Coil Problem 1985 Aspencade


Information and questions on GL1200 Goldwings (1984-1987)
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JTourjee
Posts: 2
Joined: Thu Apr 05, 2012 12:33 pm
Location: Penrose, Colorado
Motorcycle: 1985 GL1200 Aspencade

Coil Problem 1985 Aspencade

Postby JTourjee » Thu Apr 05, 2012 12:42 pm



Hi all, I'm new here. Bought my first Aspencade this past Sunday! It needs a bit of help, so we are in the process of getting it up and running, later we'll repaint it. My question is this, we tested the coils, and had juice going in to the coils, but none coming out. They'd also shock you if you touched them, so it was definitely coming out the wrong places! I replaced the coils today, and still no go. Juice going into the coils, none coming out. I'm at a loss for this one? Any ideas would be greatly appreciated!
jon



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virgilmobile
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Motorcycle: 1988 GL1500 I
Previously owned
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Re: Coil Problem 1985 Aspencade

Postby virgilmobile » Thu Apr 05, 2012 8:52 pm

There essentially 4 electrical connections for each coil.The high voltage side is the spark plug wires.there is no common ground for each plug wire.they depend on 2plugs being hooked up,you can't get just one to spark if it's other wire is left just hanging loose.The input is low volts.12 volts in and the other end goes to the ignition module.the 12 volts goes in the coil and,if you unplug the module,should come out the other terminal.Now remember,when cranking,the ignition module side will have a 400 volt pulse on it, and it requires both plugs to show a spark.

dkcloud
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Location: corpus christi texas
Motorcycle: 1984 GL1200 Interstate

Re: Coil Problem 1985 Aspencade

Postby dkcloud » Fri Apr 06, 2012 1:33 am

Use an Ohm meter to test the coils.
Check for continuity across the primary "low voltage" side. ( this would be a low value )
Check the secondary " high voltage "side for continuity. ( This would be a higher value )
The secondary side is checked from the tower the spark plug wire plugs into for + (pos) and a grounding lug or what ever bolts the transformer to ground for a - (neg)

If there is an open in either side, the transformer is bad.
The gl1200 ignition system is electronic and the ignition transformers are supposed to run on aprox 3 volts.
The high voltage wires to the plugs may be aged and leaking energy.
If this is the case, the wires can be replaced.
I replaced mine with Dyna coils but this is a challenge to mount these coils.
I used Accel yellow jacket stranded wire from the coil to the plugs.
Remember, the ends are reusable

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virgilmobile
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Re: Coil Problem 1985 Aspencade

Postby virgilmobile » Fri Apr 06, 2012 11:47 am

Now, I maybe wrong,but I don't believe the secondary winding uses a common ground for each of it's plug wires.It is one massive coil that sparks 2 plugs at the same time.it relies on each plug for the ground path.If you unhook both wires from one coil and attach just one plug,the spark will be poor if at all.It needs both plugs on the coil.

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WingAdmin
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Re: Coil Problem 1985 Aspencade

Postby WingAdmin » Fri Apr 06, 2012 3:18 pm

virgilmobile wrote:Now, I maybe wrong,but I don't believe the secondary winding uses a common ground for each of it's plug wires.It is one massive coil that sparks 2 plugs at the same time.it relies on each plug for the ground path.If you unhook both wires from one coil and attach just one plug,the spark will be poor if at all.It needs both plugs on the coil.


That's correct. That's why the anode wears on the plugs on one side of the engine, and the cathode wears on the plugs on the other side.

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virgilmobile
Posts: 7660
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: Coil Problem 1985 Aspencade

Postby virgilmobile » Fri Apr 06, 2012 5:20 pm

Also the ignition module dumps a great deal of current.even tho the DC volts may measure low,expect a heck of a pulse there.

JTourjee
Posts: 2
Joined: Thu Apr 05, 2012 12:33 pm
Location: Penrose, Colorado
Motorcycle: 1985 GL1200 Aspencade

Re: Coil Problem 1985 Aspencade

Postby JTourjee » Sat Apr 07, 2012 12:28 am

So, how do I just test the coils? Do they need to be hooked to the spark plugs? I have them hooked to the battery, but no juice is going thru the coils that I can tell. Sorry, this is Tanya, Jon's wife, he's at work, and I'm not a mechanic, or mechanically inclined, so this may be a stupid question. Do the coils need hooked up to be grounded or something to be able to tell if juice is going thru them?
tanya




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