Honda Civic Forum

Electrical Post your questions about electrical issues here!

Headlights flicker with RPM change

   
Old Dec 27, 2020
Share
  #1  
devolic's Avatar
devolic
Thread Starter
Registered!!
 
Joined: Jul 2009
Posts: 17
Likes: 0
From: Alpena, MI
Rep Power: 0
devolic is an unknown quantity at this point
Cool Headlights flicker with RPM change
Hi guys title says it all. They don't completely go dark but dim as engine speed changes. The dealer said that the alternator is fine and the battery has been replaced with the same result. Seems like some kind of voltage regulator or something like that. what do you think?
Reply
0
Old Dec 27, 2020
Share
  #2  
BrotatoChip's Avatar
BrotatoChip
Super Moderator
 
Joined: Jun 2012
Posts: 5,073
Likes: 2,096
From: Ohio
Rep Power: 224
BrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud of
Re: Headlights flicker with RPM change
Voltage regulator is part of the alternator. Do they dim enough where it's really noticeable?
Reply
0
Old Dec 27, 2020
Share
  #3  
xRiCeBoYx's Avatar
xRiCeBoYx
Administrator
Hey! Look At Me!! I'm a Supporting Member!!
Administrator
iTrader: (22)
 
Joined: Aug 2003
Posts: 21,620
Likes: 1,252
From: Las Vegas, NV
Rep Power: 512
xRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond repute
Re: Headlights flicker with RPM change
ELD also has a role in voltage regulation, as well. I couldn't tell you how that thing works. I had my 2002's ELD start to go, and cause a bunch of other codes to be thrown, but one was definitely a P1298. I replaced the ELD (like a $20 part and takes 10 minutes), reset codes, and the other seemingly random codes went away.

A bit of dimming under low load/low RPM is normal.
Reply
0
Old Dec 27, 2020
Share
  #4  
devolic's Avatar
devolic
Thread Starter
Registered!!
 
Joined: Jul 2009
Posts: 17
Likes: 0
From: Alpena, MI
Rep Power: 0
devolic is an unknown quantity at this point
Re: Headlights flicker with RPM change
yes, at idle they don't dim. if I just touch the accelerator it's noticeable even in park.
Reply
0
Old Dec 27, 2020
Share
  #5  
devolic's Avatar
devolic
Thread Starter
Registered!!
 
Joined: Jul 2009
Posts: 17
Likes: 0
From: Alpena, MI
Rep Power: 0
devolic is an unknown quantity at this point
Re: Headlights flicker with RPM change
Originally Posted by xRiCeBoYx
ELD also has a role in voltage regulation, as well. I couldn't tell you how that thing works. I had my 2002's ELD start to go, and cause a bunch of other codes to be thrown, but one was definitely a P1298. I replaced the ELD (like a $20 part and takes 10 minutes), reset codes, and the other seemingly random codes went away.

A bit of dimming under low load/low RPM is normal.
What does ELD stand for?
Reply
0
Old Dec 27, 2020
Share
  #6  
BrotatoChip's Avatar
BrotatoChip
Super Moderator
 
Joined: Jun 2012
Posts: 5,073
Likes: 2,096
From: Ohio
Rep Power: 224
BrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud ofBrotatoChip has much to be proud of
Re: Headlights flicker with RPM change
Electronic load detector. Basically it determines how much electrical demand there is and can control the alternator based on that info.
Reply
0
Old Dec 28, 2020
Share
  #7  
EM2-EMMA's Avatar
EM2-EMMA
I’m a guy. My car’s name is Emma.
 
Joined: Apr 2020
Posts: 91
Likes: 4
From: Virginia
Rep Power: 0
EM2-EMMA is an unknown quantity at this point
Re: Headlights flicker with RPM change
Originally Posted by devolic
yes, at idle they don't dim. if I just touch the accelerator it's noticeable even in park.
Im having the same issue. I’ve yet to replace the ELD or the alternator. I do have a new battery. I’ll try those remedies and let you know.
Reply
0
Old Dec 29, 2020
Share
  #8  
devolic's Avatar
devolic
Thread Starter
Registered!!
 
Joined: Jul 2009
Posts: 17
Likes: 0
From: Alpena, MI
Rep Power: 0
devolic is an unknown quantity at this point
Re: Headlights flicker with RPM change
Originally Posted by EM2-EMMA
Im having the same issue. I’ve yet to replace the ELD or the alternator. I do have a new battery. I’ll try those remedies and let you know.
ok thnx, tell me what you find out.
Reply
0
Old Dec 29, 2020
Share
  #9  
xRiCeBoYx's Avatar
xRiCeBoYx
Administrator
Hey! Look At Me!! I'm a Supporting Member!!
Administrator
iTrader: (22)
 
Joined: Aug 2003
Posts: 21,620
Likes: 1,252
From: Las Vegas, NV
Rep Power: 512
xRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond repute
Re: Headlights flicker with RPM change
If you guys want some reading material about the ELD

Meet your ELD - Electrical Load Detector....

Part number and removal in this post of mine
Reply
0
Old Dec 29, 2020
Share
  #10  
EM2-EMMA's Avatar
EM2-EMMA
I’m a guy. My car’s name is Emma.
 
Joined: Apr 2020
Posts: 91
Likes: 4
From: Virginia
Rep Power: 0
EM2-EMMA is an unknown quantity at this point
Re: Headlights flicker with RPM change
Awesome. Thanks
Reply
0
Old Feb 10, 2021
Share
  #11  
EM2-EMMA's Avatar
EM2-EMMA
I’m a guy. My car’s name is Emma.
 
Joined: Apr 2020
Posts: 91
Likes: 4
From: Virginia
Rep Power: 0
EM2-EMMA is an unknown quantity at this point
Re: Headlights flicker with RPM change
Originally Posted by devolic
ok thnx, tell me what you find out.
So I haven’t changed out the ELD or alt yet but my issue has gone away. Lol

you know that law of thermodynamics that says stuff will fix it self? 😜
Reply
0
Old Mar 22, 2022
Share
  #12  
EM2-EMMA's Avatar
EM2-EMMA
I’m a guy. My car’s name is Emma.
 
Joined: Apr 2020
Posts: 91
Likes: 4
From: Virginia
Rep Power: 0
EM2-EMMA is an unknown quantity at this point
Re: Headlights flicker with RPM change
Late response. Issue came back. Replaced eld. Been working fine since then
Reply
0
Related Topics
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
headlights and gauge lights going from dim to bright, alternator?
IronFist
I.C.E. (Audio) & Electrical Upgrades
5
Sep 25, 2015 07:13 PM
New alternator is overcharging already?
Bricoleur
I.C.E. (Audio) & Electrical Upgrades
4
Sep 9, 2015 12:23 PM
Flickering headlights but good alternator
RobertK
Mechanical Problems/Vehicle Issues and Fix-it Forum
17
Nov 9, 2012 11:20 PM
Headlights dimming?
teenwolf
I.C.E. (Audio) & Electrical Upgrades
1
Oct 25, 2008 12:03 PM
headlights dim
tdiddy
Mechanical Problems/Vehicle Issues and Fix-it Forum
4
Dec 16, 2003 02:32 AM
Back to Subforum
Electrical
View Next Unread
All power door locks not functional. Fuses OK


Thread Tools
Search this Thread
Search this Thread:

Advanced Search

Advanced Search

All times are GMT -5. The time now is 11:53 AM.