Chrysler Repair: 97 Town n Country; PTC #3 Clicking under dash, positive temperature coefficient, motor circuits

Question
I have a 1997 Chrysler Town n Country with 3.8 engine, power everything.  A couple days ago my wife started the engine, then turned it off to come back in the house for something when weird things started happening.  We started hearing a clicking sound near the fuses.  I removed the cover and sure enough clicking was coming from the #3 breaker, not fuse.  However, when the key was turned to the on position, the clicking stopped.  The clicking continues even when the key is not in the ignition.  REGARDLESS, the van won't start and no lights, or anything come on.  I checked the power distribution relay center and I think I traced it back to the low beam relay ( more clicking there).  I replaced the fuse, or breaker as I would call it under the dash (I call it a breaker because it is much bigger than a fuse), and still the clicking and no change in van.  Question, can I change the low beam relay, and do you think that is possibly the answer??  Any answers or suggestions would be helpful.   Thanks

Answer
Hi Wade,
I am not totally clear on "#3". I suspect you mean the positive temperature coefficient device #3 in a row of 10 sockets (only 5 are filled) just below the 4 big plugs. I'll respond with that assumption in mind. The PTC's are like circuit breakers that self-reset.
The circuit diagrams in my '98 manual show that breaker-like device is powering the three relays directly underneath it: door lock and unlock relays,and the left door unlock relay directly below them. I suspect that one of those relays or the door lock motor circuits one of them operates is shorted or drawing too much current in any case. So try removing those 3 relays, one at a time, to see which one is the problem. The PTC #3 gets its power from a 40 amp fuse in the power distribution center (#26) and it is probably not blowing because of its size and the alternating off-on of the PTC. But fuse 26 is involved with powering lots of other circuits so that the oscillating power draw from PTC #3 is screwing up among other things a circuit to the ignition switch. There are a number of other supply lines in parallel off the battery that could be affected by the PTC #3 cycling, so anything could go wrong until we get that to stop.
If that doesn't help, write me back. And if it does, write back and tell me which door lock relays/circuits seems to be the culprit. Or tell me I have it all wrong!
Roland