Seatbelt and infl res light

[mlipmd]

In my '90 ZR-1 - Months ago when I got my car I had these lights on and I have checked the codes and both 16 and 26 showed up so I cleaned the sensor/frame contacts on both sides, painted them again for insulation, and then cleared both codes and it lasted for a few months. Then the lights came on again, this time only with code 26 - driver's side impact sensor electrical contact fault. So I cleaned and sanded it again, got the code to clear, and in a week it came back. This time the code won't clear for more than a few min, then it returns. I have read that this may also be due to bad/dirty contacts in the yellow connector for the air bag, located in the left side of the driver's footwell. I know where it is and have seen it, but, my question is, how sensitive is this to being taken apart and put back together, should the battery be disconnected when you do this, is there anything special in doing this to avoid the airbag from being set off? I really don't want a disaster inside my car in an effort to clear the warning lights and code. I know having it is harmless, just annoying because it's not right. Thanks.