Pulsating headlights 07 civic

Asked by Civicmase07 Dec 12, 2018 at 01:51 AM about the 2007 Honda Civic Coupe EX

Question type: Maintenance & Repair

Hey guys, the headlights on my 2007 civic have been
pulsating for a while now but tonight it was the worst.
Tested the battery with a multi meter and it read 14. We
disconnected the negative terminal and the car remained
running, which I was told if the car had died that would
mean bad alternator, the weird thing is when we re
connected the negative wire to the battery it temporarily
fixed the pulsating headlights... The more power I drew
(heat, stereo, etc,) the headlights would temporarily dim
then brighten back up. Revving the engine SOMETIMES
stops the pulsating. And like I said they dont always
pulsate. Tonight was very cold and it was the craziest I've
witnessed my headlights do that. Almost as of the var
needs to warm up? But sometimes I pull into my drive and
can see them pulsating after driving home from work. I
have yet to replace the battery or alternator, just looking for
some advice or maybe someone who experienced the
same thing and fixed it themselves?

6 Answers
22,300

Guru9FSV8 answered 5 years ago

Clean all your grounds on your car. Doing a voltage drop test can narrow your issue to what connection. Sand to bare metal. How are your terminals on your battery? Corrosion? Could be a wire with high resistance. You should be able to find this with this voltage drop test.

1 people found this helpful.
Mark helpful

Civicmase07 answered 5 years ago

Voltage drop test? Like I did on my terminals? Terminals are clean... could it be the wrong size battery? And would disconnecting the negative make the car IMMEDIATELY die of it is the alternator?

Mark helpful
22,300

Guru9FSV8 answered 5 years ago

YouTube this voltage drop test and you will get a complete guide to each step. ChrisFix and South Main Auto have good videos on this topic.

Mark helpful
157,475

Bob answered 5 years ago

Disconnecting a battery terminal from a running vehicle is one of those stupid short cuts that shouldn't be done. Disconnection the negative battery cable while the engine is running can send a surge or spike of electricity through the electric system and this may cause very expensive issues. The battery normally acts like a buffer for these surges and spikes. Question? Are the pulsating headlights stock or aftermarket? If they are stock I would think the alternator may have an issue with one of the diodes. Get it tested.

Mark helpful

Civicmase07 answered 5 years ago

Headlights are stock. I'll clean all grounds and connections in the morning. Thanks for the help guys. It just looks like changing this alternator is going to be a bitch without it being in the air and I just dont have the cash at this time... hoping someone had similar problems and there was an easy fix.

Mark helpful

Civicmase07 answered 5 years ago

Also sometimes as I arrive home I can see them pulsing against the garage door. Turning them off and then back will stop it, but then as I rev the engine the begin pulsating again... sound like alternator forsure to anyone following this thread? Could it be my battery?

Mark helpful

Your Answer:

Related Questions

  • Pulsating headlights 07 civic 6 Answers

    Hey guys, the headlights on my 2007 civic have been pulsating for a while now but tonight it was the worst. Tested the battery with a multi meter and it read 14. We disconnected the negative termin...

    2007 Honda Civic Coupe EX

    -

    Maintenance & Repair

  • Honda Civic 1994 license plate, headlights, dashboard lights 1 Answer

    Hi everyone, I would like to ask for help about my 2nd car, a honda civic 1994 coupe. Everytime I unlock my car using the remote, the headlights, license plate lights and dashboard lights works. B...

    1994 Honda Civic Coupe EX

    -

    Maintenance & Repair

  • Will the headlights out of a 06 Accord fit in my 06 Civic coupe 1 Answer

    Where the headlights out of 06 Accord fit in my 06 coupe

    2006 Honda Civic Coupe

    -

    Maintenance & Repair

  • Civic ex couple computer 4 Answers

    Hello everyone. Anyone knows if i can remplased my civic 2001 computer for a 2009? And what do i have to do? Or just conect it? Thanks

    2001 Honda Civic Coupe

    -

    Maintenance & Repair

  • 94 honda civic 3 Answers

    I have a 94 Honda civic recently I ran it low on gas. Now I will be driving while I'm driving it will stall out and either die or it's like it catches the gas and will continue to run.

    1994 Honda Civic Coupe DX

    -

    Maintenance & Repair

Civic Coupe

Looking for a Used Civic Coupe in your area?

CarGurus has 272 nationwide Civic Coupe listings starting at $3,981.

Postal Code:

Shortcuts

Search Honda Civic Coupe Questions

CarGurus Experts

  • #1
    deb5deb5deb5deb5deb5
    Reputation
    2,850
  • #2
    kd5qhr
    Reputation
    2,390
  • #3
    elmerenzo
    Reputation
    1,490
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Honda Civic
204 Great Deals out of 4,033 listings starting at $1,999
Used Honda Accord
50 Great Deals out of 965 listings starting at $2,995
Used Honda Accord Coupe
6 Great Deals out of 48 listings starting at $4,500
Used Toyota Corolla
140 Great Deals out of 2,270 listings starting at $3,495
Used Toyota Camry
49 Great Deals out of 1,110 listings starting at $2,500
Used Ford Mustang
42 Great Deals out of 1,603 listings starting at $8,995
Used BMW 3 Series
58 Great Deals out of 1,178 listings starting at $2,500
Used Honda CR-V
182 Great Deals out of 4,992 listings starting at $440
Used Mazda MAZDA3
67 Great Deals out of 1,325 listings starting at $2,900
Used Lexus IS
17 Great Deals out of 400 listings starting at $5,888

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.