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Classic Goldwing Technical Forums
GL1100
Help diagnose by listening to my sick 1982 Goldwing GL1100
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<blockquote data-quote="dan filipi" data-source="post: 25013" data-attributes="member: 54"><p>First off, testing for spark on all 4 plugs:</p><p></p><p>Our bike uses a wasted spark design.</p><p>This means that 2 spark plugs work as a pair and get a spark at the same time.</p><p>Each of these 2 plug pairs (4,3 and 2,1) relies on the other to complete the circuit to produce a spark.</p><p></p><p>For this reason in order for plug 4 to spark, plug 3 must be plugged to the wire and the ground side (threads) must be touching ground.</p><p>The same is true for plug pair 2 and 1.</p><p></p><p>I suggest pulling all plugs, put the wires on them and lay them on the engine block so the threads are grounded.</p><p>Now crank it with the kill switch on and check for spark at all 4 plugs at the same time.</p><p>What to check next will depend on what you see.</p><p></p><p>The clutch making the neutral light come on:</p><p></p><p>The neutral light always has a +12 to it when the key is on.</p><p>The neutral switch provides the - ground to light the bulb as well as provide - ground to the starter relay.</p><p>The clutch lever supplies only - ground to the start relay.</p><p></p><p>Since the neutral switch and the lever switch provide ground to the start relay there has to be something inline to prevent the neutral going to the light when the lever is pulled, that is done by the diode.</p><p>A diode is a one way valve, it allows current flow only in one direction so.......</p><p>when pulling in the clutch, the - ground will not go to the light.</p><p></p><p> :heat:</p></blockquote><p></p>
[QUOTE="dan filipi, post: 25013, member: 54"] First off, testing for spark on all 4 plugs: Our bike uses a wasted spark design. This means that 2 spark plugs work as a pair and get a spark at the same time. Each of these 2 plug pairs (4,3 and 2,1) relies on the other to complete the circuit to produce a spark. For this reason in order for plug 4 to spark, plug 3 must be plugged to the wire and the ground side (threads) must be touching ground. The same is true for plug pair 2 and 1. I suggest pulling all plugs, put the wires on them and lay them on the engine block so the threads are grounded. Now crank it with the kill switch on and check for spark at all 4 plugs at the same time. What to check next will depend on what you see. The clutch making the neutral light come on: The neutral light always has a +12 to it when the key is on. The neutral switch provides the - ground to light the bulb as well as provide - ground to the starter relay. The clutch lever supplies only - ground to the start relay. Since the neutral switch and the lever switch provide ground to the start relay there has to be something inline to prevent the neutral going to the light when the lever is pulled, that is done by the diode. A diode is a one way valve, it allows current flow only in one direction so....... when pulling in the clutch, the - ground will not go to the light. :heat: [/QUOTE]
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Classic Goldwing Technical Forums
GL1100
Help diagnose by listening to my sick 1982 Goldwing GL1100
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