It is worth $16 for a new lamp board to attempt the fix - Saab 9-5 Bulletin Board - Saabnet.com
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I read the WIS Sequence of Operations for the Rear Parking Lights. The right lamp gets power from pin 68 of the TWICE. The Twice monitors the resistance of the lamp circuit and issues the alarm message that is displayed on the SID stating Lamp Failure.
So, does the TWICE turn OFF pin 68 at the same time it generates the lamp failure message if it senses a failed lamp? The Sequence of Operations does not say so, but with a separate power pin for each lamp is would certainly be possible. All issues have been with the right rear lamp assembly and all lamps are located on that one $16 board.
$16 is relatively cheap compared to shop labor. I just paid 1/2 hour of labor to have a coolant temp sensor re-tightened on my wife's 9-3SC that I had replaced. And I KNOW that sensor was tight when I installed it as I really wanted another 1/2 turn of that sensor to make the electrical connection easier - but it was so tight that I didn't want to muscle the steel bodied sensor into the aluminum head any further for fear of disastrous consequences.
2008 9-5 Aero Sedan, sold at 227K miles
2006 9-3SC 2.0T - Wife's daily driver
2000 Viggen Convertible - Summer Fun Car
1964 Quantum IV Formula Car - Retirement project
2000 9-5lpt Sedan, sold at 318K miles
Posts in this Thread:
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- How sophisticated is SAAB's lamp sensing system?, MI-Roger , Sun, 31 May 2020 07:24:04
- Fuse #4 in dash board fuse block?, MI-Roger , Wed, 24 Jun 2020 11:52:18
- taking a tangent..., AeroEd , Wed, 10 Jun 2020 14:24:36
- Re: How sophisticated is SAAB's lamp sensing system?, SWEDECAR , Mon, 1 Jun 2020 08:01:15
- More diagnostic results. Opinions solicited....., MI-Roger , Sun, 31 May 2020 08:21:57
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