1993 cadillac , letter c on fuel data center and climate control

It is a known issue

92 Deville climate control not coming on ' Cadillac Owners ...

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Jan. 10, 2013 - Hello, I have a 92 cadillac deville 4.9L In general it runs fine but recently we ran into a problem. The problem is the climate control panel ... 1992 Deville Heater/Climate Control Issues ' Cadillac Owners ...
Oct. 5, 2009
92 Deville fuel center and climate control not working ...
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1992 Deville BCM ' Cadillac Owners Forum
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Hello Belinda Reid,

Nice car...
(sorry... I'm sure you are not in the mood right now)...

There are CADILLAC Clubs across this country
(lovers, admirers, professionals & amateurs)...

I recommend for future issues you seriously consider
looking into joining... The wealth of information is
really quite EXCELLENT... or buying your own set of
FACTORY WORKSHOP REPAIR MANUALS.

For these issues... (I doubt they are related)
Starting with a GREAT CIRCUIT DIAGRAM
would be the best approach...

I PREFER PROFESSIONAL GRADE FACTORY
repair manuals ... but FREE circuit drawings & your 22 TECHNICAL Service Bulletins (TSBs) can be found
on BBB Industries website
(registration is required... these are real documents)
BBB Industries Premium Alternators Starters Power Steering Products

In the 1989 Deville (an issue shared issue w/Eldorado) ...
I did find a TSB on "BLANK DISPLAY" ... Ironically the
TSB page was also blank (GM humor ..
(I presume)).

The FUEL GAGE seems to be a popular part...
(typically means "unreliable: great point to START").

On eBay (refurbished (1 year warranty)
OEM 1985 1993 CADILLAC DEVILLE FLEETWOOD FUEL DATA CONTROL DISPLAY 1YR...

Rockauto (out of stock (I rest my case))
http://www.rockauto.com/en/catalog/cadillac,1989,deville,4.5l+273cid+v8,1025693,fuel+&+air,fuel+display+control+module,10492

Extra information
More Information for BLUE STREAK ELECTRONICS FDC1

Also see HVAC Controls, Motors & relays
(another OUT of STOCK: popular part)...
http://www.rockauto.com/en/catalog/cadillac,1989,deville,4.5l+273cid+v8,1025693,heat+&+air+conditioning,programmer,19408

Info
More Information for BLUE STREAK ELECTRONICS PRG2

ENTIRE control panels are available on eBay(some good... some NOT-SO-MUCH (but you are protected (sorta)).
85 92 CADILLAC DEVILLE ELECTRONIC CLIMATE HEATER AC CONTROL SWITCH eBay

Dress warm... happy hunting
On the HVAC if the controls seem to be working... another
popular part are in the ACTUATOR DOOR sections of your parts catalogs...

Look through the eBay parts for ideas...
0results for cadillac 1989 deville hvac vac control
AND don't overlook the CONTROL RELAYS that ABOUND in
your vehicle... Buy a few spares BEFORE they become rare.

Hope this helps.

Carnac the Magnificent

Electronic climate control power module . Don't know what relay you replaced because this vehicle has no blower motor relay . 1990 Cadillac DeVille Power Module

not blowing air or when switch is on blows cold air when you have climate control knob turned over to heat? it could be a switch or blower motor or fuse if its not blowing any air. if its blows cold air when knob is on heat then is can be thermostat or low on coolant or it could be climate control module or it could be a air filter in dash.

Fuses 6-7-8-9 are powered from the ignition key switch.
Fuse 4 is powered from the RAP relay number 2 in the relay box.
RAP is for retained accessory power - its the relay that keeps power going to the radio and things after you turn the key off and before you open the door.

Have you tried smacking the blower motor? If it starts running after you hit it, replace it.

CHECK UR BLOWER MOTOR WITH A METER MAY BE FINALLY TOOK A DUMP

check your fuses it might just need a new 20 amp fuse which is a little "U" shaped yellow thing

This is defenetly the BCM, I had a 1990 with all of the same problems. Buy a rebuilt and install it behind the clove box. Remember that you must install you memory prom into the new unit as they don't come with any in them (it is what is memorizing your miles driven.) You will get off pretty easy on this one as they are available and not too expensive.

There's a blower motor (fan) under the hood and up against the firewall near the center of the car that takes some work to remove. It has gone out in the last 2 of my 4 Cadillacs. Turns out if you're not real careful with the positioning of the spark plug wires they will brush up against it, and if one of them gets cracked or brittle it will "arc" and short out the blower motor. The a/c compressor should still come on (you'll hear a click when it engages) but you won't get any air blowing into the cabin, hot or cold.

The part was like $200 stock (year 2000 prices) and it took about an hour to remove it. My Caddy at that time had this damn strut bar going across the engine bay which we eventually removed to get to the blower motor.