Haynes Forums  

Go Back   Haynes Forums > Haynes Roadster Forums > Electrics
FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #1  
Old 5th October 2020, 04:59 PM
old_bill old_bill is offline
Senior Member
 
Join Date: Oct 2007
Location: Glasgow
Posts: 120
Lightbulb Headlights staying on.

Wired up headlights but they won’t go off. They all work perfectly ie side, dip, beam and flash. Side lights come on from stalk and the mains come on from ignition. There is a black and brown connected to pin 56 on both stalks and lights operate when this is earthed. Any help appreciated.
Bill
D7AB9E36-CBB8-4DBE-81F8-4FD39D574385.jpg
__________________
Bill

http://www.flickr.com/photos/old_bill/
Reply With Quote
  #2  
Old 5th October 2020, 09:39 PM
Tatey's Avatar
Tatey Tatey is offline
Senior Member
 
Join Date: May 2009
Location: Leicester
Posts: 827
Default

Bill, it sounds like there is either a faulty switch or a short circuit on the main headlight circuit.

If you disconnect 56A do they still come on with the ignition? If do come on even with it disconnected it sounds like a faulty relay.

If they don't come on with it disconnected it sounds like a faulty headlight switch.
__________________
1.8 Silvertop Zetec (ZX6R Carbs + Megajolt) + Type 9

My Build Blog: http://www.haynes.co.uk/forums/showthread.php?t=2736 - Last Update: 31st October 2020

Total Spent so far: Stopped counting
Reply With Quote
  #3  
Old 6th October 2020, 06:08 PM
old_bill old_bill is offline
Senior Member
 
Join Date: Oct 2007
Location: Glasgow
Posts: 120
Default

Hi Tatey
Did as you suggested. Lights stay on when disconnected.
Checked relays and stalks (have spares and replaced). Still have continuous circuit. I can’t fathom how the lights are operated from the right hand stalk. I connected pin 30 to +ve and when in second position pin 56 lights the test lamp. I thought this pin was the earth. I think I’ve just done something stupid, but for the life of me can’t figure out what.
Bill
__________________
Bill

http://www.flickr.com/photos/old_bill/
Reply With Quote
  #4  
Old 6th October 2020, 10:18 PM
twinturbo's Avatar
twinturbo twinturbo is offline
Super Moderator
 
Join Date: Jul 2008
Location: Carlisle
Posts: 4,389
Default

These sierra stalk/wiring? if so what year so i can dig out the diagram
__________________
You only get a woosh with a dump valve

Build Thread


Man Cave Mantiques



Cecil Street Auto Repairs Garage Carlisle




Build Cost £4181.65 - Last - Wheel Cylinders
Reply With Quote
  #5  
Old 6th October 2020, 11:37 PM
old_bill old_bill is offline
Senior Member
 
Join Date: Oct 2007
Location: Glasgow
Posts: 120
Default

Hi Twinturbo
They are sierra stalks from 1992 sapphire 1.8cvh. I’ve spent days trying to figure out what’s wrong. I have two fused wires from the battery to pin 30 on the relays. Two wires from the ignition to pins 86 on relays. Pins 87 on the relays activate headlights. Pin 56b ( brown & white ) to 85 on dip relay and 56a to 85 on
High beam relay. Brown and black from pin 56 on right hand stalk to 56 on left hand stalk, this is earthed.
The dipped lights come on when ignition switched on (pos 2) even though position 2 on light stalk not activated. The lights work fine when left hand switch is put on high beam or flash. POS 1 on light stalk activates side lights. Bloody things won’t go off until ignition off or disconnect 56 from earth.
I have changed relays and stalks but still the same problem.
__________________
Bill

http://www.flickr.com/photos/old_bill/
Reply With Quote
  #6  
Old 7th October 2020, 10:18 AM
Tatey's Avatar
Tatey Tatey is offline
Senior Member
 
Join Date: May 2009
Location: Leicester
Posts: 827
Default

Bill, if you have grounded pin 56 that is connected to both switches this sounds like it is your issue.

Both switches should have ground on pin 15 and pin 31 not on 56. Pin 56 just needs to be connected between the two switches.

Grounding pin 56 is by passing two of the switches.
__________________
1.8 Silvertop Zetec (ZX6R Carbs + Megajolt) + Type 9

My Build Blog: http://www.haynes.co.uk/forums/showthread.php?t=2736 - Last Update: 31st October 2020

Total Spent so far: Stopped counting
Reply With Quote
  #7  
Old 7th October 2020, 03:05 PM
old_bill old_bill is offline
Senior Member
 
Join Date: Oct 2007
Location: Glasgow
Posts: 120
Thumbs up

Thanks Tatey you were dead right. Just had to earth to pin 31 and headlights now working fine.
Feel a bit like that guy in the Simpsons DOHh
Many thanks you’ve made me a happy man
__________________
Bill

http://www.flickr.com/photos/old_bill/
Reply With Quote
  #8  
Old 7th October 2020, 06:39 PM
Tatey's Avatar
Tatey Tatey is offline
Senior Member
 
Join Date: May 2009
Location: Leicester
Posts: 827
Default

I'm pleased I could be of help and that it was a simple fix!
__________________
1.8 Silvertop Zetec (ZX6R Carbs + Megajolt) + Type 9

My Build Blog: http://www.haynes.co.uk/forums/showthread.php?t=2736 - Last Update: 31st October 2020

Total Spent so far: Stopped counting
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 +1. The time now is 02:08 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.