Technical Discussion Topics related to Technical Issues

No voltage at headlight

Thread Tools
 
Search this Thread
 
Old 05-13-2012, 05:05 PM
  #1  
2nd mouse gets the cheese
SuperBike
Thread Starter
 
Little_Horse's Avatar
 
Join Date: Jan 2008
Location: Beaverton, OR
Posts: 1,697
Little_Horse is on a distinguished road
No voltage at headlight

So I haven't seen this one before on the forum and I could use some help.

Here is what happened on start up I turn the ignition to on the headlight is working, it turns off when I press the starter button and never comes back on. Brights are gone too.

So checked the bulb, its fine, checked fuses they are fine, checked for voltage at the plug nothing, checked the switch its fine.

So the question is what part interrupts the headlight circuit on start up?

Thanks guys ~LH
Little_Horse is offline  
Old 05-13-2012, 05:13 PM
  #2  
Banned
MotoGP
 
8541Hawk's Avatar
 
Join Date: Aug 2007
Location: Lake View Terrace, CA
Posts: 5,942
8541Hawk will become famous soon enough
Check the contacts on the starter switch. There is a set of contacts that disconnect the headlight when you push the switch so you have more voltage to the starter.
8541Hawk is offline  
Old 05-13-2012, 05:14 PM
  #3  
2nd mouse gets the cheese
SuperBike
Thread Starter
 
Little_Horse's Avatar
 
Join Date: Jan 2008
Location: Beaverton, OR
Posts: 1,697
Little_Horse is on a distinguished road
what is the checking procedure on that?
Little_Horse is offline  
Old 05-13-2012, 05:15 PM
  #4  
2nd mouse gets the cheese
SuperBike
Thread Starter
 
Little_Horse's Avatar
 
Join Date: Jan 2008
Location: Beaverton, OR
Posts: 1,697
Little_Horse is on a distinguished road
just disconnect reconnect?

or is there a reading?
Little_Horse is offline  
Old 05-13-2012, 05:31 PM
  #5  
Banned
MotoGP
 
8541Hawk's Avatar
 
Join Date: Aug 2007
Location: Lake View Terrace, CA
Posts: 5,942
8541Hawk will become famous soon enough
On the plug where the starter switch plugs into the harness you should have continuity between Bu\W & Bl\R with the switch in the "normal" position and it should be open when you press the switch.

It's on the lower right of the schematic or page 19-20 of the service manual
8541Hawk is offline  
Old 05-13-2012, 05:34 PM
  #6  
2nd mouse gets the cheese
SuperBike
Thread Starter
 
Little_Horse's Avatar
 
Join Date: Jan 2008
Location: Beaverton, OR
Posts: 1,697
Little_Horse is on a distinguished road
Yeah, minimal testing equip and manual at the moment since I am 200 miles from home. It appears the relay may be faulty on that circuit I am just going to have to run a wire direct to get myself home but I thought it was worth a second opinion.
Little_Horse is offline  
Old 05-13-2012, 05:37 PM
  #7  
GTS
Seasoned tech
SuperSport
 
GTS's Avatar
 
Join Date: Apr 2012
Location: Issaquah, WA
Posts: 576
GTS is on a distinguished road
Looks like the starter switch is what turns the lights off when you start it. Checkfor voltage at the blue/white wire coming out of the starter switch. Or just check for continuity between the blue/white and the black/red wires through the starter switch with the connector dissconnected.
GTS is offline  
Old 05-13-2012, 06:30 PM
  #8  
Banned
MotoGP
 
8541Hawk's Avatar
 
Join Date: Aug 2007
Location: Lake View Terrace, CA
Posts: 5,942
8541Hawk will become famous soon enough
Sounds like there is an echo in here....

You can always put a jumper wire between the Bu\W & Bl\R wires at the plug and they should turn on.
or are you running one of the aftermarket relay kits? Though you are probably already on your way home by now.....lol

Last edited by 8541Hawk; 05-13-2012 at 08:06 PM.
8541Hawk is offline  
Old 05-13-2012, 07:33 PM
  #9  
Member
Squid
 
bikerpipes's Avatar
 
Join Date: Apr 2012
Location: Elizabeth City NC
Posts: 40
bikerpipes is on a distinguished road
Same thing happened to me I use some electrical contact cleaner sprayed it in the switch housing while working the switch lights came back on. Contacts get dirty.
bikerpipes is offline  
Old 05-14-2012, 08:39 AM
  #10  
Junior Member
Squid
 
chiknhauk's Avatar
 
Join Date: Feb 2012
Posts: 11
chiknhauk is on a distinguished road
make sure starter push-button comes all the way back out after pushing it in to start bike to complete connection.pull it out with ur fingers or screwdriver.my interceptor was like that.they do wear out from constant use
chiknhauk is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
CruxGNZ
Technical Discussion
25
04-30-2015 09:11 PM
CentralCoaster
Technical Discussion
9
11-12-2008 03:05 PM
wormeater
Technical Discussion
3
11-19-2006 10:52 AM
wormeater
Technical Discussion
1
11-12-2006 06:01 PM
mikecronis
General Discussion
2
11-27-2005 06:50 PM



Quick Reply: No voltage at headlight



All times are GMT -7. The time now is 03:36 AM.