You have to have a little more info to debug his problem. All cars have different harnesses that extend to the different circuits in the car (dash, rear wiper, power windows, etc). When you say there is no blinkers, hazard, etc, are you blinking externally (car signal in front/rear of bumpers works, etc). If not, then you're problem is bigger than expected. If they blink outside, then your instrument panel harness, harness connectors, relays, etc, is suspect.
Have you disconnected any harnesses lately?