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View Poll Results: Do your lights dim?
Yes 6 31.58%
No 13 68.42%
Voters: 19. You may not vote on this poll

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Old 03-08-2007, 10:33 PM   #11
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The 87-91 System and the 92-99 systems are diffrent..

The 87-91 supplies the power to the Alt field via a 12v switched circuit..

On the 92-99'* the Power field is controled by the PCM... The PCM will change and or ramp up the power to the Alt depending on system load...

I have noticed a lot of the newer cars for exampl the 00+ bonneville will have 14+v all of the time... Other GM products are similar...

On my 95 depending on the load of the system I can see low points of 12v( 13 is the usuall ) and high points close to 14.5..

On the 91 Bonneville its 14v all of the time... Just different systems on different cars

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Old 03-08-2007, 10:39 PM   #12
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Mine dim whenever I touch the brakes, unless I'm driving with the brights on.
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Old 03-08-2007, 10:43 PM   #13
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Used to. Now I have a 140 amp and I upgraded several of the cables.
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Old 03-08-2007, 10:59 PM   #14
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Quote:
Originally Posted by J Wikoff
Used to. Now I have a 140 amp and I upgraded several of the cables.
Mine do..but I'm going to solve it by lightening the load on the electrical system instead of jacking up the alternator output. (Takes power to make power)

I've become rather fond of the LED arrays in place of lighbulbs, so I think I'll be replacing all the marker lamps, tail lamps, and turn signal lamps with LED bulbs. I'll keep the silverstar headlights, despite the increased draw.

The worst example of the load on the car is a long stoplight on a rainy night. With the wipers, headlights, markers, and brake lights all on at once, the voltage drops and things kinda slow down. As soon as the car starts moving again, everything returns to normal.
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Old 03-09-2007, 01:57 AM   #15
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like curt said, if it'* a stormy night and i have everything on but the kitchen sink it will dim at a stoplight, but in normal driving the lights are fine at idle.


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Old 03-09-2007, 03:52 AM   #16
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I would agree, I have a 97 and on rainy nights with the lights, wipers, maybe defrost the lights will dim at idle
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Old 03-09-2007, 09:22 AM   #17
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Quote:
The worst example of the load on the car is a long stoplight on a rainy night. With the wipers, headlights, markers, and brake lights all on at once, the voltage drops and things kinda slow down. As soon as the car starts moving again, everything returns to normal.
Along with having the defrost on, or A/C, your cooling fans draw some serious power.

I measured the power draw on mine once (engine off) and it pulls 24 amps.
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Old 03-09-2007, 09:27 AM   #18
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i have the 140 amp alternator, with the most extensive lighting/audio that your going to find on a Bonneville.......plus i added many SSE/SSEi features to the car... and i do not have any dimming at night, with the neons on, and the system playing

if you have dimming. you need to look into a solution
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Old 03-09-2007, 10:04 AM   #19
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95 SSEi, I believe had the 140 amp alternator and no it doesn't, unless I have many many options on like rear window defroster, fan on hight, headlights on etc.
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