spark


Information and questions on GL1200 Goldwings (1984-1987)
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robw
Posts: 1
Joined: Mon Sep 02, 2013 4:57 pm
Location: St Louis MO
Motorcycle: 1986 GL1200A Aspencade

spark

Postby robw » Mon Sep 02, 2013 5:02 pm



I have spark on the left and right front plugs...no spark on rear plugs Bike is a 1986 gl1200A aspencade. Can anybody give me an idea of what is wrong or how to check for what is wrong?



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dnehasert
Posts: 132
Joined: Sun Sep 27, 2009 11:25 pm
Location: Mesa AZ.
Motorcycle: 1982 GL1100 with Watsonian sidecar

Re: spark

Postby dnehasert » Tue Sep 03, 2013 9:24 pm

Sounds a bad ignition coil, I'd suggest you need to buy a service manual a Goldwing is best but a Clymer manual can tell you how to troubleshoot.

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wjnfirearms
Posts: 397
Joined: Mon Oct 01, 2012 9:51 pm
Location: Portersville, Pennsylvania
Motorcycle: 1977 GL1000
1980 KZ750 LTD
2007 H-D XL1200C
Contact:

Re: spark

Postby wjnfirearms » Wed Sep 04, 2013 7:39 am

One of the oldest tricks to see if a coil is firing is to disconnect it from a plug or remove the plug if you don't have any spares around. Connect the wire back to the plug, hold the threaded part of the plug against the engine block being careful to use a clean surface to make a good ground contact at the plug and block (you might want to use pliers to hold the plug for safety sake), crank the engine to see if there's any spark.

First, make sure that the connections at the coil are tight and not damaged. This happened to my son's Kawasaki recently and one of the wires connected to the coil came loose, that's all.
Member, Patriot Guard Riders, Blue Knights LEMC, PA VII

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virgilmobile
Posts: 7663
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: spark

Postby virgilmobile » Wed Sep 04, 2013 8:06 am

The ignition system has just 3 parts...for each half of the engine...

A pulse coil X2
A ignition coil X2
A ignition module...2 seperate parts in one box...

The most likley cause of one half of the total system to fail is....
A corroded connection on the 4 wire plug to the left of the battery..(pulse coils connector)

A open winding or bad wiring on the dead side ignition coil....This includes the spark plug wire....It takes 2 plugs on one ignition coil to get a spark.2 plugs fire at the same time.
Resistance measurments can be compared to the firing plugs right at the plug caps.

One of the pulse coils opened up....Resistance measurments at the pulse coil plug are easy to check.

And least likley is the ignition module....not impossible but very unlikley..A downloadable service manual can show every test for each part....




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