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View Full Version : battery light comes on with E brake handle up


vanillajuice
12-09-2008, 07:08 PM
anyone got any ideas as to why my battery light comes on everytime i pull up the ebrake? this nonsense just started.....

Jncominco2
12-10-2008, 11:19 AM
any recent wiring done?

PARANOID56
12-10-2008, 12:09 PM
loose bat connections? maybe check the blinker fluid. :D

vanillajuice
12-10-2008, 01:34 PM
only thing done recently is the LED's in the gauge cluster

Jncominco2
12-10-2008, 02:44 PM
you might have crossed some wires
did you do any splicing and stuff?

msesno
12-10-2008, 03:56 PM
Or maybe you or whoever did the led's replugged the battery sensor into the e brake plug? If its only when you pull it up that the light goes on, it might be meant to happen!

Only other thing I can think of is that leds draw WAY less current so the ecu might be thinking that you're battery is going dead.... was it always like this after the cluster change?

Jncominco2
12-10-2008, 04:03 PM
usually if you do LED's, you need to put resistors inline with them also
that could be it...maybe ><

PARANOID56
12-10-2008, 04:38 PM
usually if you do LED's, you need to put resistors inline with them also
that could be it...maybe ><

if he did this it would just burn out the LEDs, sounds like they are still working.
hmm

msesno
12-10-2008, 04:58 PM
if he did this it would just burn out the LEDs, sounds like they are still working.
hmm


Not if they're inserted after the LEDs in series then its just tricking your ecu to think its using the same amount of power as a filament would from the total amount of resistance (R1+R2=Rtot). If it's in parallel then you have to divide 1/R1+1/R2=1/Rtot and it would burn it out. Correct me if I'm wrong.

I actually don't know how the gauge cluster is wired, but like when you put LED's in the blinker its triggered to tell you when one is out by blinking twice as fast... and it will do that even if the LEDs are working because they resist MUCH less current so the ecu thinks one or both is out. Don't know if this is the same situation or not, and I have no idea why it would flick a light only when the brake is up... but if its always been like this since the swap that could have something to do with it.

GL let us know what you find

vanillajuice
12-10-2008, 05:34 PM
ummmm....they are just led bulbs....u know..the kind u just stick in the dash instead of a reg 74 bulb...the tripower led 74 bulbs...
http://superlumination.com/images/auto_bulbs/74_3led_r_wm.jpg
...NO REWIRING...but they do work awesome...really nice color and very even...no hotspots...nice...deep...dark red

msesno
12-10-2008, 05:57 PM
Hmm pics? Show us what you got! Was it hard to install?

As for your battery light... maybe the less resistance from the LED's are throwing the CEL? Did it just start happening recently or right after you swapped in the LEDs?

Jncominco2
12-10-2008, 07:21 PM
ummmm....they are just led bulbs....u know..the kind u just stick in the dash instead of a reg 74 bulb...the tripower led 74 bulbs...
http://superlumination.com/images/auto_bulbs/74_3led_r_wm.jpg
...NO REWIRING...but they do work awesome...really nice color and very even...no hotspots...nice...deep...dark red

you dont understand
LED bulbs draw more current than a normal bulb
thats why if you put them in your driver switch or cruise control, you have to put a resistor in

msesno
12-10-2008, 08:03 PM
you dont understand
LED bulbs draw more current than a normal bulb
thats why if you put them in your driver switch or cruise control, you have to put a resistor in

LESS current, and burn cooler than incandescent bulbs... but produce more light. For example, a 5 watt LED will have a luminous efficiency of 18-22 lumens per watt while a 50 watt incandescent produces about 15 lumens per watt. With LEDs they use less energy, and put out more light visible to the eye which can be defined as 'efficacy'.

Efficiency of a bulb is about the ratio of power/current input to amount of light output.

Efficacy of a bulb, is the ratio of power/current to the amount of light VISIBLE to a specific spectrum curve. (In this case, whats visible to the eye.)


Anyway somehow I got off topic and am not sure if this is the reason for your battery light to come on when the brake is pulled up but that is why blinkers blink twice as fast when one is out because the ecu is designed to let you know when the total amount of resistance over a circuit has changed! Hope that info helps though, and good luck with your dash! Have any pics of the red in there?? :devil:

vanillajuice
12-11-2008, 12:21 AM
cant get pics of the gauges...they dont come out looking anything like they do in person....i am pretty sure they draw LESS current....not more...but anyways..if that was the case ...then why only when the e brake is on? oh well...i spose ill just deal with it....or just take out the light for the battery icon hehe...course my airbag one has been on for 2 years ...ive gotten used to it lol

PARANOID56
12-11-2008, 03:11 AM
Not if they're inserted after the LEDs in series then its just tricking your ecu to think its using the same amount of power as a filament would from the total amount of resistance (R1+R2=Rtot). If it's in parallel then you have to divide 1/R1+1/R2=1/Rtot and it would burn it out. Correct me if I'm wrong.

