1999 Kia Sephia Any ideas on why both tail brake lights do not work although all other lights work including third brake light Bulbs are fine and 30 Amp fuse ok?
If your dashboard lights are also not working, try to switch the 30 amp relay with the air condition 30 amp relay, they are the same type of relay. Plug that in, make sure it is the correct direction. Then try your tail lights. If that doesn't work, use a volt/amp ready on the relay slots themselves to see if you get power to that slot.