Anyone have a GS1100E wiring diagram?

[Sojourner]

- Put the heat-shrink on FIRST

You'd be alarmed by the number of times that's happened. I haven't even bought the heat shrink tubing yet and I've already started the mantra of "Step 1, slide on the heat shrink...."

Turns out I do have the spring BTW. It's flopped over and laying on top of the bit it attaches to behind the brake pedal. So does the spring just loop through the eye of the plunger on the switch? Maybe I'll get lucky and it'll all work! Not holding my breath though.

And for $10, I'll just order a whole new front brake switch. Does it include the screws too?

 

[cowboyup3371]

Mine didn't include the screws but for another $1 at Ace Hardware you'll be okay there.

 

[Sojourner]

Look at the parts fiche for your bike. In the "STAND" fiche, you will see the brake pedal. The inner part of that is item #13. The tab to which the spring attaches is directly over the 13 and rather hard to see. It is NOT the tab going to the rear where pin #17 goes through. Now look at the "WIRING HARNESS" fiche, the spring is #19.
.

I don't have the spring after all. I have the #16 spring from stand fiche, and best I can tell it's hooked up as it should be. What I appear to be missing is the longer #19 spring that attaches to the #18 brake switch in the wiring harness fiche.

Can anyone take a pic or three and diagram where this spring is supposed to attach? I got one end goes into the switch, but where does the other end go?

Oh, and BTW, of course my battery was near dead this morning. I guess I need to double-check everything that we did for the Compufire and Rick's stator install. Battery finally gave up the ghost maybe?

 

[Guest]

I couldn't find a wiring diagram in the service manual for the '80 GS1100ET but I did find one for the '81 GS1100EX, one year newer, believe to be basically the same bike. Page 13-23.
http://www.mtsac.edu/~cliff/storage/gs/80-83_GS1100T-LT-EX-1000SZ-EZ-SD-ED-ESD.pdf

Chapter 11 covers troubleshooting and checking the electrical system for the '80 GS1100ET.

I do believe I found a wiring diagram in the owners manual for the '80 GS1100ET, page 66. Believe it to be an '80 because the owners manual is dated Nov 1979.
http://www.mtsac.edu/~cliff/storage/gs/GS1100E_Owners_Manual.pdf

 

[Sojourner]

Ya, it's not really a wiring issue at this point. Well the front switch is wiring, but we know the root cause since on of the wires is obviously broken. The rear issue is the mechanical linkage that actuates the brake switch, namely the spring is missing, which pulls out the nipple on the switch to complete the circuit.

The spring is less than $3 from Power Sports Plus. The problem is that I have no idea what the other end of the spring hooks into. The brake switch nipple on the one end of the spring, but the other end goes where?

And the spring actually appear to be #12, not number #19 like I stated earlier. #19 is for a a side stand idiot light and my '80 doesn't have that. So I guess I'll be ordering #12 and a new front brake switch.

Fiche in question...
http://www.powersportsplus.com/parts/search/Suzuki/Motorcycle/1980/GS1100E/WIRING+HARNESS/parts.html

Anything else I'll need or need to check I have?

 

[Guest]

Ya, it's not really a wiring issue at this point. Well the front switch is wiring, but we know the root cause since on of the wires is obviously broken. The rear issue is the mechanical linkage that actuates the brake switch, namely the spring is missing, which pulls out the nipple on the switch to complete the circuit.

The spring is less than $3 from Power Sports Plus. The problem is that I have no idea what the other end of the spring hooks into. The brake switch nipple on the one end of the spring, but the other end goes where?

And the spring actually appear to be #12, not number #19 like I stated earlier. #19 is for a a side stand idiot light and my '80 doesn't have that. So I guess I'll be ordering #12 and a new front brake switch.

Fiche in question...
http://www.powersportsplus.com/parts/search/Suzuki/Motorcycle/1980/GS1100E/WIRING+HARNESS/parts.html

Anything else I'll need or need to check I have?

It goes to one of three holes in your rear brake pedal assy. The hole closest to the front has a heavy spring which returns the pedal back to position. The 2nd from front (or back for that matter) otherwise the middle hole is for that brake light spring, and the back hole from the front goes to the master cylinder linkage.
Those holes are in item 13 of this fische, (it doesn't show 'em).
http://www.boulevardsuzuki.com/fich...y=Motorcycles&make=SUZUKI&year=1980&fveh=2155

This pic which I took off E-bay clearly shows the holes, remember it's the "middle" hole. I tried to take a picture myself, batteries in camera are dead, I think my girlfriend likes to keep them that way :lol:

 

[Sojourner]

I think that's what's screwing me up. I'm going on memory here since I'm at work, but I believe the spring I do have is in the middle hole. The rear MC attaches via a pivot to the "3rd hole" (the one farthest back). There's the two holes forward of the pivot, and like I said, the short spring I do have is in one of those two. FWIW- The short, fat spring I have (~3") doesn't seem to be doing jack. Even with the pedal pulled it's not under tension. It appears that all of the return tension is provided by the rear MC.

SO- The back hole is the one used in the plunger/pivot to the rear MC. The front hole is the brake pedal return spring and is connected to a nipple on the frame. The middle hole should have the looooong spring in it, and the other end of the long spring goes to the nipple of the brakelight switch.

Sound right?

 

[Guest]

I think that's what's screwing me up. I'm going on memory here since I'm at work, but I believe the spring I do have is in the middle hole. The rear MC attaches via a pivot to the "3rd hole" (the one farthest back). There's the two holes forward of the pivot, and like I said, the short spring I do have is in one of those two. FWIW- The short, fat spring I have (~3") doesn't seem to be doing jack. Even with the pedal pulled it's not under tension. It appears that all of the return tension is provided by the rear MC.

SO- The back hole is the one used in the plunger/pivot to the rear MC. The front hole is the brake pedal return spring and is connected to a nipple on the frame. The middle hole should have the looooong spring in it, and the other end of the long spring goes to the nipple of the brakelight switch.

Sound right?

What? Huh? Oh yeah, You nailed it!
I just checked my spring, return pedal spring, hard to measure but it seems to be about 2 inches long "unsprung." But I have a '82 GS1100EZ, I looked up the spring and it has the same part number as yours. Less than $2. Item no 17 in the '82's part fiche below or item 16 in the fiche I previously gave you.
Now basically the fische for the '82 is much clearer and you can see those holes on it.
http://www.boulevardsuzuki.com/fich...y=Motorcycles&make=SUZUKI&year=1982&fveh=2156

 

[Guest]

I went back out and remeasured that spring, I said about 2" and it was indeed 2" or just shy of 2" from center of top of nipple on frame to bottom
of spring where it mates into hole. I have a fairly strong return back to the no brake position.
I do believe that can be adjusted somewhat by the bolt and lock nut which I believe to be items 21 & 22.
Also, item 13 is splined and that may not be in the proper position.
But if you have a 3" return spring I think that may be too long and I would think that is the problem.
http://www.boulevardsuzuki.com/fich...y=Motorcycles&make=SUZUKI&year=1982&fveh=2156