96 gl1500 no spark


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Bubba919
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1996 honda gl1500a

96 gl1500 no spark

Post by Bubba919 » Mon Oct 07, 2019 12:13 pm



So, i have a 1996 gl1500a in the shop, binge has been sitting since 2013, I've fixed alot of things such as the clutch, rear master cylinder, rebuilt the carbs, done a complete service, just replaced the coils and wires, the bike will turn over beautifully, but i have no spark, there is battery voltage at all 3 coils, and i ohmed out the pulse generators, checked the kill switch, side stand switch, bank angle, clutch switch, everything is working properly, battery has 12.7v and only drops to 10.7 while turning engine. I need help!! What direction should i go in? Ecu? Any help is greatly appreciated!!



Earl43P
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Re: 96 gl1500 no spark

Post by Earl43P » Mon Oct 07, 2019 12:34 pm

Welcome!

My 93 sometimes sits for months on end.
Upon reawakening, I recharge the battery overnight, apply full choke and crank the starter over for several 4-6 second turn-overs. This is to get fuel flowing and fill the bowls. I do not expect it to start. Then I walk away and either recharge the battery for a few hours or hook up jumper cables to my NOT-RUNNING truck battery. If it's summer, I move the choke to about 1/2, there is a detent.

Lastly, I press and release the starter button for ~1-2 second bursts. Typically, at the end of a starter burst (button released) it'll sputter and start. I then adjust the choke, keeping the rpms around 2200 as it warms up.

The key here is that it usually starts up AFTER releasing the starter button (allowing the battery to provide full voltage to the coils while the engine is still rotating at starter speed). I don't think 10.7 volts is enough to crank the starter AND power the coils, resulting in your "no spark" (which is no surprise to me).
When all else fails, RTFM!

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Erdeniz Umman
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Re: 96 gl1500 no spark

Post by Erdeniz Umman » Mon Oct 07, 2019 1:36 pm

How did you decide there is no spark?

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Erdeniz Umman
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Re: 96 gl1500 no spark

Post by Erdeniz Umman » Mon Oct 07, 2019 1:53 pm

Earl43P wrote:
Mon Oct 07, 2019 12:34 pm
.... I move the choke to about 1/2, there is a detent...
Sorry but, the correct usage of the choke according to the owner's manual is shown below.

And for "the starts up AFTER releasing the starter button" syndrome you can make a modification described in the following link.
https://www.goldwingfacts.com/forums/2- ... olved.html
Attachments





Bubba919
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Joined: Mon Oct 07, 2019 12:03 pm
Location: Apex, NC USA
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1998 harley road king
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1999 honda 400e
1985 harley xlh1000
1996 honda gl1500a

Re: 96 gl1500 no spark

Post by Bubba919 » Mon Oct 07, 2019 2:12 pm

I pulled the cap off the plug, and grounded a spare plug to the engine, I've also checked for power between the cap and ground while turning the engine over. And there's nothing, i have battery voltage at all 6 coil connectors when the key is on, i also took all the plugs out so the engine would spin free to reduce the load on the battery while cranking, still no spark from any plug.

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Erdeniz Umman
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Re: 96 gl1500 no spark

Post by Erdeniz Umman » Mon Oct 07, 2019 3:13 pm

Have you done something related with the pulse generators?
There was an issue in which the PG connectors were found to be swapped.

Also remove, check and reinstall the ECU connector. Because the real connector is inside the black connector, and it is sometimes found to be loose or disconnected.

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ct1500
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Re: 96 gl1500 no spark

Post by ct1500 » Mon Oct 07, 2019 4:20 pm

Am I correct in assuming it must have been running at some point in your possession to know the clutch and carbs were bad and doing this work before knowing if the engine ran? How much of this bike has been taken apart?
Last edited by ct1500 on Mon Oct 07, 2019 4:33 pm, edited 3 times in total.
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bellboy40
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Re: 96 gl1500 no spark

Post by bellboy40 » Mon Oct 07, 2019 4:25 pm

Here are some tests from the Honda service manual for a no start condition.

