GL1200 Aspencade digital display acting up


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seanrussell
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Joined: Wed Nov 13, 2013 2:44 am
Location: Salem, Oregon
Motorcycle: 1986 GL1200 Aspencade

GL1200 Aspencade digital display acting up

Postby seanrussell » Wed Nov 13, 2013 4:46 pm



Hi all - long time reader, first time poster. My name is Sean and I'm rebuilding an 86 GL1200 Aspencade. There have been some ups and downs, but I'm pretty close to being done and getting on the road except for one thing: my digital display has gone all wonky (picture below). I was test driving at low speeds and at some point my display went completely haywire - it shows all the digits, letters, words, everything. It shows up like that and then starts to fade out in sections after a few seconds. I should mention the previous owner had a LOT of extra wiring on the bike which I've been eliminating along the way, but that didn't seem to matter at first. Now there's a relay on the top right side under the main cover which keeps heating up and cooking itself too.
I've checked and looked and I just can't seem to find anything to be causing these problems.
If anybody has any suggestions I would sure welcome them!
Thanks
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virgilmobile
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Re: GL1200 Aspencade digital display acting up

Postby virgilmobile » Wed Nov 13, 2013 7:46 pm

bad ground.
Its my first suspect.
with a botched wiring you may need to supliment the power,switched power and ground for beter stability.
often the culpret is the faring plug.Left inside below the pocket

seanrussell
Posts: 4
Joined: Wed Nov 13, 2013 2:44 am
Location: Salem, Oregon
Motorcycle: 1986 GL1200 Aspencade

Re: GL1200 Aspencade digital display acting up

Postby seanrussell » Wed Nov 13, 2013 9:41 pm

Thanks - that'll be my first target!

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WingAdmin
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Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: GL1200 Aspencade digital display acting up

Postby WingAdmin » Wed Nov 13, 2013 11:00 pm

I hate to say it, but that is the appearance of a physically failed LCD panel. The only real "fix" is replacement.

seanrussell
Posts: 4
Joined: Wed Nov 13, 2013 2:44 am
Location: Salem, Oregon
Motorcycle: 1986 GL1200 Aspencade

Re: GL1200 Aspencade digital display acting up

Postby seanrussell » Thu Nov 14, 2013 3:01 am

That's what I'm afraid of.

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virgilmobile
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83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: GL1200 Aspencade digital display acting up

Postby virgilmobile » Thu Nov 14, 2013 8:06 am

Before you replace it,verify please.The whole cluster can be powered up with just 3 wires attached.
Steady 12 volts,switched 12 volts and ground.Ive done it.
Only the if it fails the basic power on test would I replace it.
I can get you the color codes if you need.
It's tested completly unhooked from the bike.

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virgilmobile
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78 GL1000
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83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: GL1200 Aspencade digital display acting up

Postby virgilmobile » Thu Nov 14, 2013 9:17 am

To verify,connect red and black/brown to 12 volts positive..connect green/black stripe to ground...
Unplug everything else....
As soon as power is applied,the display should self test(full character display) for about 3 seconds then revert to a no input display....watch the spedo....it should show 0 mph for as long as it has power...

seanrussell
Posts: 4
Joined: Wed Nov 13, 2013 2:44 am
Location: Salem, Oregon
Motorcycle: 1986 GL1200 Aspencade

Re: GL1200 Aspencade digital display acting up

Postby seanrussell » Thu Nov 14, 2013 7:12 pm

Thanks man - that really helps. I'm going to give that test a try and I'll post the results. Thank you!

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WingAdmin
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Posts: 17050
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: GL1200 Aspencade digital display acting up

Postby WingAdmin » Fri Nov 15, 2013 1:45 pm

virgilmobile wrote:To verify,connect red and black/brown to 12 volts positive..connect green/black stripe to ground...
Unplug everything else....
As soon as power is applied,the display should self test(full character display) for about 3 seconds then revert to a no input display....watch the spedo....it should show 0 mph for as long as it has power...


Unfortunately, LCD segments normally work 100%, or they don't. You can't get them to partially work, so only a portion of the segment shows. That's what his display is doing, and the only thing that can cause that is physical failure of the display itself.

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virgilmobile
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83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: GL1200 Aspencade digital display acting up

Postby virgilmobile » Fri Nov 15, 2013 4:24 pm

Very possible.
weird things can happen when you loose a ground and the computer finds a new one elsewhere.
we can hope and testing will decide.

5str48
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Location: Reno, NV 89512
Motorcycle: 1986 GL1200A Aspencade

Re: GL1200 Aspencade digital display acting up

Postby 5str48 » Thu Jul 07, 2016 3:11 pm

Same thing happened to me a while back. I found a used unit (broken casing, but LCD part okay) on e-bay and popped it in the original housing. Worked perfectly since.




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