Steve Ferraz Posted September 25, 2014 Report Share Posted September 25, 2014 Last night, my Caddy's instrument panel went blank with the expection of the PRNDL and the side panels when I put the car in park at work. I turned off the engine (it may have turned off the same time as the panel went dark) and restarted the engine and the panel went back to normal. This morning, when I got home, I stopped at my home and put the car in park when I needed to get out and open the gate. The panel went out again (with the same exceptions) but this time I knew the engine also stopped running. I was able to restart the car and everything went back to normal. I have a feeling this will happen again when I go to work tonight. Any clues as to why this happens? Thanks. Link to comment Share on other sites More sharing options...
winterset Posted September 26, 2014 Report Share Posted September 26, 2014 Could it bad a bad photo sensor on the dashboard, or something (like a magazine or map) laying on the front dashboard blocking the photo sensor? Or Turn your dash brightness all the way up to full brightness, and monitor it for a few days. Link to comment Share on other sites More sharing options...
Steve Ferraz Posted September 26, 2014 Author Report Share Posted September 26, 2014 I don't keep anything on the dashboard, I keep free and clear. Also, I always have the brightness at max. Besides, the sensor should not shut the engine off when I put it in park. The next time this happens, I'll take a pic ofthe dash to show what went dark and what stayed lit. Link to comment Share on other sites More sharing options...
rockfangd Posted September 26, 2014 Report Share Posted September 26, 2014 check your battery terminals. If the battery terminals are good and it still occurs you may have a bad ground somewhere or a bad ignition. GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
Steve Ferraz Posted September 27, 2014 Author Report Share Posted September 27, 2014 It happened again this morning, I put the car in park and the IP went dark. (I made an error in my opening post. Only the PRNDL stayed lit, nothing else.) and the engine died. I doubt it is the ignition but I'm thinking bad ground. Or at least something electrical. I've had issues with the electrical system before. Last year, the car kept losing power when not in use and found out later that a couple of relays blew and ended up having them replaced. Then earlier this year, the DRL malfunctioned and stayed on even with the car turned off and the key removed. As a stopgap measure I simply removed the fuse. Now this. Oh yeah, the only thing I had turned on when the glitch happened each time I put the car in park were the headlights and heater. But when I some shopping not to long ago, I didn't need to use the headlights nor the heater, and the glitch did not happen. Does this help? Link to comment Share on other sites More sharing options...
Texas Jim Posted September 28, 2014 Report Share Posted September 28, 2014 Pull the codes... write them down and post them here. The codes should point to what the issue is. Link to comment Share on other sites More sharing options...
Steve Ferraz Posted September 28, 2014 Author Report Share Posted September 28, 2014 Would the codes only show if the engine light goes on? The engine light on mine did not go on. I have my own scanner, so I'll check to see if there's any codes just in case. Link to comment Share on other sites More sharing options...
Texas Jim Posted September 28, 2014 Report Share Posted September 28, 2014 Would the codes only show if the engine light goes on? The engine light on mine did not go on. I have my own scanner, so I'll check to see if there's any codes just in case. Use the buttons on the dash to pull the codes.... the car will show a lot more than most scanners can pick up. Link to comment Share on other sites More sharing options...
Steve Ferraz Posted September 28, 2014 Author Report Share Posted September 28, 2014 How does that work? Link to comment Share on other sites More sharing options...
Göran W Posted September 28, 2014 Report Share Posted September 28, 2014 Have paper and pen ready! Turn ign to ON. (No need to start) Press "off" and "warmer" simultaneously until the dash lights up. Note the codes as they light up in the display. Also write down if the codes are "Current" or "History". Link to comment Share on other sites More sharing options...
Steve Ferraz Posted September 29, 2014 Author Report Share Posted September 29, 2014 No current codes. Codes listed in History: B2470 B2477 U1000 U1255 P1599 P0172 Link to comment Share on other sites More sharing options...
Texas Jim Posted September 29, 2014 Report Share Posted September 29, 2014 B2470... OnStar Antenna not connected B2477...Reverse Lamp Relay Shorted to Ground U1000...Network communication error... possibly related to OnStar antenna U1255...Network communication error P1599...Engine Stall Or Near Stall Detected P0172...System Too Rich Bank 1 Link to comment Share on other sites More sharing options...
Cadillac Jim Posted October 5, 2014 Report Share Posted October 5, 2014 It's beginning to look like the dash brightness problem is a Twilight Sentinel thing. The codes show things that need to be addressed, though. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
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