There is a short somewhere in the wiring.
the turn signal flasher may be the problem moast vehickles have one forturn &one for 4way
u may have a defective multifunction switch
The TNS relay in my '99 626 is blown, causing the dash lights, front & back parking lights, and taillights to not work. Turn signals and hazard lights still work. Quick test: The A/C relay is exactly the same part. You can swap relays to check the TNS relay. Be warned that swapping relays can result in more damage if a short caused the first one to blow. Doc
Check the fuses first then check the bulbs.
clogged iac valve
Could be the brake light switch or fuse.
There could be a couple of reasons why the headlights won't work when the other lights do. One reason could be a blown bulb. Another reason could be a problem in the wiring.
check your ground wire in the back
fuse relay wiring switch
Could be the bulbs or the fuses or the flashers or the signal switch assembly
Look into a recall on this. there is one about the lights. just google it The reason why the headlights are not coming on could be a control module for the headlights (like the 2003 Mazda 6 in the related link). The other reasons could be because of a blown fuse, a bad relay or the switch itself. Most likely will need to get access to a wiring diagram for the specific vehicle (exterior lights) and check power and ground, starting with the switch and work your way to the headlights and see where the open circuit is.
Check the rear light wires, could be a short