lights dimming? Options

[pabel89]

ok i dont know whats going on, and this didnt use to happen but everytime i press my breaks or just tap them my headlights dim they flash. anyone know why? is it normal that my car idle two lines under 1rpm?

This post has been edited by pabel89: Apr 5, 2008 - 9:59 PM

[goferris]

ok i dont know whats going on, and this didnt use to happen but everytime i press my breaks or just tap them my headlights dim they flash. anyone know why? is it normal that my car idle two lines under 1rpm?

either a bad battery or alternator is my guess. it's almost time for me to replace my alternator. i'd like to get a high output alternator so it can handle a larger sound system as well as get an Optima attery.
i would get yours checked.

[joehernandez]

like ferris said, the alternator or the battery.
if it dims and you can notice it pretty bad, its the alternator.
but check the battery for free at a autozone just to make sure.
and my car idles the same as yours, so i guess it is normal.

[808celica]

replaced my battery 2 months ago.......and car still dims........

now i know what to do........

if you hear a clicking noise under the hood, put your ear next to the alternator and listen for any whoopping/ clicking noise with the engine on of course..............

[stevest202]

put a multimeter across battery while car running you should get about 13/14 volts going in if alt is ok

[pabel89]

my altenator and my battery are brand new. but thats not my concern right now, whats bothering me is that everytime i press my brake the headlights and all the lights on my car flash. i can be in a complete stop and i press the brakes they flash , or i can be moving and as i slow down they flash?what can it be.

[Batman722]

put a multimeter across battery while car running you should get about 13/14 volts going in if alt is ok

It doesn't matter if they are new, just try this anyway.

what exactly do you mean by flash ? like strobe ? or just dim out and come back to normal repeadily ?

can you explain that a little better for me ?

[pabel89]

yea exactly they dim and get back to normal.

[punkuup5150]

mine do the same thing it also happens if i use my power windows lol i cant figure it out my alt and bat r good i cant figure it out ither ive even taken a scan tool to it and no codes pop up so i dunno i figure its a bad ground somewhere ive looked everywhere but cant find it i do know i need to re d9 all my ground wires they r way to small gage of wire like 12-10 gage i mean puny stuff but ill prolly do that when i rebuild my motor its all factory wireing i had it checked at toyota and they couldnt figure it out also i figured it was just soemthing with celicas