voltage drop????

[MTX520 10+ year member]

i have problems on voltage drops when i turn on heater....is this normal???...i recently have 1 1000 watt crunch amp with a 4500...not really enough power to have voltage drops....should i get 1 extra battery for the rear?

Click to read more...

 

[MTX520 10+ year member]

i have a trailblazer 02

 

[microhaxo 10+ year member]

Normal, most stock car electrical is poorly grounded.. When i roll down my windows my lights dim.

 

[MTX520 10+ year member]

my lights dont dim...at all..not even when i roll down the windows...but i guess bro...thanks!

 

[microhaxo 10+ year member]

Well also the heater draws some decent amperage..

 

[ARSkemp 10+ year member]

Normal, most stock car electrical is poorly grounded.. When i roll down my windows my lights dim.

I always wondered why that happens. Hell, my voltage drops more from my rolling all my windows down @ the same time then from playing my stereo full tilt (system in sig).

 

[MTX520 10+ year member]

haha...when i play my stereo full tilt..(even thoug my sub is only 220 rms..=(..)no voltage drops...just when i turn on heater or ac....sucks thoug....sometimes voltage drops so low that the car turns off sometimes...

 

[ARSkemp 10+ year member]

haha...when i play my stereo full tilt..(even thoug my sub is only 220 rms..=(..)no voltage drops...just when i turn on heater or ac....sucks thoug....sometimes voltage drops so low that the car turns off sometimes...

wow, can you find a dmm to see how much the voltage drops? Is it only when turning on the ac AND playing full tilt, or do you notice a significant change in voltage when using just the ac (w/o the stereo playing).

If the car's turning off there is definitely something wrong.

 

[andrew2944r 10+ year member]

lol, go have your Alt and battery tested, somethings not right...

 

[Linkz 10+ year member]

Voltage drop from turning on a heater is normal. So long as the drop is not severe you should be fine. If you start seeing your voltage go near the red line then I would suggest a test on your amp/battery as well as the heater.