airbag fault - permanent

Just finished fitting Kenlowe fan with extra override switch. Filled up with water and all seemed okay. Let engine cool, topped up water run engine to set fan and hey presto - airbag fault. Connected Hawkeye, 3 faults 2 cleared one Drivers airbag open circuit, permenant could not clear. Maybe caught a connector while working under the dash. Any suggestions on where to start looking? thanks in advance
Bill

Ive caught the connector under the rev counter before, that puts air bag light on, just pushed connector back into place switch ignition on light gone out.

Thanks kds, I will check that tomorrow. I reckon that could well be the problem. I found a loose plug, a bit like an internal computer connection white plug. I wonder if that might be it. Thanks again
Bill