weird headlight problem - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 04-02-2005, 06:03 PM
Member
 
Last photo:
Join Date: Jan 2005
Location: boston, ma
Age: 34
Posts: 76
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
weird headlight problem

Hey guys, Hope there is a guru who can figure this out for me, its a 94 ford ranger, 4.0L...my headlights flash after about 20 min of being on. When I disconnect the right bulb, the flashing stops, the left one stays on continuously. I had a previous problem of the right bulb going out, I replaced the headlight assembly, stopped the bulb going out, was fine for about 2 weeks, then this flashing problem started up. I figured it was in the plug, so I replaced it, still flashing after 20 min of driving. Any ideas of what might be causing this? Thanks, Adam

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 04-02-2005, 06:32 PM
bracketeer's Avatar
489 Lemans
 

Last journal entry: Street Legal
Last photo:
Join Date: Dec 2004
Location: Courtenay, BC, CehNehDeh
Age: 55
Posts: 2,139
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
wild guess

I would guess you have a short crossing over into your signal light circuit. When the headlight starts flashing. Listen to see if you can hear the signal light flasher.
__________________
[URL]http://members.shaw.ca/g.body.building[/URL]
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 04-02-2005, 06:37 PM
Member
 
Last photo:
Join Date: Jan 2005
Location: boston, ma
Age: 34
Posts: 76
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Never hear that, it flashes on both sides, kind of like I'm in a rush to get somewhere, people pull over sometimes. Don't hear any clicking or see the arrow come up on the dash, its strange. Thanks for the help. - A
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 04-02-2005, 06:44 PM
bracketeer's Avatar
489 Lemans
 

Last journal entry: Street Legal
Last photo:
Join Date: Dec 2004
Location: Courtenay, BC, CehNehDeh
Age: 55
Posts: 2,139
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
burglar alarm

Do you have a burglar alarm or remote start setup? Both of these are tied into your headlight circuit.
__________________
[URL]http://members.shaw.ca/g.body.building[/URL]
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 04-02-2005, 06:53 PM
67 Deuce 4 Me's Avatar
Bowtie or Die!
 
Last photo:
Join Date: Dec 2004
Location: TN
Age: 43
Posts: 637
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Has it been in a accident i.e. hit in the front and repaired? Flashing on and off, or between high and low beam? Sounds like a lose ground to me. The reason both lights flash is that the headlights are wired together usually the left light has splices that go over to the right light. Try running a temporary ground wire to the light ckt just a jumper wire will do usually the wire is black. and see if it stops flashing. Also could have a lose connection @ the switch or maybe a bad switch. There isn't too many things that will cause that problem. Also the dimmer in the column can be bad Fords have alot of problems out of the multifunction switch on the column. hope this helps ...Ed
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 04-02-2005, 07:52 PM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Lights

Doc here,

In addition to what deuce Said about ground, and Clues about it being in an accident before...may have been mis-wired by whoever did the work...

It sounds like your headlights are wired in Series...one wire feed for both lights...Either power or ground...Causing both to die with the loss of one or the other..

Check to be sure each lamp has a separate run from the firewall plug to the light for power..Then check the ground wire, be sure you have separate grounds for both..in fact, just run 2 new grounds.

Hope it helps!

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 04-02-2005, 08:06 PM
NorthStar's Avatar
Member
 
Last photo:
Join Date: Feb 2003
Location: Minnesota
Age: 51
Posts: 847
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
My Mustang has this same problem 5 seconds after I put high beams on it starts flashing. Once in a while even low beams act up.
I think Ford has put a circuit breaker into the light switch they get old and over sensitive like old people.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 04-03-2005, 04:19 AM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Single headlight

Doc here,

Another thing that can cause "A" ("single" ) headlight to go on and off at will...is the filament is burned out ever so slightly...and vibrating against the rest of the filament structure causing the light to go on and off...(Ever smack one with your hand to get it to work for awhile? ) BUT that shouldn't effect BOTH headlights..just the one with the burned out filament.

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 04-03-2005, 01:09 PM
Member
 
Last photo:
Join Date: Jan 2005
Location: boston, ma
Age: 34
Posts: 76
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Its never been in an accident, i'm the third owner so I don't know for sure, but if it was, they did a REAL good job. They don't flash hi-beam to low-beam, the lights dim on and off. The weird thing is that when I disconnect the right one, the left light stays on steady. I'll give the ground wire a shot first. Thanks, Adam
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 04-03-2005, 08:50 PM
Member
 
Join Date: Nov 2004
Location: rio de janeiro
Posts: 224
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I just had the same problem with brand new seald beams on a '68 Mustang!
Nothing against China,but they are chinese.Replaced for old General Electric and the flashing went away...
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 04-03-2005, 09:35 PM
Old enough to know better
 
Join Date: Aug 2004
Location: Denver, CO
Posts: 417
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Aftermarket, high-watt headlights will also cause it in some systems. Overloads the factory breaker which cycles on and off.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 04-04-2005, 07:13 AM
daimon1054's Avatar
Member
 
Join Date: Oct 2003
Location: Louisiana
Posts: 496
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
It does sound more like a breaker just because it takes some time for it to happen. It could be ground and that was my first thought but again the time thing is what leads me to think breaker. Do they dim or go out all togther? Could also be in the switch, if it is worne it could be getting hot causing a gap or break in the circuit.

Put a volt meter on the line near the light and make sure it is dropping volts, then find the power wire on the switch and see if it is dropping there as well. Then check the power wire going into the switch and see if it's dropping there.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 04-05-2005, 12:57 PM
Member
 
Last photo:
Join Date: Jan 2005
Location: boston, ma
Age: 34
Posts: 76
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
They dim, they don't go out all together. I'll do those tests, just have to get the meter, needed one for a while now. - Adam
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 04-05-2005, 02:52 PM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Dim

Doc here,

When you say just Dim and not go out...EXACTLY what is happening?

You may have an entirely Different problem...Like an alternator starting to go south...Need more Exact info ...

You will need the meter in either case (and it's a good addition to your toolbox anyway) So get that first.

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 04-05-2005, 05:19 PM
67 Deuce 4 Me's Avatar
Bowtie or Die!
 
Last photo:
Join Date: Dec 2004
Location: TN
Age: 43
Posts: 637
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
sounds like a ground! I bet a dollar against a dough nut you have bad ground or grounds. Lights are dim because there trying to ground threw the filaments and what you think is low power is power trying to get to ground. and the resistance in the filaments heat up = dim light. See it all the time at the shop.
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine stalling problem JamesRS Engine 3 01-30-2006 11:22 AM
Ignition Problem malibuman66 Electrical 17 01-24-2006 01:05 AM
Overheating problem slik Engine 7 09-16-2004 06:59 PM
Weird problem DoubleVision Engine 5 08-01-2004 08:34 PM
Weird Gas leaking problem....help??!?!?! TheZaZ Engine 5 09-21-2003 01:29 PM


All times are GMT -6. The time now is 12:03 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.