I just bought a 1991 accord for the lady to drive around but I want to fix all the bugs out of it. I notice driving it on the way home that the break lamp sensor light would come on (even though every break light worked) and then I would notice all the door sensor lights flash on and off. Not sure if it was every time I hit a bump this would happen or what.

But, stopped to get gas, turn the car on, no more sensor lights are visible. Strange, but what should I look for?

 

Look for dirty / loose / corroded sockets for the bulbs in the back. That warning light means the wattage doesn't match. It's also possible that one bulb is getting ready to burn out so it's flickering or not operating at the correct wattage.

Also look for the ground wires from the lamp sockets. Clean & tight where they're bolted to the steel??