Tests at ECM connector
Tests at ECM connector


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WingAdmin
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Re: 96 gl1500 no spark

Post by WingAdmin » Mon Oct 07, 2019 4:50 pm

Erdeniz Umman wrote:
Mon Oct 07, 2019 1:53 pm
And for "the starts up AFTER releasing the starter button" syndrome you can make a modification described in the following link.
https://www.goldwingfacts.com/forums/2- ... olved.html
That's just hiding the symptom of the problem, instead of actually fixing the source of the problem.

Put a fresh AGM battery in the bike, and this problem goes away.

Bubba919
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1999 honda 400e
1985 harley xlh1000
1996 honda gl1500a

Re: 96 gl1500 no spark

Post by Bubba919 » Mon Oct 07, 2019 4:53 pm

It passed all the tests in the manual, everything tested good, the plastics are off the front now, and the trunk and bags were taken off, but are all reinstalled now, i have gone over all the connectors several times to massage sure they are connected i don't have all the fuel lines hooked up right now, the bike has not ran since ive had it, i made sure the engine wasnt locked up and started working on the brakes and stuff, i also replaced the fuel tank

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ct1500
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Re: 96 gl1500 no spark

Post by ct1500 » Mon Oct 07, 2019 5:07 pm

Erdeniz Umman wrote:
Mon Oct 07, 2019 3:13 pm
Also remove, check and reinstall the ECU connector. Because the real connector is inside the black connector, and it is sometimes found to be loose or disconnected.
I 2nd this check. ;)
Local and need repair help with your 1500, Valkyrie or ST please click contact
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Erdeniz Umman
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Re: 96 gl1500 no spark

Post by Erdeniz Umman » Mon Oct 07, 2019 11:44 pm

WingAdmin wrote:
Mon Oct 07, 2019 4:50 pm
Erdeniz Umman wrote:
Mon Oct 07, 2019 1:53 pm
And for "the starts up AFTER releasing the starter button" syndrome you can make a modification described in the following link.
https://www.goldwingfacts.com/forums/2- ... olved.html
That's just hiding the symptom of the problem, instead of actually fixing the source of the problem.

Put a fresh AGM battery in the bike, and this problem goes away.
WingAdmin I agree it will hide the real problem. The real cause may be a loose or corroded contact, pin, switch etc. or maybe the wire harness getting older and loosing its diameter, and so on.

So, this modification will decrease the load demand on the ignition circuit and help the components on the circuit, at least will not damage anything.

Before this modification I had experienced a no start issue although the engine cranked fine.

Just after this modification, I could start the bike even at a very low battery voltage that the bike barely cranks. And I have been still using the Lead Acid battery for 3 years without any problems.

Bubba919
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Joined: Mon Oct 07, 2019 12:03 pm
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Motorcycle: 1981 yamaha xa650
1998 harley road king
1984 honda xr500
2008 Suzuki drz125l
1999 honda 400e
1985 harley xlh1000
1996 honda gl1500a

Re: 96 gl1500 no spark

Post by Bubba919 » Tue Oct 08, 2019 6:22 pm

So, i double checked the connection at the ecm and its in all the way, still nothing

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virgilmobile
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Re: 96 gl1500 no spark

Post by virgilmobile » Tue Oct 08, 2019 7:39 pm

I'll put this check list out there.
Access the listed color coded wires in the following schematics.
Directly at the ecm.
Do not disconnect the ecm.

Turn on the key and kill switch to run.
Do not crank the bike..just measure the volts.
You want to measure the volts as the bikes system is under operating load.

Using a digital volt meter,measure voltage at each indicated wire.
Use the battery negative post for your meter ground for these checks.
Probe directly into the wire please.
Don't forget to probe the green ground wire...it must be zero volts.
And yes..the pulse coils will have a very low voltage..as I recall it is nearly 0.25 volts...
Please don't miss any measurement.Each one is necessary to make spark.













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