Question about 1989 Cadillac Fleetwood

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1989 cadillac fleetwood digital dash flashes

The digital dash just started flashing, and the climate control display and fuel display will both go blank and say c then change to d then it will all flash and start working normally, and there a clicking noise coming from under the glove box when everything flashes. can anyone help.

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  • nadnick Apr 05, 2009

    thanks im a try and see if i can find one it seems like that is what might be causing it we ripped out the dash and found all the relays and see that there clickin over but it seems like that clickin to.

  • stevedi1111 Apr 11, 2009

    1989 cadillac fleetwood dash flashes and makes a clicking noise



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You have an ECM and a BCM, one located behind your glove box and the other underneath your passenger side dash. They are very similar in size, shape, and color but i think the ECM s behind the glove box. I had the same problem and replaced the one behind the glove box and the problem went away. They are both easy to replace but they cost around $70 if I remember correctly. And you have a chip you have to swap from the old to the new that you have to be careful with.

Posted on Mar 03, 2009


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Cadillac deville 89 fuel data center and climate control arent working.

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

For these issues... (I doubt they are related)
would be the best approach...

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

On eBay (refurbished (1 year warranty)

Rockauto (out of stock (I rest my case)),1989,deville,4.5l+273cid+v8,1025693,fuel+&+air,fuel+display+control+module,10492

Extra information

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


ENTIRE control panels are available on eBay(some good... some NOT-SO-MUCH (but you are protected (sorta)).

Dress warm... happy hunting
On the HVAC if the controls seem to be working... another
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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

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Fuse 1 radio
fuse 2 wiper
fuse 3 gage
fuse 4 turn/back up
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fuse 6 defog
fuse 7 airconditioning fuel data center climate control panel cluster defog relay
fuse 8 elct. level control ignition
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fuse 20 spare
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Check with a Chilton Repair manual just to verify it yourself.

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