate bulb chart for the 90 Trooper is?

 

If you are talking about the running light that is a #67 and the one mounted with the headlight is your turn signal and running light and that is a #1157. I believe you are talking about the one that is in a plastic yellow/orange housing by the edge of the fender.

Hope this helps