This was posted in a previous answer to a similar question. I am not an expert, but I own a piece-of-$hit '96 Grand Cherokee Laredo and I have had to deal with the annoying beep and flashing warning for over a year now. Here is what this guy had to say:
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The VIC (vehicle information center) has some issues with the solder connections between the display board, and the CPU board. They have a flexible connector between the boards, that is "wave soldered" at the factory. Due to some quality issues, units from 1996-1998 have some connections that didn't receive the full amount of solder required for reliable connection. Pin 14, which connects to a pink wire on the electrical harness is the culprit. Once that connection is secured, the false "Coolant Sensor Failure" will go away.
That sounds very technical, but if you have even the most rudimentary soldering skills, you can fix it with a 30 minute investment of time, for free. Google "removing the VIC" for more detailed information about what panels must come off to get the unit out- it's a bit involved, as it requires removal of the dash storage compartment door. I won't cover that here...
Once the unit is out, unscrew the 6 Torx screws holding the unit together. Once the screws are out, the unit can be split in half like a clamshell. In between the two circuit boards are a ribbon cable, with fairly stiff wires in it. The problem lies in the solder connections of the riibbon cable, to the boards. Under a magnifying glass, you may be able to see one or more "cold solder" joint connections. These look like a little silver mountain, but some may be missing some solder, or be a very dull color- not the bright shiney connection of it's neighbors.
I chose to heat all of the connections one at a time, and add a tiny bit more solder to each. Once putting the unit back together, and re-installing, I haven't had any further issues.
The only other alternative is to either ignore the message center, or purchase a VIC from some place like E-Bay, or a junkyard.
I also have a 1994 Jeep Grand Cherokee that displays "Service 4-Wheel Drive Switch". The switch is on top of the transfer case on the driver's side. My mechanic had never heard of this before so I decided to do some research about it. In my findings, I have noticed that several people have had this switch replaced, only with the message to display again after a few miles. It seems that the display is more at fault than the actual switch, so talk with your mechanic before you have any work done.
fix it
I have a 2002 alero how do you reset, the coolant light is always on. Thanks, Alero owner
A display driver is required for the system itself to display anything, so essentially no, there isn't.
Junkyard. ebay
You would not drive it at night or when the law says you must display headlights.
That message means it is time for an oil change.
Unless you have the triple information display on your vectra there is no warning light indicating low coolant apart from the engine temperature gauge.
there are many components that will display the check engine light if they are faulty. Go to a local mechanic and have them scan the computer. They will display the component that is faulty.
On the display of the car's computer Opel Vectra B , produced on 1997, very often present note: Coolant level. We will appreciate your replayabout what does it means.Thank you,Regards
Inside the engine compartment it should be a 20 amp (yellow) mini
your coolant level could be low