1988 GL1500 shut down with no spark


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BUCKY AKINS
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1988 GL1500 shut down with no spark

Postby BUCKY AKINS » Thu Apr 03, 2014 8:47 pm



Was wondering if anyone could with this:
I was running down the highway at 75 with cruise set and the bike shut down.
I have checked the spark and have none checked the fuses all are good in the left hand panel.
Checked for voltage at the ignition control unit (6P-WHT) blk/wht and have none.
Checked the voltage at the ign/cruise relay and had voltage swapped relay with known good relay and still no voltage at ign control unit and no spark.
The clymer repair manual I have does not have the best wiring schematics so at the moment I am at a loss.
Are there any other fuses diodes or relays I should look at?
From past experience with the Honda dirt bikes I rode I am skeptical of the off on off switch but looking at the schematic I have if there is voltage at the relay the switch should be fine.
Any suggestions on where to find a good wiring schematic and any info on this problem would very appreciated.



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Uncle Fester
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Re: 1988 GL1500 shut down with no spark

Postby Uncle Fester » Thu Apr 03, 2014 9:03 pm

Not 100% sure, but I had the seat off my bike two days ago, and I THINK I saw two fuses right at the back edge of the fuel tank. They might have been fusible links too, I did not examine them closely.

I hope this helps.
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virgilmobile
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Re: 1988 GL1500 shut down with no spark

Postby virgilmobile » Thu Apr 03, 2014 9:13 pm

Power is also shut off by the bank angle sensor.it can be bypassed for testing and don't forget the kill switch...it's wires can be accessed at the handlebar

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ct1500
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Re: 1988 GL1500 shut down with no spark

Postby ct1500 » Thu Apr 03, 2014 9:22 pm

When you turn the key on with kill switch on does the fuel pump under seat do its 2 second priming run.

Does the cruise on light with button on illuminate when key is first turned on.
This is what I do
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BUCKY AKINS
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Re: 1988 GL1500 shut down with no spark

Postby BUCKY AKINS » Thu Apr 03, 2014 9:42 pm

Thanks for the suggestions I will check them all.
Also I am a mechanic with 22 years of experience on autos and heavy equipment so don't be scared to get technical with me.
Thanks for any and all suggestions.

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virgilmobile
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Re: 1988 GL1500 shut down with no spark

Postby virgilmobile » Fri Apr 04, 2014 7:11 am

You can also download the 89 euro manual.Its very close.

By the way ' I ain't scared' :D

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robb
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Re: 1988 GL1500 shut down with no spark

Postby robb » Fri Apr 04, 2014 8:22 am

The main 50 amp dog bone fuse is located under the seat. If it goes you won't.

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WingAdmin
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Re: 1988 GL1500 shut down with no spark

Postby WingAdmin » Fri Apr 04, 2014 12:25 pm

The bank angle sensor would be the first thing I would check.

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Uncle Fester
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Re: 1988 GL1500 shut down with no spark

Postby Uncle Fester » Fri Apr 04, 2014 8:51 pm

Just for my future knowledge, where does the bank angle sensor reside ?
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virgilmobile
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Re: 1988 GL1500 shut down with no spark

Postby virgilmobile » Fri Apr 04, 2014 9:11 pm

Remove the seat.its mounted to the frame on the right side just below the trunk.3 wires attached to it.

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Uncle Fester
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Re: 1988 GL1500 shut down with no spark

Postby Uncle Fester » Fri Apr 04, 2014 9:44 pm

Thanks, now ( if I ever need it) I know where it is. . .
Reputation is what other people know about you. Honor is what you know about yourself. Our stress about it happens when the two aren't the same. Be true to yourself and to hell with what everyone else thinks!

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virgilmobile
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Re: 1988 GL1500 shut down with no spark

Postby virgilmobile » Fri Apr 04, 2014 9:59 pm

Are you hinting that you fixed the bike?

