97 mazda 626 all lights work except tail lights

Question: 97 Mazda 626 all lights work except tail lights fuse all good. is there a relay? i can power them direct from behind radio. i am installing a radio they cut out the harness radio is easy enough and is working but they lost tail lights in their little chopping adventure. any ideas? Answer: If you look at the wiring diagram , power comes from the Main Tail light fuse 15 amp, which you said is OK, so the only thing left is the TNS Relay or the light switch itself. Check for power at the light green wire from the switch at the relay, if you see power (with lights turned on) but do not see power on the orange wire, replace the relay. If you do not see power at the light green wire, replace the switch.