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Hi Susan,
I find it flattering that my pictorials have been a help, and your description of the task as detailed as any I've ever read. Some things I'm learning: (1) someone actually wants $1100 to do that, (2) the fan clip continues to be a puzzle if not a lost item, (3) a replacement fan would need the holes enlarged, and (4) the lack of clarity to guide the placement of the wire bundles in relation to the various brackets, ducts, and obstacles they must clear.
So, I wonder, of the three pictorials, I assume you used the two-part write-up I did when doing my grandson's '90, and not the main page where I did my '84, or the heater core pictorial done with heater box removal on my daughter's '91. There's that word assume again.
Thing is, the AC is a big change 90 to 91, and one of those changes is concerned with your snowflake switch and the blue light. Things definitely look different under that console cover beginning '91, and I have no clue how much they changed in '92, when they started putting that plastic heater control valve in.
Try this on your AC. First be sure the windows go up and down. That's just to make sure your fuse 12 didn't blow along the way, as the blue light in the AC switch gets its power from there, as well as the AC itself. I'm just trying to save you from diving back into the console panel if a fuse could maybe fix it.
Assuming the fuse is not the problem, my next step would be to loosen the panel -- you know, the side screws and the two buried in the carpet nap -- and tug it back just enough so you can get a look at the switch back. The black wire to ground the blue lamp actually connects to the lamp holder, which must be inserted in the correct way, all the way, into the switch for its contact to deliver the lamp power. Most times the bulb falls apart from handling, so that might be all.
I'd put a test light to the green/red wire to be certain, with the key on KP-II, it gets power when the switch is on. If so, and the blue light still doesn't light, I'd fix the bulb or its ground before moving on to see why the AC doesn't get cold.
Assuming you've gotten the blue light to work now, and the AC still does not, the next place I'd take the test lamp is out under the hood at the low pressure switch on the accumulator just in front of the firewall. It should have two green wires there which should both have battery voltage on them after 10 seconds of having the key in KP-II and the snowflake switch lit up blue, even with the motor not running.
If only one does, suspect it needs a recharge. If none do, then look for a problem like the AC relay didn't get seated in its socket well, down by the right front leg of the console.
Please let me know which write-up you followed to do this heater fan job. Thanks,
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Art Benstein near Baltimore
A closed mouth gathers no foot.
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