Indicator Control Unit

[Guest]

Is this the auto-cancel device for the turn signals? All my lights function correctly, except the flashers on the turn signals. They were finicky to begin with, but they've stopped working altogether now. Tested the wires from the hand control and they function all the way to that little black box. Is there a way to test this?

I suspect the the flash relay could be the problem as well, but they don't even begin the blink. (bulbs and running lights work) Can I bypass this device, or at least test it to see if its the problem?

[blowerbike]

where are you from mystery man?
if you was close to me you could stop by and pug one of my boxes in and see if that fixes the problem.
(given its one that i have)

[mrl1000l]

AHH, just figured out how to add my location. I'm in Brooklyn.

[SqDancerLynn1]

what year is the bike?

[mrl1000l]

1979 gs 1000 l

[BassCliff]

Greetings and Salutations!!

Hi Mr. mrl1000l,

Have a look at this article and see if it helps at all:

Turn Signal Relay Replacement

Now let's get on with your "mega-welcome"...


I just stopped by to welcome you to the forum in my own, special way.

If there's anything you'd like to know about the Suzuki GS model bikes, and most others actually, you've come to the right place. There's a lot of knowledge and experience here in the community. Come on in and let me say "HOoooowwwDY!"....

Here is your very own magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", the Carb Rebuild Series, and the Stator Papers. Now let me roll out the welcome mat for you...

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Thank you for your indulgence,

BassCliff

[mrl1000l]

AMAZING! Thanks for welcome mat! I checked out your article (and the rest of your PDF site, VM carb rebuild YES!!!) I wished that pertained to my problem, but I think my issue is pre-flasher relay. The switch from the hand control goes first into a black box, which the Haynes Manual refers to at the Indicator Control Unit. Its Black/Blue wire and Light Green/Black wire on the way in. That control sends a request to the flash relay, which is returned to the ICU (not insane clown posse). Then the signal is passed back to the flashers, via Black wire and Light Green wire. I tested the relay, and signal is passed through it, so I'm assuming that if I were to hit the flasher they'd at least light up, without blinking, but they aren't even beginning the cycle. They don't light up at all, so I blame the ICU, mostly because I'm unsure on how to test it. Any thoughts? I'll take a picture of the nasty thing and post it. Maybe that will help.

[blowerbike]

i have 2 of the boxes your talking about.
if yours turns out to be bad.. send me a P/M if your interested in one.

[SqDancerLynn1]

78 & 79 models had their own module. Later modules are different. Hard to find a good replacement. Best bet is to convert to a manual system

[blowerbike]

i sold bruce one.
i have 2 left.

[galaskog]

Indicator Control Unit Sometimes

I restarted this thread as I have a strange problem with the ICU.

Indicator to the left is all right.
Indicator to the right is not OK, the ICU is not working until aprox 30 minutes of ride.

Hadlebar switch is OK, checked with close the wires directly.
Relay is Ok, as to the left works with no mistake.
All buls and fuses are OK.
I rechanged the batery, to see if it has any coleration with low power, but not.
Engine start, high rev, not works.
But after longer ride from one point it is in operation every time.

Does anyone has similar experience? Need ICU change or can repair?
Thanks:
Greg
81' GS1000 L

[mrl1000l]

I'm actually having the exact same problem with mine after getting a replacement on here that worked fine for over a year. My guess is it has to do with the auto canceling function in the box, and I've resigned myself to do the mod that was suggested earlier in the thread. Ultimately building a new wiring harness that eliminate this box and includes a coil relay mod. My advice is to forego the headache and just route the turn signals out of the ICU.

[galaskog]

Thanks. Actually my ICU has no auto cancelling function. But what is wierd, that one direction is ok and the other is not allways ok.

If I bypass the ICU than I need to connect the 2 wire harness to something "new ICU" do I?

[OldVet66]

Pull the distance counter out of the circuit. The connectors from the Speedometer to the black box are in the headlight. The electrical diagram for the GS1000 is on Basscliff's Website, and shows color codes and connector locations. It can cause your symptoms. The connector to the flasher also goes bad and makes poor contact. Mine stopped working. I jammed it up in between the frame to get it out of my way, while I was trying to figure it out, and it started to work again. I still need to replace the connector. Where I stuffed it just put the right pressure on the connector wires to make better contact. The plug is still bad.