No spark


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TechSpeaker
Posts: 18
Joined: Fri Dec 29, 2017 12:18 pm
Location: Stephenville TX
Motorcycle: 1978 GL1000

No spark

Post by TechSpeaker » Thu May 09, 2019 1:07 pm



Hey guys, I've been in the process of rebuilding my '78, and I've gotten to the wiring harness which I'm rebuilding from scratch. I have no spark, even though I have new spark plugs, new coils, new caps, new points, and a new battery. I've adjusted my points. I'm currently just checking one plug.

What I have right now is I've bypassed the ignition switch, (which means its always gonna act as if its on, so to check stuff where the key needs to be off i just disconnect the battery) so I'm sending power from the battery straight to the black wire. (I don't have my 30 amp fuse either, but that shouldn't matter right now, should it?) I have the stop switch connected. The black wire and the red and yellow wire on the starter switch are connected. the red and yellow wire to the diode / rectifire is connected and the brown and black wire to the diode, ballast resister, and stop switch is connected. The black wire to my ballast resistor is also connected. My solenoid is connected to the start button but I immediately ground it out, bypassing the starter disconnect switch.

At first I thought it was my diode/rectifier thing, coming off of the red and yellow wire, but it's bypassed when the starter button is pressed and there is still no spark.

All the wires on the plug to the coils are connected, and there is a good 12 volts going to the coils. What else should I check? I'm getting flustered as I really think everything should be working right now....

It does turn over by the way. Also, it wasn't running when I got it.

(http://www.classiccycles.org/media//DIR ... ffe415.pdf Here's a quick link to the wiring diagram, by the way)



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virgilmobile
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Re: No spark

Post by virgilmobile » Thu May 09, 2019 3:41 pm

If you have 12 volts to the coils,you should also have 12 volts on the points when there open.
The act of closing the points and opening them makes the spark.

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TechSpeaker
Posts: 18
Joined: Fri Dec 29, 2017 12:18 pm
Location: Stephenville TX
Motorcycle: 1978 GL1000

Re: No spark

Post by TechSpeaker » Fri May 10, 2019 5:04 pm

virgilmobile wrote:
Thu May 09, 2019 3:41 pm
If you have 12 volts to the coils,you should also have 12 volts on the points when there open.
The act of closing the points and opening them makes the spark.
What’s the best way to check the points? I fiddled around with them a bit with my voltmeter but I’m really not sure what I’m doing with them...

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virgilmobile
Posts: 8831
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: No spark

Post by virgilmobile » Fri May 10, 2019 6:52 pm

Do you have a regular test light that you probe a wire for volts?
It's the easiest tool to work with.

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TechSpeaker
Posts: 18
Joined: Fri Dec 29, 2017 12:18 pm
Location: Stephenville TX
Motorcycle: 1978 GL1000

Re: No spark

Post by TechSpeaker » Fri May 10, 2019 7:02 pm

virgilmobile wrote:
Fri May 10, 2019 6:52 pm
Do you have a regular test light that you probe a wire for volts?
It's the easiest tool to work with.
Test light? I'm not sure... maybe?

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TechSpeaker
Posts: 18
Joined: Fri Dec 29, 2017 12:18 pm
Location: Stephenville TX
Motorcycle: 1978 GL1000

Re: No spark

Post by TechSpeaker » Mon May 27, 2019 5:39 pm

I ended up solving it guys. It was quite a tricky mess. It turns out that one of the breaker point arms was rotated and touching the base of the points. Because of the way the coils are wired (they both get power from the same wire), this caused all my coils to short out through the points. It took forever to see it but I got my bike to run for the first time now!!

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landisr
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Location: Gilbert, AZ
Motorcycle: 1976 GL1000
1976 GL1000LTD
1994 GL1500A

Re: No spark

Post by landisr » Sun Jun 02, 2019 11:19 am

Congrats! Now get out there and RIDE! :mrgreen:
I'm not so sure about an inner child, but I have an inner idiot that surfaces every now and then.. :mrgreen:

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TechSpeaker
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Joined: Fri Dec 29, 2017 12:18 pm
Location: Stephenville TX
Motorcycle: 1978 GL1000

Re: No spark

Post by TechSpeaker » Sun Jun 02, 2019 3:35 pm

landisr wrote:
Sun Jun 02, 2019 11:19 am
Congrats! Now get out there and RIDE! :mrgreen:
Oh I'm excited. I have a bunch of stuff to make because I've pulled the entire thing apart and have to replace stuff. Last registered in 2000 and I just got it running about a week ago for the first time. I'm super excited. I mostly have to get new suspension, some cables and wires, and steering set back up. I've taken a lot of videos documenting the process and I'm about to make part one of a two part video. It's very close to rideable.



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