I actually don't know how the gauge cluster is wired, but like when you put LED's in the blinker its triggered to tell you when one is out by blinking twice as fast... and it will do that even if the LEDs are working because they resist MUCH less current so the ecu thinks one or both is out. Don't know if this is the same situation or not, and I have no idea why it would flick a light only when the brake is up... but if its always been like this since the swap that could have something to do with it.

GL let us know what you find


lol, yea, i know what you are saying, but in the cluster its not wired that way. hes just got led bulbs that have resistors attached at each led. super simple install.i have build lots of LED arays and such so i know all those fun formulas

msesno
12-11-2008, 11:39 AM
cant get pics of the gauges...they dont come out looking anything like they do in person....i am pretty sure they draw LESS current....not more...but anyways..if that was the case ...then why only when the e brake is on? oh well...i spose ill just deal with it....or just take out the light for the battery icon hehe...course my airbag one has been on for 2 years ...ive gotten used to it lol

I'd love to see pics even if they don't come out well, I hate my green but am scared to pull out the cluster etc! :lol:

Back on track, is there a plug for the e brake light that plugs into the cluster? You may have accidentally plugged the e brake sensor back into the battery light plug? Thats honestly the only thing I can think of but again I'm not too sure because I haven't pulled mine out before! As for the airbag light, do you have swapped seats? I've heard airbag sensors coming on when seats are swapped because diff years are spec'd a little different... GL again

msesno
12-11-2008, 11:39 AM
lol, yea, i know what you are saying, but in the cluster its not wired that way. hes just got led bulbs that have resistors attached at each led. super simple install.i have build lots of LED arays and such so i know all those fun formulas

Oooh! Can ya build me one? :devil: I hate my green!

PARANOID56
12-11-2008, 12:29 PM
Oooh! Can ya build me one? :devil: I hate my green!

read up on here. i changed mine all to red, but sanding down the original green gels sucked. then i just put in premaid ones into the stock location. i did convert a bunch of my other trucks to have full LED modules in them LOL

OP, put a piece of black tape over the light, and BAM, its gone :D

vanillajuice
12-11-2008, 09:00 PM
ya sanding the green sux ass....took me a few hours...didnt wanna break em. i dont have a camera either so another reason for pics...even if i did this stupid site doesnt let me post pics anyways....my dads rsx has the red gauges and i turned my accord gauges red and now my wrx ones....green is like vomit color

there are only 3 plugs on the cluster...3 big green ones...just put them back in the same spot i took em out of......

Cougar4
12-11-2008, 09:21 PM
Someone else has the same problem. Here is a link to the thread if you want to check it out. Your problem may be due to having a LED instead of a lamp for the battery warning light.
http://forums.nasioc.com/forums/showthread.php?t=1499053

Does your alternator have two or three leads on the back side of it? This is important since the designs are different.

vanillajuice
09-29-2009, 09:12 PM
this issue is fixed! thanks Cougar4!!!! Took out the LED bulb and put in a reg one...no more battery light!

Cougar4
09-30-2009, 02:02 PM
Glad to hear the light is off now but I'm not sure if this is the real good way to fix the trouble. There may be some damaged parts in the circuit still. Does the warning light turn on when you turn the ignition ON without the engine running?

vanillajuice
09-30-2009, 03:04 PM
Glad to hear the light is off now but I'm not sure if this is the real good way to fix the trouble. There may be some damaged parts in the circuit still. Does the warning light turn on when you turn the ignition ON without the engine running?

yea then turns off when the car starts...and is not on with the e brake anymore...i mean i put in the led bulb...issue started...took out the led bulb...issue went away

Cougar4
09-30-2009, 09:32 PM
Are you saying the LED bulb was not in there originally and you put one in? If so, I guess I could see why that would be a problem.

vanillajuice
10-07-2009, 08:24 PM
right....it had a reg bulb...i put in the led bulb....thats when the brake light started to come on with the e brake....took out the led bulb..put a reg bulb in...and the problem went away....so no wiring issues...just me being an idiot lol

Cougar4
10-07-2009, 09:51 PM
Ok. Thanks for clearing that up......about the bulb that is. lol. Glad you got it working and thanks for the feedback.

vanillajuice
10-07-2009, 11:42 PM
heck yea! and thank u for the solution lol...ill try not to do that again in the future