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I was sitting in a hj's drive through this morning and when ever i activated my power windows my car's rev's would dip to almost stalling. I'm wondering if this could be caused by my altinator??

Also if i am driving along at night with headlights and stereo on and i press the brake pedal to stop my stereo will reset sometimes, could these 2 things be related?

My car starts every morning and the battery is only a few months old.

Any help would be much appriciated :P

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I was sitting in a hj's drive through this morning and when ever i activated my power windows my car's rev's would dip to almost stalling. I'm wondering if this could be caused by my altinator??

Also if i am driving along at night with headlights and stereo on and i press the brake pedal to stop my stereo will reset sometimes, could these 2 things be related?

My car starts every morning and the battery is only a few months old.

Any help would be much appriciated :P

Is there anything else about your car that has changed stereo or electrical wise? I have a V35 and I started getting wierd problems like that when I upgraded my sound system. The battery was simply too weak to handle it. I bought an optima yellow top and all of the strange power issues vanished.

I'm no expert, but that's my 2 cents. Hope that helps.

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Is there anything else about your car that has changed stereo or electrical wise? I have a V35 and I started getting wierd problems like that when I upgraded my sound system. The battery was simply too weak to handle it. I bought an optima yellow top and all of the strange power issues vanished.

I'm no expert, but that's my 2 cents. Hope that helps.

what sort of strage electrical issues where u having? I upgraded my battery just after i put more stereo in so i dont think that that is it, but thanks for your help :P any one else?

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Have you got a multimeter? If so start your car and put it on the terminals of the battery It should read between say 13.8 to 14.4ish of the top of my head if it is around that it won't be your alternator....

Maybe a dead plate/ cell in the battery even though it is new... also check what volts the battery has before you start it... Most ECUs wont work properly with less then say 9 to 10 volts

or big drop in amps.. Take it back to the place you bought it and get them to do a load test on it..

Hope that helps.

Edited by 99 GTT
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