My 95 saab dash lights are having the intermittent problem where they work on startup and during the day, but not at night. I have heard I should replace the potentiometer, but what if that doesn't work? I hear that there is a light sensor for the "black panel" feature which might be causing this problem in low-light situtations. I tried a potentiomar (rheostat) from the 93 model and nothing worked.
Also, I have noticed that the HID still works, when the dash lights don't, but falters under heavy accelleration. Any thoughts what this is?
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Failing crank position sensor (CPS) is possible. If the ECU does not get a constant pulse from the CPS the fuel pump does not switch on, so no start due to no gas. if it is failing, the pump may activate intermittently.
Try to tightin up the light bulb. be aware the only way to do this is to remove the hole dash. if you do not know how to do this i would recamend you take it to a shop are ask me to go through step by step directions.
Most likely the brake light switch at the top of the brake pedal has failed
Your HAZARD / Tail fuse has blown.
Underneath the dash at the top of the brake pedal locate the brake light switch. Remove the connector / wires on the back of the switch and then jumper across the 2 pins to make the brake lights come on. Start the car with the brake on and try shifting the car out of park.
you could go to a wrecker and have a look at a dash already removed from a vehicle or call a dealer and try and find out. otherwise just remove the dash and have a look
i would steer clear of leds, ive never seen any where the light emitted looked good. if you replace one bulb with leds you've go to do them all. but it just doesnt look any good on older cars in my opinion
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