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BlueG Elite Veteran Date registered: Aug 2009 Location: DC Vehicle(s): 2003 G500 Posts: 714 | Flickering Lights Sometimes - Stable Voltage at 13.5-13.8 Recently I've noticed a strange and intermittent issue. When I am driving or idling, doesn't matter the RPM, my headlights and the screen in the middle of the speedometer flickers a hair. Its not a crazy amount of flicker. Just a gentle flicker. This doesn't happen every time the lights are on. Nor does it seem related to load on the electrical system. Battery is a new AGM. Alternator is original (replaced shortly after the G was purchased new under a warranty repair/update). When I switch to the voltage screen it is always 13.5-13.8 with the engine on, with it being higher when RPM's are higher. My thought is the voltage regulator is going out. I can remove the alternator and swap out the voltage regulator with a new Bosch unit but before I do that I wanted to see if it is anything else. Already checked that ground is clean and tight. Any suggestions? | ||
#238923 | |||
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Aircruiser Extreme Veteran Date registered: Aug 2011 Location: Atlanta GA Vehicle(s): 2000 G500, 1986 300GD, 2017 Porsche Cayenne Hybrid Posts: 364 | Re: Flickering Lights Sometimes - Stable Voltage at 13.5-13.8 It sounds like you are thinking correctly. Retrace your previous steps, re-chek your battery connections and grounds. | ||
#238924 - in reply to #238923 | |||
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NHDave Extreme Veteran Date registered: Dec 2013 Location: Seacoast NH. Vehicle(s): 2004 AMG Posts: 464 | Re: Flickering Lights Sometimes - Stable Voltage at 13.5-13.8 Agreed ^ Had the same experience..flickering dome light. It was the regulator | ||
#238927 - in reply to #238923 | |||
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BlueG Elite Veteran Date registered: Aug 2009 Location: DC Vehicle(s): 2003 G500 Posts: 714 | Re: Flickering Lights Sometimes - Stable Voltage at 13.5-13.8 Thanks all. I suspect the alternator body itself is good still. I will just pickup a regulator to install onto the alternator. | ||
#238929 - in reply to #238923 | |||
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NHDave Extreme Veteran Date registered: Dec 2013 Location: Seacoast NH. Vehicle(s): 2004 AMG Posts: 464 | Re: Flickering Lights Sometimes - Stable Voltage at 13.5-13.8 Yes..it should be good for two, maybe three regulator swaps..before the slip ring groves are warn too deeply. Cheers! Edited by NHDave 4/11/2018 6:31 PM | ||
#238936 - in reply to #238923 | |||
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BlueG Elite Veteran Date registered: Aug 2009 Location: DC Vehicle(s): 2003 G500 Posts: 714 | Re: Flickering Lights Sometimes - Stable Voltage at 13.5-13.8 Would you suggest pulling the alternator and swapping in the new regulator or can it be done on the engine? | ||
#238951 - in reply to #238923 | |||
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NHDave Extreme Veteran Date registered: Dec 2013 Location: Seacoast NH. Vehicle(s): 2004 AMG Posts: 464 | Re: Flickering Lights Sometimes - Stable Voltage at 13.5-13.8 It maybe possible to do it from below, but I couldn't..i can't remember why but removing mine with all the extra AMG BS in the way, I couldn't drop it below and barely got it passed the oil cooler lines. Unless I drained the coolant For you it maybe easier. Wish I knew more..Sorry Edited by NHDave 4/12/2018 8:25 PM | ||
#238953 - in reply to #238923 | |||
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BlueG Elite Veteran Date registered: Aug 2009 Location: DC Vehicle(s): 2003 G500 Posts: 714 | Re: Flickering Lights Sometimes - Stable Voltage at 13.5-13.8 Thanks - it doesn't look too tight in there. I think I should be able to pull it and do the repair on the bench instead of on the car. | ||
#238954 - in reply to #238923 | |||
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LucaB Member Date registered: Jul 2013 Location: Italy Vehicle(s): G 400 cdi Posts: 31 | Re: Flickering Lights Sometimes - Stable Voltage at 13.5-13.8 have the same on mine, alternator has been replaced less than a year ago, fresh new battery in. it only does it with cold car in winter. | ||
#239045 - in reply to #238923 | |||
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