Chrysler Repair: electrical problem 1991 new yorker 5th ave, amp circuit breaker, amp fuses

Question
I have a 1991 chrysler new yorker 5th avenue. The power windows, rear and mirror defrosters, and climate control have suddenly quit working. The air bag light and brake warning lights have come on as well. I realise I am trying the easy way first by asking, but I don't have a lot of spare time to do much troubleshooting myself. I checked the obvious things, charging system, fuses, fusable links, main harness connectors, but haven't torn into any panels yet. I suspect a computer malfunction, but the obd codes only came up with a recent computer or battery disconnect and a short or open in the blower curcuit.

any ideas?
thanx,
Dave

Answer
P.S. I made a mistake in my first response and misidentified the fuse. It should be a 50 amp fuse lablled blower motor that is the one I believe is blown. Everything else is as before. Below is the correct response.


Hi Dave,
It appears to me that you should take a look at the power distribution center under the hood where you will find a 50 amp fuse that might be lablelled "blower motor". That fuse feeds a section of the ignition switch which in the run position provides power to the 30 amp circuit breaker in the relay block above the fuse box in the cabin that supplies the power windows, and 10 amp fuses 9; 10; 11; which spply power to: the rear window defogger, ATC control system, air bag module, cornering lamp switch, automatic day/night mirror; air conditioning blower motor; back-up lamps, a.c. cycling switch, respectively. That touches on most of the systems you say quit working. That single fuse would, if blown, take all those out. But that may not solve the problem as you know because it may simply being overloaded by one of those 4 fuses/breakers so you might not want to just put in a new 40 amp fuse but instead remove the 3 smaller fuses and the circuit breaker and put them back in one at a time to see if one prompts the 40 amp fuse to blow. Or you could check the resistance to ground that each of the 4 looks at with a digital ommeter to see if one of the four is shorted to ground rather than reading 1 ohm or so to ground.
I'm curious to know if I have this correct or not. So if you would let me know I would appreciate that.
Roland