• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Voltage drop at Kill Switch?

  • Thread starter Thread starter 1_v8_merc
  • Start date Start date
1

1_v8_merc

Guest
Okay guys, I hope this isn't a stupid question...

I have an 82 650, and it's getting massive voltage drops, when I flip the Kill Switch to "Run". Like over 1 volt drops within 2 or 3 seconds. I've been running resistance checks All Over this damn bike, ...and the drop is pointing to the Ignitor.

I've already replaced the Stator and Rectifier in this bike....I stupidly "assumed" they were okay!
I wonder if those components also hurt the Ignitor or Signal Generator?
Maybe a piece of solder broke loose in the Ignitor box?(I know that happened to a member here)

To top it all off....this bike HAD firing problems last summer...like it intermittently ran on 1 coil at random and had weak spark, even After I coil-modded it.


Just wonder what you guys think?
 
Last edited:
So the voltage drops 1 volt when ignition system is powered up, but it doesn't trip 10 amp ignition fuse?
Unplug spade connectors from both ignition coils, flip "run" switch on (to just power ignitor), same effect? Have you check ohms on coils?
Check ignitor connectors/wiring under seat, maybe it got abraded, but that should have blown ignition fuse.
Mine seems to drop noticeably (I run an onboard voltmeter) with key switched on- I'd say at least .7 volts. I have not done the coil mod, as bike starts and runs well.
 
Thanks tom, I should have disconnected the coils, just to be sure.

I wonder if the old charging system damaged the ignitor.
 
1_v8_merc said:
....

I wonder if the old charging system damaged the ignitor.
Click to expand...

Yes,possible, but those intermittent running problems last summer sound more like wiring or connections.
I meant to ask... are you a frequent kill switch user ? this is a likely weak area- I don't use mine at all.
 
Usaly "voltage drop" is a reference to a differernce in voltage from one point to another point where the voltage should be the same. Suxh as voltage drop between, say, the battery positive and the ignition swtich that should both be pretty much the same.

Please be more specific as to what you mean by 'voltage drop'.

You say "voltage drop at kill switch".

Do you mean the battery voltage drops when turn on the 'kill switch'?
On our GSes the kill swtich is in the igntiion circuit only. It only effects the ignition circuit (and starter button solenoid circuit).


.
 
Last edited:
If you simply move the switch to the RUN position, I would expect a voltage drop at the battery, simply because now you are enabling current to flow through the coils and ignitor. The ignitor itself will not draw much, but the coils certainly do. Try pulling the power plugs on the coils and trying your little test again.

Now, if you are measuring your voltage on both sides of the "kill" switch and finding a voltage drop there, you have problems in the switch. There should be virtually NO drop across the contacts inside the switch.

Please provide more details about where you are taking your measurements, under what conditions you are taking these measurements and what your actual readings are.

.
 
You must log in or register to reply here.
Back
Top