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Suzuki GS500 electrical issue

Started by BillMahn, November 13, 2020, 04:49:34 PM

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BillMahn

Bike wouldn't start so I tried hot wiring it and it started fine. How do I fix this so I don't have to hot wire it anymore?

Sporty

Quote from: BillMahn on November 13, 2020, 04:49:34 PM
Bike wouldn't start so I tried hot wiring it and it started fine. How do I fix this so I don't have to hot wire it anymore?

"Hot wire" can mean different things to different people.

Before we can help, you need to describe what you did to "hot wire"?   
Used Suzuki GS500 = motorcycle adventure without leaving the shop.

Current motorcycles: 1993 GS500E, 1996 XL1200, 1999 ST1100

BillMahn

Connected a wire between positive on the starter motor and the positive on the battery

Sporty

#3
Quote from: BillMahn on November 13, 2020, 05:39:27 PM
Connected a wire between positive on the starter motor and the positive on the battery

Troubleshoot the starter relay and circuit.

Portions of my build thread should help you. In this case it was the clutch switch, but any break in the circuit will cause it not to crank from the starter button.

The starter relay circuit is highlighted.

You can test the relay itself by jumping battery positive (B+) to the yellow/green wire on the starter relay. 

Quote from: Sporty on September 30, 2020, 04:22:01 PM
The no start /no crank issue diagnosed.



From the wiring diagram, the yellow/green wires loop through the switches to the starter relay.
The bike had started fine from the button when brought home. The headlight bucket was a rats nest of wiring and rusty.
The bucket was removed and painted, the wiring reconnected and neatened up. It was apart for near two months, I didn't exactly remember if wires were not connected, or if the clutch had to be pulled to start.

(I had it connected per the wiring diagram, with all the yellow/green wires connected.)

The clutch switch is open... never makes contact. Those wires are circled in blue.
Connecting the wires circled in red (as shown in this photo) bypasses the clutch switch and allows the bike to crank from the start switch.
It must of been connected  like this before.




Unscrewing the switch from the clutch lever perch reveals two contacts.




Inside the perch is also this slider with a piece of copper to make the connection.




The plastic nub that engages the clutch lever is broken so it never slides to make the connection.





For an experienced rider, id probably leave it bypassed. For a new rider, it might save a mishap, so it's time to spend some money :laugh: :laugh: :laugh:.


Used Suzuki GS500 = motorcycle adventure without leaving the shop.

Current motorcycles: 1993 GS500E, 1996 XL1200, 1999 ST1100

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