2007 Honda Civic voltage drop down

Tiny
BINO
  • MEMBER
  • 2007 HONDA CIVIC
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 44,117 MILES
I have installed a voltage stabilizer + voltage reader + ground wire + 1200w audio amplifier + 3.0 farad capacitor + xenon light, everything was good but now I removed the xenon light and changed the battery.

while stopping in a traffic light, everytime when the A/C compressor works the car lights dim, and when I turn the fan to full speed and the headlight and fog light on the voltage drop to 11.9 - 12.1 and the car RPM goes below the average and I feel the car will shutdown, but when I move the voltage goes up to 13.4 - 13.6.

in the morning when I start the car the voltage reader gives 13.8 - 13.9 but when I start the A/C its gives 13.6 and when the compressor start it goes to 12.9 and then goes to 13.5, when its off its return to 13.6.


any sulotion for the dim? If I change the ground wire it will help? Or my battery ( amp hour - 20 HR RATE) 45. If I change it to 60 Amp h?

i need help please.
Saturday, June 5th, 2010 AT 7:19 AM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi bino,

You are overworking the battery and alternator and replacing with a higher capacity battery can somewhat improve on the situation but might not be sufficient as the alternator output needs to be increased as well.
Was this
answer
helpful?
Yes
No
Saturday, June 5th, 2010 AT 8:43 AM
Tiny
BINO
  • MEMBER
  • 2 POSTS
As the alternator output needs to be increased as well.

How?
Was this
answer
helpful?
Yes
No
Monday, June 7th, 2010 AT 12:53 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
You would need to find an alternator with a higher output.

The R18A1 alternator output is 90 Amp whereas the K20Z3 output is 105 Amp.

Whichever you have, an additional 10 to 15 Amp would be desireable.
Was this
answer
helpful?
Yes
No
Monday, June 7th, 2010 AT 9:23 AM

Please login or register to post a reply.

Sponsored links