Headlight issue

[chascoll]

I was wondering if anyone has experienced this; while driving at night, the headlights will dim slightly when the brakes are applied. Does the h3 have a voltage regulator or similar component? Not a real big deal, but one of those little things that bother you.

Happy thanksgiving

 

[Happy Hummer]

Totally normal.
Chris

 

[Best4x4]

It's 100% normal, but I will have to say after switching to a Group 34 Diehard Platinum 930AMP in my Alpha & a Group 34 Optima Red Top 1000AMP battery in my Adventure I don't notice it as much.

 

[chascoll]

thanks!

Totally normal.
Chris

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Appreciate it!

 

[chascoll]

It's 100% normal, but I will have to say after switching to a Group 34 Diehard Platinum 930AMP in my Alpha & a Group 34 Optima Red Top 1000AMP battery in my Adventure I don't notice it as much.

O

thank you I feel better

 

[whylee]

I have had that happen in a few vehicles. It seemed to be from a charging system running on the edge. After switching to a higher amp alternator the problem stopped. Im sure there are a few things that cause it, but for the most part it is normal.

 

[chascoll]

Makes sense.....thanks!

 

[alrock]

The issue in our H3 is fuel savings - the alternator is not always running but engages when there's a strong demand on the battery. Since we have electric brake boosters, applying the brakes puts a large strain on the battery and thus the alternator engages to maintain the supply. Thus, there's that moment when the the brakes are applied that the lights dim, but once the alternator engages the supply is boosted.

 

[High Five H2]

i always wondered why that happened.

 

[Best4x4]

My Rover's with electronic brakes did it too.