Problem #1


Information and questions on GL1500 Goldwings (1988-2000)
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Uncle Fester
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Problem #1

Postby Uncle Fester » Tue Oct 28, 2014 6:42 pm



Okay, today I stopped to pick up the wife from work, sat there idling for a few mins on the side stand, when the wife came out, we got back on the bike, put it in gear and it sounded like 1/2 the engine shut off, but the bike still ran. As soon as I put the side stand up, smoothed right out and ran fine.

My guess is side stand switch, but I am not sure what it is doing wrong. . . . can I get a confirmation or another direction to look please. If a confirmation, HOW DO I FIX IT?

P.S.
I am VERY careful not to drive off with the side stand down now, but . . . .


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virgilmobile
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Re: Problem #1

Postby virgilmobile » Wed Oct 29, 2014 6:54 am

As I understand,with the bike running,if you take it out of neutral with the side stand down..it completely kills the ignition.Mine does.
the side stand switch may not be making a good contact.Look there first.

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WingAdmin
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Re: Problem #1

Postby WingAdmin » Wed Oct 29, 2014 10:31 am

Looking at the circuit, I can't see a way that the side stand being down can affect the ignition in this way - if it is in gear, with the side stand down, the ECM should kill the ignition, completely. This is the way it is supposed to work.

I suppose it's possible that a dirty switch, that is not providing a full ground, either in the side stand switch or the gear position switch, along with an ECM that is not functioning correctly, could *possibly* cause poor ignition - but I would have to examine the internal circuit diagram of the ECM to determine whether or not this is possible, and I don't know if such a thing (the circuit diagram) is available anywhere. I'm thinking that perhaps the component inside the ECM that is responsible for grounding or otherwise killing the ignition, triggered by the side stand switch, might not be working correctly.

Can you reproduce the issue? If you put the side stand back down, does the engine start running rough again?

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Uncle Fester
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Re: Problem #1

Postby Uncle Fester » Wed Oct 29, 2014 10:42 am

I have tried it twice more today, and not able to reproduce it, so maybe it was a one time thing. . . .weird.
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brettchallenger
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Re: Problem #1

Postby brettchallenger » Wed Oct 29, 2014 11:08 am

Could it be a problem with your fuel pump? Apparently, 94-96 models can succumb to this. If you are sat idling, especially if the ambient temperature is relatively high, your engine could have got hot and caused the pump to temporarily malfunction. There is some info here about it - http://www.berrysweb.com/1500_fuel_pump.htm
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Uncle Fester
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Re: Problem #1

Postby Uncle Fester » Wed Oct 29, 2014 11:11 am

The temp at the time it happened was only in the low to mid 70s, and was cool enough that the fans (that do work) had not kicked on, so I do not think that is the problem, but I will look into that too. . . . THANKS.
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brettchallenger
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Re: Problem #1

Postby brettchallenger » Wed Oct 29, 2014 11:56 am

Low to mid 70s in England is a heat wave!
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Follow your spirit: and upon this charge,
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robb
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Re: Problem #1

Postby robb » Wed Oct 29, 2014 7:29 pm

Mine 89 will not start with the side stand down and transmission in neutral, even with clutch handle pulled. But raise stand and start and it runs fine when stand is lowered. Ask dealer if it could be related to bank angle sensor and they said NO. The sensor on my bike is the original part, not swapped under recall.

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WingAdmin
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Re: Problem #1

Postby WingAdmin » Wed Oct 29, 2014 8:32 pm

robb wrote:Mine 89 will not start with the side stand down and transmission in neutral, even with clutch handle pulled. But raise stand and start and it runs fine when stand is lowered. Ask dealer if it could be related to bank angle sensor and they said NO. The sensor on my bike is the original part, not swapped under recall.


The circuit for the starter is a bit complex, but here's basically how it works:

The bank angle switch, when not triggered, closes relay 8. This supplies power from fuse 2, through relay 8, to the starter switch. When the starter switch is pushed, it sends power to the coil of the reverse relay switch, which closes its contacts.

When these contacts are closed, power is fed from the starter switch into the coil of starter relay A, and from there through the contacts of the reverse relay switch.

At this point, the power must find a ground, or else starter relay A will not close, and the starter will not run. It goes to two diodes, and from there goes either to the neutral switch (which grounds it if the transmission is in neutral), or through the clutch switch, then through the side stand switch, and from there to ground.

If both your neutral light and your sidestand indicator light work correctly, then most likely one of the diodes in your diode pack has failed - the one leading from the starter to the neutral switch (in yellow, below):

Starting System Diagram
Starting System Diagram

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Uncle Fester
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Re: Problem #1

Postby Uncle Fester » Wed Oct 29, 2014 8:34 pm

WOW! They couldn't keep it SIMPLE huh ? That is a crazy route to get the bike started. . . . :roll:
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WingAdmin
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Re: Problem #1

Postby WingAdmin » Wed Oct 29, 2014 8:36 pm

Uncle Fester wrote:WOW! They couldn't keep it SIMPLE huh ? That is a crazy route to get the bike started. . . . :roll:


When it comes to the electrics on this bike, nothing is simple. Some of it is mind-boggling and takes a while of sitting and staring to figure out just how it works.

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robb
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Re: Problem #1

Postby robb » Wed Oct 29, 2014 8:43 pm

WingAdmin is this something to worry over or not. If so where is that diode liocated.

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WingAdmin
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Re: Problem #1

Postby WingAdmin » Wed Oct 29, 2014 9:49 pm

It's part of the reverse diode assembly, behind the right saddlebag and under the trunk (saddlebag has to be removed to access it):

Reverse Diode Assembly
Reverse Diode Assembly




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