Electrical gurus -- help! - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

 
LinkBack Thread Tools Display Modes
post #1 of 9 Old 08-08-2016, 09:14 PM Thread Starter
1st Gear
 
Join Date: Jul 2016
Location: East GTA
Posts: 43
Electrical gurus -- help!

My headlight decided to quit sometime between wednesday and last night, and of course I was nowhere near home. No biggie, CAA came and got me, but now it's time to fix it.

I'm trying to follow the wiring diagram, and I'm pretty sure I'm reading it correctly (also common sense...) when it says the red wire at the left bar switch cluster is positive.

Well, there's 0 resistance to negative, and something like -340ohms resistance to positive on that wire with ignition on. I can't make any sense of this.

What's driving me mad is that, if positive is shorted straight to ground, shouldn't *everything* stop working? Wouldn't wires be blowing up?

What the heck is going on?!
drumstyx is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 08-09-2016, 08:01 AM
5th Gear
 
Join Date: Jan 2011
Posts: 4,334
Suggestion: Take another look at the wiring diagram:

http://circuitswiring.com/circuit-di...aki-klr650.jpg

I don't find the RED wire of which you speak. Switched + 12 VDC is found on the BROWN wire.

And . . . is your headlight fuse o.k.? A controversial subject, but . . . some say, on a Generation 1, the hi/lo beam switch can momentarily ignite BOTH filaments, overloading the OEM 10-amp headlight fuse; solution: Substitute a 15-amp fuse.
Damocles is offline  
post #3 of 9 Old 08-09-2016, 09:02 AM Thread Starter
1st Gear
 
Join Date: Jul 2016
Location: East GTA
Posts: 43
Quote:
Originally Posted by Damocles View Post
Suggestion: Take another look at the wiring diagram:

http://circuitswiring.com/circuit-di...aki-klr650.jpg

I don't find the RED wire of which you speak. Switched + 12 VDC is found on the BROWN wire.

And . . . is your headlight fuse o.k.? A controversial subject, but . . . some say, on a Generation 1, the hi/lo beam switch can momentarily ignite BOTH filaments, overloading the OEM 10-amp headlight fuse; solution: Substitute a 15-amp fuse.
It's incredibly dumb, but it turned out to be the bulb. I assumed it wasn't because they both went out at the same time seemingly.

That said, there's still the oddity of what seems like ground on the positive wire. On that diagram, it's the solid red wire directly above the red/white wire in the left bar cluster.
drumstyx is offline  
 
post #4 of 9 Old 08-09-2016, 09:24 AM
5th Gear
 
Join Date: Jan 2011
Posts: 4,334
Looks like that RED wire receives switched +12 VDC, feeding (ultimately) instrument lights; when ignition switch is ON, the RED is connected to the RED/WHITE wire, feeding the tail light.
Damocles is offline  
post #5 of 9 Old 08-09-2016, 09:28 AM Thread Starter
1st Gear
 
Join Date: Jul 2016
Location: East GTA
Posts: 43
Yeah, that makes sense, but doesn't explain why I was getting 0 resistance to ground from it, unless maybe I was measuring with ignition off and off = grounded for that wire. I don't recall if I had ignition on or not.

I couldn't find any chafing on the harness anywhere, so presumably it's all working correctly -- clearly the headlight isn't a problem anymore, and I'm just a dummy! :P
drumstyx is offline  
post #6 of 9 Old 08-09-2016, 04:55 PM
4th Gear
 
GoMotor's Avatar
 
Join Date: May 2014
Location: Texas
Posts: 1,250
I wonder how you were making contact with the red wire. By nicking a bit of the insulation or by unplugging the harness plug from the switch and connecting your probe through the plug.
GoMotor is offline  
post #7 of 9 Old 08-09-2016, 06:39 PM Thread Starter
1st Gear
 
Join Date: Jul 2016
Location: East GTA
Posts: 43
Oh definitely by unplugging. That's important to get the whole circuit in chunks. Turned out to stupidly be the bulb though...guess I'll carry a spare, as the high beam doesn't work even though it looks fine in the bulb
drumstyx is offline  
post #8 of 9 Old 08-09-2016, 07:54 PM
5th Gear
 
Join Date: Jan 2011
Posts: 4,334
If you unplug the headlight, put one voltmeter probe in the ground slot, the other probe in the high-beam and then the low-beam slot, with the ignition switch on, while manipulating the high/low beam headlight switch, you should be able to tell whether your problem is with your headlight bulb or not.
Damocles is offline  
post #9 of 9 Old 08-09-2016, 07:56 PM Thread Starter
1st Gear
 
Join Date: Jul 2016
Location: East GTA
Posts: 43
Quote:
Originally Posted by Damocles View Post
If you unplug the headlight, put one voltmeter probe in the ground slot, the other probe in the high-beam and then the low-beam slot, with the ignition switch on, while manipulating the high/low beam headlight switch, you should be able to tell whether your problem is with your headlight bulb or not.
Come to think of it, yeah, that was the first thing I did, I forgot about that. I was getting 0 volts on both high and low, regardless of the switch. Maybe I didn't have the probe in far enough... Perhaps a few too many beers while troubleshooting.
drumstyx is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki KLR 650 Forum forums, you must first register.
Please enter your desired user 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:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Electrical Q Lockjaw KLR & Other Motorcycle Related Discussion 10 11-08-2015 03:37 PM
Help with electrical Tom Schmitz 2008+ KLR650 Wrenching & Mod Questions 41 03-25-2015 11:39 PM
Any Computer Gurus Out There planalp The Off Topic Lounge 6 01-31-2015 05:21 AM
Any Computer Gurus Out There? planalp The Off Topic Lounge 19 06-14-2014 05:21 PM
Electrical Problem Garyp138 1987 to 2007 Wrenching & Mods 11 05-27-2012 04:00 PM

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

 
For the best viewing experience please update your browser to Google Chrome