Unstable Voltage When Engine Running - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
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#1 (permalink) Old 12-06-2004, 03:32 PM
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Hi everyone. My 318is has a voltage regulating problem. It seems to drop and spike voltage when the engine is turned on. All Electrical items in car... radio, dash lights, head lights, interior light go from dim to bright about a hundred times per minute. I have tightened my alternator belt and secured my batter terminals. It does not matter if the radio or fan are turned on/off.

Any ideas? Thank you in advance for your assistance with this issue.

used

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#2 (permalink) Old 12-07-2004, 04:54 AM
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It probably could be the regulation unit on the alternator. Maybe one of our electro technical members can tell how to do this.

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#3 (permalink) Old 12-07-2004, 11:24 AM
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Originally posted by dutchbmw@Dec 7 2004, 02:54 AM
It probably could be the regulation unit on the alternator. Maybe one of our electro technical members can tell how to do this.
[snapback]245056[/snapback]
Thanks for the input... two more things.

1)

The voltage alternates up and down during normal operation... doesn't matter if I'm sitting IDLE at a stop sign or going 80 mph on the Hwy. It's kind of embarrassing when sitting at a red light at night with your headlights brightness constantly dropping.

2)

There are some days... 2 out of 7... that the problem seems to go away. Wierd!!!


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#4 (permalink) Old 12-07-2004, 12:28 PM
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all the lights and gauges are out on my dash. maybe same problem. trying to find out what right now? any help appreciated!!
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#5 (permalink) Old 12-07-2004, 03:51 PM
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Voltage regulator. Go to a shop that fixes them or get a whole new unit.

Davey Jones: Check your fuses, if you really feel like it, you can unscrew the gauge pod and pull it out enough to check the connectors. They are very hard to just shake out, they have a stiff latch mechanism but hey, stuff happens.


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#6 (permalink) Old 12-07-2004, 05:22 PM
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Originally posted by bitcore@Dec 7 2004, 01:51 PM
Voltage regulator. Go to a shop that fixes them or get a whole new unit.

Davey Jones: Check your fuses, if you really feel like it, you can unscrew the gauge pod and pull it out enough to check the connectors. They are very hard to just shake out, they have a stiff latch mechanism but hey, stuff happens.
[snapback]245355[/snapback]
Thanks for the info... "Voltage Regulator" - I know what it looks like thanks to ONLINE BMW Parts... but my chilton manual fails to mention where it is located to replace! Anyone out there have a clue?

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