Gauges half of the time they work and halfm the time they don

If your fuel gauge is showing you in accurate readings this is normal to all vehicles that are not used to fill-up gas full regularly but sometimes the cause of the inacuracy is due to faulty float valve in the gas tank you need to replace it

Try actually replacing the instrument panel fuse. Sometimes the open link is very small and hard to see. If this doesn't work try and find the instrument cluster connector and make sure that it is tight. Sometimes over time, if it wasn't latched all the way, it can work loose especially if there have been some wide temperature fluctuations where you are.

If the trouble with the gauge started after you worked on it then you likely damaged or created a restriction to the movement of the sending unit. You will have to remove the tank and double-check your work.

fans came late on those car,like 212 and second fan comes on at 224,you reprogram it to come a lot sooner,,other thing is there might be gunk inside the block,and coolant has hard time to pass through,and staying longer than enough in block temp goes high,even tough the radiator is doing it's job,it is just coming out block lot hotter than it suppose to be,and gauge read the block not the radiator

Dash board or gages

Try finding where the Earth cable on vehicle is connected and clean [until you are sure all dirt is removed} on cable and to were it is connected to. It seems obvious that this is caused by a bad circuit connection, else only the odd one would not work. Also look at fuse for that circuit in case over time the brass end as gone greyish, either clean {but it may later oxides over again], or replace the fuse.

Here is some info on the security light, plus some good "Do it Yourself " solutions to the problem.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

check the fuse its probably getting faulty

someone has cut the dash off you need to go to the information center and press menu it will give the options to cut it on or off

I have this problem too and my new Saab mechanic told me that I would probably need a new instrument cluster. He said a brand new one costs $2500 but that he would order me a used one from a car that had fewer miles than mine as you can set them back but not forward. He both diagnosed and temporarily "fixed" the problem by slamming his hand really hard on the dash over the panel and all the lights and gauges immediately started working fine....for now. I haven't had the work done yet (I have a 1998 Saab 900S with 130K) so if anyone has any other ideas about this I would love to know what they are. This issue with the gauges and dash lights has been happening on and off for over a YEAR and this is the first time someone has had any idea what it is. I already had my ignition switched replaced so we know that's not what it was. THANKS