This will take you to the main site where there is history, technical information and other information on these cars.
This takes you back to the main page of the forums.
This is the control panel to change your password, information and preferences on this message board.
Click here if your lost your password or need to register on this message board. You must be a registered user to post. Registration is free.
Search this board for information you need.
Click here to buy cool Squarebirds mechandise.
Click here to support Squarebirds.org. For $20 annually receive 20mBytes webspace, a Squarebirds e-mail address and member's icon on the message board.
  #1  
Old 01-20-2012, 10:36 PM
lexdownunder lexdownunder is offline
Birdy
 
Join Date: Sep 7 2010
Posts: 85
lexdownunder is on a distinguished road
Default Headlights

I'm having trouble with headlights cutting in & out. I rarely drive at night but coming home from a car show last weekend, after about 15 minutes of driving with the headlights on, they would cut out for about 5 seconds then come on again for a few seconds then out again. It's only the headlights. Tail, stop & dash lights are perfect. I was only on low beam too. This happened last year & I replaced the dip switch which I was told may have been the problem.
Am I right that there is a bi-metal strip in the headlight switch that will heat up & act like the "make & break" in an indicator flasher unit???
Would a new headlight switch fix the problem or is there something else I can check first???

Thanks Guys
Lex
Reply With Quote
  #2  
Old 01-21-2012, 12:33 AM
simplyconnected's Avatar
simplyconnected simplyconnected is offline
Slow Typist
 
Join Date: May 26 2009
Posts: 7,073
simplyconnected is on a distinguished road
Default

Do you hear a 'clicking' sound when this happens? My instincts tell me you have a circuit breaker that is overloaded.

Follow your ears and locate the sound. Then unplug one headlight and see if the power still cycles. If so, you may have a short somewhere, causing excessive current draw.

The Technical Resource Library has electrical drawings showing color-coded wires. Every device plugs-in and so do wire harnesses. You can trace from the headlights back, or from the headlight switch forward.

We had a member whose breaker was cycling because of rusty license plate light sockets causing a short. I'm not suggesting this is your problem but when you find the cause, it will be an. 'a-ha' moment.

Troubleshoot your headlight circuit. It is very simple, starting at the headlight switch, then to the floor dimmer switch, through the firewall, and finally to your headlight lamps. Look for rust on the floor switch, and loose connections.

Do not forget your grounds. They are equally as important as your feed wires, but they use a terrible conductor (your car's steel body). - Dave
__________________
My latest project:
CLICK HERE to see my custom hydraulic roller 390 FE build.

"We've got to pause and ask ourselves: How much clean air do we need?"
--Lee Iacocca
Reply With Quote
  #3  
Old 01-21-2012, 04:24 AM
scumdog's Avatar
scumdog scumdog is offline
Super-Experienced
 
Join Date: May 12 2006
Posts: 1,338
scumdog is on a distinguished road
Default

It will most likely be a tired bi-metallic strip in the light switch.

I fixed it by fitting a double relay so the power circuit that use to go to the main/dip headlights was just used to 'trigger' the relay, separate power supply direct from the starter solenoid/relay to the lighing relay...and hence to the headlights.

No problems since and brighter lights.
__________________
A Thunderbirder from the Land of the Long White Cloud.
Reply With Quote
  #4  
Old 01-21-2012, 06:51 AM
lexdownunder lexdownunder is offline
Birdy
 
Join Date: Sep 7 2010
Posts: 85
lexdownunder is on a distinguished road
Default Headlights

Thanks Dave & Scumdog.
Dave, I haven't noticed any "clicking" sounds so I'm thinking there is no relay/circuit breaker but will check it out tomorrow. My "gut feeling" is that there is overload on the bi-metallic strip in the switch & that a relay will rectify the problem.
Thanks again guys. You two have given me plenty to check out.

Take care & have a great weekend.
Lex
Reply With Quote
  #5  
Old 01-21-2012, 10:54 AM
jopizz's Avatar
jopizz jopizz is offline
Excellent Auto Mechanic for over 40 years.
 
Join Date: Nov 23 2009
Posts: 4,750
jopizz is on a distinguished road
Default

If you look at the wiring diagram you'll notice there's a 12 amp circuit breaker that comes off the dimmer switch. This may be your problem or it may be the dimmer switch itself. The circuit breaker is in the dash on the drivers side near the ignition switch. Mine is held in place by two screws that hold the top switch. I'm not sure what holds it in place on a hardtop.

Last edited by jopizz : 01-21-2012 at 10:59 AM.
Reply With Quote
  #6  
Old 01-21-2012, 06:43 PM
simplyconnected's Avatar
simplyconnected simplyconnected is offline
Slow Typist
 
Join Date: May 26 2009
Posts: 7,073
simplyconnected is on a distinguished road
Default

jopizz is the winner of this one. '58's and '59's both have circuit breakers. One is before the dimmer switch and the other is after. I knew the headlight switch doesn't have one, but I forgot about the remote breakers.

Adding a relay under the hood (for future, high-amp sealed beams) is a good thing but for now, find out why the 12-amp circuit breaker is tripping. They are inexpensive to replace. - Dave
__________________
My latest project:
CLICK HERE to see my custom hydraulic roller 390 FE build.

"We've got to pause and ask ourselves: How much clean air do we need?"
--Lee Iacocca

Last edited by simplyconnected : 01-21-2012 at 09:55 PM.
Reply With Quote
  #7  
Old 01-21-2012, 07:10 PM
lexdownunder lexdownunder is offline
Birdy
 
Join Date: Sep 7 2010
Posts: 85
lexdownunder is on a distinguished road
Default Headlights

Thanks fellas. You guys are awesome!!!!!
Will let you know what the outcome is when I get it sorted.

Cheers
Lex
Reply With Quote
Reply


Thread Tools
Display Modes

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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 12:58 AM.

Driving, racing or working on cars can be hazardous. The procedures and advice on this website including the message board are opinion only. Squarebirds.org and its webmasters and contributors do not guarantee the correctness of the advice and procedures. The Squarebirds.org and its webmasters assume no liability for any damage, fines, punishment, injury or death resulting from following these procedures or advice. If you do not have the skills or tools to repair your car, please consult a professional. By using this site you agree to hold harmless the Squarebirds.org, its authors and its webmasters from any resulting claim and costs that may occur from using the information found on this site.

Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Any submissions to this site and any post on this site becomes property of Squarebirds.org . The webmasters reserve the right to edit and modify any submissions to this site. All material on this is site is copyrighted by the Squarebirds.org. Reproduction by any means other than for personal use is strictly prohibited. Permission to use material on this site can be obtained by contacting the webmasters. Copyright 2002-2016 by Squarebirds.org.