Bay door locks

Executive wrote:
However, it does not show the 'switch' on the engine hatch. That switch has been broken for years and appears to be one of the plunger style switches. I just wired that switch together and it's worked fine until now.

Here is a thought, from the above statement it sounds like the "switch's" are a "daisy" chained grounding system if one is not making contact the entire system shows open ground.

One idea: Wire the switch's together on the non working locks one at a time to see if one of them is bad. If need be wire all the switches together, that should eliminate the switches as a problem.

Second Idea: Run long jumper wires from one of the locks on the working side to the non working side to see what happens. Jump each lock to see if one actually sends power to the rest. This will verify if any locks are working and identify the first one in line that supplies power to the rest, if that is how they are wired.

Third Idea: Use a contact cleaner like CAIG Deoxit on all the lock system contacts, switches, boards, connections, everything, corrosion is our enemy.

Just a few blind thoughts :h