Well, I'm not a Tracker owner, so please take this with a grain of salt. If the reverse lights come on at all, I'd say that the switch if OK. It sounds like it needs to be adjusted or repostioned. My best suggestion is to run down to your local parts store and pick up a Chilton or Haynes manual. The books can give you a more definitive answer and pictures! FriPilot
Bad bulbs can be the cause of your reverse lights not working on your 1999 Toyota Tacoma. A problem with the reverse switch or bad wires can also be the cause of your reverse lights not working.
Reverse light switch bad or out of adjustment.
Did you check the light bulbs? If OK, probably a bad reverse light switch in tranny.
There is a switch on the shifter or trans that turns on the lights when the vehicle is placed in reverse, it is out of adjustment or faulty. And don't forget the bulbs or fuses as a cause.
Check the fuses first. If the fuses are ok check the reverse switch. The switch is under the dash on some models, and on the transmission on others. A bad or misaligned switch is the most likely cause for no back up lights.
try the neutral safety switch
no
You probably need to replace your brake light switch. It's near the top of the brake assembly, beyond a trim panel. The fact that all three brake lights don't work rules out problems in the multifunction switch (the cause of similar problems affecting only the two rear lights.)
Repair or replace your reverse, neutral safety switch.
head lights won't work, no power to them, signal works , reverse lights work
fuse, bulbs
brake light switch would be most common cause