the plot thickens on the disapearing dash display
 

Hello All,
Well, there is a new turn of events on my disapearing display on my 92 ElDo. Tonight when I started the car to leave for work, I had the "no digital display,no speedo, no fuel gage, no radio" symdrom. It was all there when I shut the car down this a.m. The big change was that this time, I did have a working tach!!!The 42 mile ride into work brought no change in getting the display back. As I turned off the ignition at work, guess what........I had the radio display come on! Turning the key back to the on position I had the full display, with fuel gage. It there anyone here that has experienced a problem like this? I'm beginning to think in the direction of the modual for these displays and analog gages.

Blakoak

RE: the plot thickens on the disapearing dash display
 

I believe up to 92 Cadillac still used the CPS (central power supply) module in the Eldo to illuminate the gauges. If so, Replace the CPS if the wiring connector to it proves to be good.

RE: the plot thickens on the disapearing dash display
 

You may find the thread on e-ghosts valuable.
Its in our FAQ section.

RE: the plot thickens on the disapearing dash display
 

Thanks Carnut and Stealth,
I just got a full wiring diagram and will be trying to track this inconvienience down. Not that it makes any difference, but when I pulled the codes on the dash (when it had display) at the end of the trouble codes I got the code............ECM?. Any ideas what this pertains to?
Thanks,
Blakoak

RE: the plot thickens on the disapearing dash display
 

is my monitor doing tricks on me?
I am used to seeing a number for the code and i dont see one there.

RE: the plot thickens on the disapearing dash display
 

Your monitor is fine, Stealth. I was finally able to get the display to come back on and pulled the codes again. There were 9 in history (e047,e052,e091,i052,a037,a046,r026,r033,and r061) and one in current (i039). After the display flashed all the codes, it displays "ECM?". Tonight, the display lasted about four miles and went out for the remainder of my 42 mile trip into work. This afternoon I removed and cleaned the ground on the drivers kick panel, which was clean and shiny, and checked the connector under the dash, which was clean and tight.

Blakoak

RE: the plot thickens on the disapearing dash display
 

if you tap it anything comes on ?

at this point, the cluster unit is certainly a suspect.


.

RE: the plot thickens on the disapearing dash display
 

no change with tapping, thumping,slapping, or banging.........swearing at it doesnt seem to work either!!

RE: the plot thickens on the disapearing dash display
 

ECM? only means that its asking you if you want to display ECM parameters. If you hit hi fan you are saying yes. If you hit low fan you are saying no.

RE: the plot thickens on the disapearing dash display
 

Thanks carnut. Well, this weekend I'm going to do a full inspection of the wiring harness and connectors. Hopefully, something will turn up there to correct this problem.

RE: the plot thickens on the disapearing dash display
 

Hello All,
Well, sat morning I went about checking evry ground and connector I could find and get to. All looks nice and clean and tight, I really was hoping I could get at the one that plugs into the back of the instrument panel, but there was no way I could squeeze my hand up in there.
Anyway, had to take a ride sat afternoon to deliver a commission work I had completed and on starting the Eldo, I had full display. The trip was roughly 75 miles each way, and the display was there just about the whole trip, including a couple stops where the car was turned off. It went out about two miles from home. Sunday morning I went out and just turned the key to "on" and the display was there. I checked the codes and they read the same as the last time with the "I039 being the only current one. I thought I would try clearing them all and starting over but couldnt get to the "clear codes" display. I went back to the beginning six times to try to get it to come up, according to the directions I found here on the forum and the closest I got was the "ECM?"
Then, I lost the display again. As on Sunday night when I left for work at 9:30, there was still no display.
When I got to work and went to turn the car off, I thought I noticed the fuel gage jump as I was turning the key. I turned it back to "on" very slowly, and for just a split second it seemed to want to work. I'll see if I can get to the connector for the ig switch tomorrow, perhaps there is something there.
Blackoak

RE: the plot thickens on the disapearing dash display
 

Hello All,
Well, I checked out the connector for the ign. switch and all looked good there. I did notice a couple new developments though. When I lose the display, usually, the fuel gage will drop to just above empty, the speedo will bounce between 5-7 mph , and the tach will read 500-850 rpm. Tonight on the way into work, I lost the display after about 8 mi. but this time I still had a functioning tach and the fuel gage was pegged below empty, and the speedo was as low as it could get. I had read in one of the threads here about a guy that was having all kinds of display problems and eventually ended up replacing one of the boards inside the cluster, and that corrected the problem. That was on a newer (96 I think) deville. Does anyone here know if my 92 Eldo has that same setup. I dont find anything on the wiring diagram refering to solid state boards inside the inst. cluster. This problem is similar to problems we would get on generators I repaired when I was in the service. One component would get warm on one of the printed circut boards and quit conducting. Once cooled down, it would funtion normally. Any suggestions?
Blakoak

RE: the plot thickens on the disapearing dash display
 

Stomper-
Tonight on the way into work, I lost the display, as usual, so Igave it a good rap on the right side, and, viola! the display came back on! does this sound like maybe the connector on the top of the cluster may need some attention? or more like a bad cluster?(I have purchased a used, known to be good cluster, in the event I need to change this one out)

RE: the plot thickens on the disapearing dash display
 

is there a RIM on that car??? rear integration module....... if so see if you can find another and exchange to see if thats the problem. just a thought
rickyd