Or was this just a test. :lol:

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ct1500
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Re: 1988 GL1500 shut down with no spark

Postby ct1500 » Fri Apr 04, 2014 11:36 pm

A faulty BAS will also kill start circuit and the OP checked for spark so it must crank over.
This is what I do
Local and need repair help with your 1500, Valkyrie or ST please PM

BUCKY AKINS
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Re: 1988 GL1500 shut down with no spark

Postby BUCKY AKINS » Thu Apr 10, 2014 7:07 am

Thanks for the responses. Sorry I haven't responded back but I haven't had the time to work on my bike until last night.
The engine spins over but have no fire at the spark plugs. I have worked my way through the trouble shooting guide in the repair manual I have and everything seems to be leading to a bad ignition control module(ECM). I have checked the harness at the ECM for voltage and continuity as described in my repair manual and all check good.
Hoping this afternoon to have time to pull timing belts drive pulley to make sure the pulse rotor is not damaged in any way.
If it winds up being the ECM is there anyone who offers a reconditioned one or maybe that repairs them?
Any other suggestions on things that might cause this problem?
Thanks again for y'all's advice.

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virgilmobile
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Re: 1988 GL1500 shut down with no spark

Postby virgilmobile » Thu Apr 10, 2014 7:21 am

There is a way to check the pulse coils without a visual inspection.
I have done this on a gl1200 and posted a video of it (search gl1200 pulse coil testing).The 1500 should be the same.There tested right at the ECM.
Actually,I've never heard of a bad ECM on a 88,and remember its different than other years.
Can you tell me what voltage you had on the black switched power wire feeding the ECM during cranking???
This is important.It needs to be above 10.2 volts during cranking and cranked for at least 2 revolutions before any spark will appear.
My88 has absolutely no spark if the battery falls below 9.8 volts while cranking.
The 1500 uses 2 pulse coils.As I guess,one is for spark and the other determines when to spark.
As always any corroded connections are suspect.especially the pulse coil ones.Very low volts there.

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virgilmobile
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Re: 1988 GL1500 shut down with no spark

Postby virgilmobile » Thu Apr 10, 2014 10:35 am

I also remember another point of interest.....
You are aware that if you put the bike in gear with the side stand down...it kills the ignition...
The kickstand switch is more than one set of contacts...There is a common ground..the other 2 wires ground as the side stand is raised or lowered.
Just another thing to verify....

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virgilmobile
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Re: 1988 GL1500 shut down with no spark

Postby virgilmobile » Thu Apr 10, 2014 10:48 am

While I'm thinking bout it,right below the ECM,attached to the harness is a common ground buss connection...It has several green wires in it and a shorting bar on the top....I have seen these corrode and melt....Here's a post bout it..http://www.goldwingfacts.com/forums/2-g ... emlin.html
I hope that when you measured the volts on the ECM that your meter ground lead was attached to the plug at the ECM and not the battery or frame....please say yes.... :geek:

A bad ground could kill the ignition and if you use the connection at the battery negative for your meter you can still show proper volts on the black wire....You just have a incomplete circuit...

That magic smoke has to be able to get back into the battery somehow.. :D

By the way...E-Bay has a few 1988 ECM's listed..

BUCKY AKINS
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Re: 1988 GL1500 shut down with no spark

Postby BUCKY AKINS » Tue Apr 29, 2014 11:07 am

Thanks to everyone for the suggestions.
I finally found the problem at the connector for the kill switch.
A broke wire that would lose connection from vibration of turning the engine over.
The ECM would have power until then. Thankfully I hadn't order an ECM but was fixing to.
Again thanks to everyone.

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virgilmobile
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83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: 1988 GL1500 shut down with no spark

Postby virgilmobile » Tue Apr 29, 2014 12:21 pm

No pictures to document the event.???How could you.!!!
Where was the connector.???
I wanna check mine too. :D

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Mh434
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Re: 1988 GL1500 shut down with no spark

Postby Mh434 » Tue Apr 29, 2014 1:24 pm

Thank you for the update! While this could have occurred as a result of several theoretical issues, it's nice to hear about an actual case, with a solution.

If this happens to me, I will look to the kill switch wiring first!

Signdude
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Re: 1988 GL1500 shut down with no spark

Postby Signdude » Thu May 01, 2014 9:23 pm

I had the same problem. Had the bike towed home. Brought it to 3 bike shops. Turned out to be a loose connection at the kill switch. Just had to tighten two screws & I was riding again.




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