Intermittent headlamp dimming - Saab 900 Bulletin Board - Saabnet.com
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Intermittent headlamp dimming
Posted by calvin [Email] (more from calvin) on Thu, 15 Dec 2022 08:25:08
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Okay this is a bit of a stumper for me, I haven't seen it before, and I can't seem to track down the issue.
1. Every so often my headlights will dim down somewhat.
2. Then they'll get a little brighter.
3. this happens at a random intermittent times, not based on RPM or speed.
4. the voltage on my dash meter doesn't appear to change in correlation. if it does it's not enough to be noticable (it's not dropping from like 13.9 to 12v or something).
5. I don't have an ABS pump, my radiator, those types of things aren't kicking over to cause a big draw.
So I feel like, it's not something else drawing off the alternator, it's not a lose ground. it's not based on speed, my voltage isn't dropping. My battery seems fine (cranks over great).
Any ideas?
Calvin
posted by 131.106.22...
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