marker lights won't come on

My head lights, reverse and tail lights work but all the other lights won't
coime on. Is there a relay for that? I tried all the fuses and can't find
any problems anywhere. The turn signal work too so, I know that power is
getting to these lights. Any ideas?
Thanks

 

Silly question, but have you checked the bulbs?

 

First, what model and what year is the car?

When you say "tail lights", do you mean the brake lights or do you mean
the rear parking / marker lights?

If you meant brake lights, I t would seem that the problem could be the
light switch (different set of contacts for headlights and marker
lights).

 

Light switch as in "brake light switch" under the steering and above the brake
pedal. Probably out of adjustment or likely a blown 20A fuse, which typically
only supplies brake lights.

 

Sure, if his brake lights aren't working the switch at the pedal would
be a likely problem. However, the subject line is "marker lights won't
come on", and the poster says his tail lights *are* working. If by "tail
lights" he means "brake lights", then the brake lights are working and
the brake pedal switch is fine. In that case the most likely fault is
the light switch. It has one set of contacts for the front and rear
marker lights and all the dash lights and a separate set of contacts for
the head lights. It is not uncommon for the switch to develop a problem
with one set of contacts and not the other. Often a good cleaning of the
switch internals will fix the problem.