Why don't my side markers work?
 

Any thoughts on why the side markers on my '88 don't work?

While installing the H4 headlights, I noticed that both sides remain unlit. I find this odd since the manual shows the wired in parallel with the corner lights. The corner lights work I checked the bulbs, they're good.

Thoughts?

Did you check to see if you have current to the bulb?

What do you mean by side marker lights? Do you mean turn signals? Or running lights?

Check you fuse panel, you may have disconnected it when you installed your new H4's and city lights set up.