Go Back   GZ 250 Forums > GZ250-Specific > Instructional Articles

Reply
 
Thread Tools Display Modes
Old 10-05-2019, 12:24 AM   #131
wacio
Senior Member
 
Join Date: Apr 2016
Location: Illinois
Posts: 174
Quote:
Originally Posted by 5th_bike View Post
The voltage drop is simply from the wire resistance, your headlight draws several amperes so part of the battery voltage gets lost as heat in the wiring. To get a better reading, connect the wires closer to the battery, or on a circuit that doesn't draw much current. At the horn, the voltage only drops a bit when you honk. The yellow wire at the horn is 12V, I connected the +12V (red) wire of my tach there.
Not connecting it to headlight bulb wiring. I'm using brown wire that was some option in harness - also in the headlight enclosure. From schematic it does not seem to be connected to anything else...

BTW: Checked voltage at the horn - its 11V. Maybe my ground somewhere is weak



Login or Register to Remove Ads

Last edited by wacio; 10-05-2019 at 12:28 AM.
wacio is offline  
Reply With Quote
Old 10-05-2019, 03:43 AM   #132
alantf
Senior Member
 
alantf's Avatar
 
Join Date: Nov 2008
Location: Tenerife (Spain)
Posts: 3,715
European bikes have a 5w parking light along with the headlight, so this could be the unused wire that you see in the headlight bucket.
__________________
By birth an Englishman, by the grace of God a Yorkshireman.
alantf is offline  
Reply With Quote
Old 10-17-2019, 12:35 AM   #133
5th_bike
Senior Member
 
5th_bike's Avatar
 
Join Date: Oct 2007
Location: HoCo, Maryland
Posts: 1,349
Quote:
Originally Posted by wacio View Post
Not connecting it to headlight bulb wiring. I'm using brown wire that was some option in harness - also in the headlight enclosure. From schematic it does not seem to be connected to anything else...

BTW: Checked voltage at the horn - its 11V. Maybe my ground somewhere is weak
I got similar readings as you did, a lower voltage at the horn than at the battery itself. Considering the measurement was taken with the lights on (can't switch them off, US bike), I'd say the horn circuit and the other ones like the brown wire in the headlamp branch off somewhere between the battery and the lights - after the main fuse. No worries about "weak ground".

Ah well, it seems there is no other possibility to get battery voltage than at the battery itself, because the remainder of the electric circuits works under a bit lower voltage. It isn't too hard to squeeze a wire between the battery poles and clamps. Quite easy to route too, along with the wire harness under the tank. Do keep away from the hot engine head. And include an inline 10A or so fuse for the red wire, right at the battery.
__________________
2005 "Saturn Black", stock + tach



Login or Register to Remove Ads

Last edited by 5th_bike; 10-17-2019 at 10:32 PM. Reason: Added a bit.
5th_bike is offline  
Reply With Quote
Old 10-19-2019, 11:30 PM   #134
wacio
Senior Member
 
Join Date: Apr 2016
Location: Illinois
Posts: 174
I use the voltmeter to verify state of battery and charging system. I'm OK with the voltage drop as long as its normal. As long as I see normal consistent value - allowing me to verify battery state and higher voltage while running - indicating its charging, I don't think adding extra wires is worth the effort just to see actual battery voltage...
wacio is offline  
Reply With Quote
Old 10-26-2019, 08:08 PM   #135
5th_bike
Senior Member
 
5th_bike's Avatar
 
Join Date: Oct 2007
Location: HoCo, Maryland
Posts: 1,349
Quote:
Originally Posted by wacio View Post
I use the voltmeter to verify state of battery and charging system. I'm OK with the voltage drop as long as its normal. As long as I see normal consistent value - allowing me to verify battery state and higher voltage while running - indicating its charging, I don't think adding extra wires is worth the effort just to see actual battery voltage...
Well it seems normal, I think it's because of the resistance of the main fuse. And, apologies for the misinformation, about 12V being available at the horn.
__________________
2005 "Saturn Black", stock + tach



Login or Register to Remove Ads
5th_bike is offline  
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

BB 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 04:56 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.