Diagnotic box Faulty?

[Drakh]

Hey all- long time no posting from me

But here I am again with more trouble. I have been using the diagnostic box and getting fault codes- told me I had faulty O2 sensor on the headers. Swapped with some other second hand ones and go to test it again and I get zilch. no lights flashing no nothing! been broken for a while now and its not going 2 fix itself. Also my interior lights don't work at all unless its set to door with the door open. I think the 2 could be related because they both went kaput at either at the same time or atleast in the same day.
7ONYD do I remember correctly u stating that you diagnotic box wasn't working either?? I could b wrong
Oh yeah- so u all know I have a klze 94 ba lantis

any pearls of wisdom much appreciated. cheers