wow!! i had this same problem with my cabby, I even bought a replacement relay, and steering column Indicator switch lol.
It turns out that the blue/ Black wire was just not attached to the back of the hazard sw.
Thanks for you help. Also uppon further bently investegation i noticed that the bl/bk wire doesent go right to the hot buss, but actually goes in to the mess of the hazard switch.
Thanks again for the suggestions. have a good weekend everyone.