voltage sap under braking

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Old Aug 9, 2005 | 02:51 PM
  #1  
efyou's Avatar
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Default voltage sap under braking

maybe im jus retarded...but i got a 91 si with a ls swap and i installed a voltmeter...when i start the car it reads about 13.5 volts and when i brake it drops down to almost 12...im thinkin that isnt normal...any input would be appreciated



Modified by efyou at 12:14 PM 8/10/2005
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Old Aug 14, 2005 | 05:36 PM
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sounds to me like your alternator isnt putting out enough volts..it should be around 14-14.5 when running..do all your lights work and working bright? could be resistance in the wiring causing it to draw more amps than it should..
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Old Aug 14, 2005 | 05:44 PM
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Default Re: (jdeemseerx)

bump i wana know too. mine does this time to time under braking, headlights on, or AC on.
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Old Aug 16, 2005 | 12:47 PM
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Default Re: (jdeemseerx)

well it damm well should i bought a new alternator from honda...and my lights are real bright but when i hit the brakes or turn the heat on or my fan switch i see major power sap and it doesnt seem to come bak to normal...so i dunno i replaced the battery cable, battery, alternator and starter all at once lol so im still stumped.

also...i remeber that i had to tighten the alternator belt awhile ago...maybe its not tight enuf?....and....i dont remember any of this happening until i put a diff drivers side door on...sounds strange...but when i did...the seatbelt beep and light kept goin off...so i jus disconnected all the bulbs and destroyed the circuitboard in the rear view mirror so it would shut the hell up lol...maybe thats the first time i NOTICED...i dunno...i have no clue.

ANDDD my brake lights didnt work after i put that door on...but instead my door/seatbelt light kept comin on when i hit the brakes...no powersap there until i replaced the brake light fuse so they work again.


Modified by efyou at 4:58 PM 8/16/2005
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Old Aug 16, 2005 | 02:09 PM
  #5  
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Default Re: (efyou)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by efyou &raquo;</TD></TR><TR><TD CLASS="quote">well it damm well should i bought a new alternator from honda...and my lights are real bright but when i hit the brakes or turn the heat on or my fan switch i see major power sap and it doesnt seem to come bak to normal...so i dunno i replaced the battery cable, battery, alternator and starter all at once lol so im still stumped.

also...i remeber that i had to tighten the alternator belt awhile ago...maybe its not tight enuf?....and....i dont remember any of this happening until i put a diff drivers side door on...sounds strange...but when i did...the seatbelt beep and light kept goin off...so i jus disconnected all the bulbs and destroyed the circuitboard in the rear view mirror so it would shut the hell up lol...maybe thats the first time i NOTICED...i dunno...i have no clue.

Sounds like you effed up the wiring somewhere and have a circuit thats grounding out

ANDDD my brake lights didnt work after i put that door on...but instead my door/seatbelt light kept comin on when i hit the brakes...no powersap there until i replaced the brake light fuse so they work again.


Modified by efyou at 4:58 PM 8/16/2005</TD></TR></TABLE>
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Old Aug 22, 2005 | 03:20 PM
  #6  
efyou's Avatar
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Default Re: (PURPLETERROR)

but where would it be? i took the door panel off and looked at all the wiring..even the speaker wire and found nothing wrong.. warped alternator belt? i know when the car isnt warm(middle of h & c) yet and i start driving and hit brakes for long enuf the voltage drop is real bad....but then after that the gauge reads a lil above 12 while driving...ughhhh someone helpppp



Modified by efyou at 8:12 PM 8/22/2005
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Old Aug 22, 2005 | 04:08 PM
  #7  
efyou's Avatar
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Default Re: (efyou)

bump
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Old Aug 22, 2005 | 06:17 PM
  #8  
efyou's Avatar
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Default Re: (efyou)

bump again
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