Another Ignition Switch Question - GT500 (1976)

[Tailchaser1960]

Hi, I've just acquired a 1976 GT500 (A?) and it has some electrical issues (more of that in later posts after searching) but the 1st one concerns the ignition switch which looks to be a pattern part. The switch has 4 wires (Red, Orange, Grey & Brown). Looking at the wiring diagram(s) am I correct in thinking that in Pos 1 (On) the Red & Orange should be connected and the Grey & Brown should be open circuit and in the off position the Red & Orange are O/C and the Grey & Brown are connected?

The switch that is on the bike had both Red & Orange and Grey and Brown connected in the On position (both are O/C in the off position).

Cheers,

Jeff

[jabcb]

That's correct.
Red is hot from the battery. Orange is power for the bike.

The GT500 has a PEI ignition. It's a pointless magneto CDI ignition. Self powered & doesn't connect to the battery.
The other two switch wires ground out the ignition system so the bike doesn't run.

The right handlebar on/off switch also grounds out the ignition.

[Tailchaser1960]

So, when the switch is in the ON position the Grey & Brown wires should not be connected as this would ground out the ignition circuit?

If this is the case then I think I need a new switch.

Cheers,

Jeff

[jabcb]

Correct.

Looks like you have an ignition switch for a T500. An easy mistake by whoever did it.

[karl pa]

The GT500 ignition switch is model specific in the GT line. All other GT models have the incorrect contacts.
The Suzuki X7 may use similar.

[Tailchaser1960]

Looking at the pattern switches that are for sale on-line, I see that some of the GT500 ones have a single 4 way block connector and some have the 4 way and an additional 2 wires with bullet connectors.

My wiring diagram only shows 4 wires coming from the ignition switch so I'm guessing that the 6 wire one is a regional variation?

Cheers,

Jeff

[jabcb]

GT550 has a 6 wired ignition switch.

[Tailchaser1960]

Yes, I know the GT550 has a 6 wire switch but my question is about a GT500


Does anyone know where to get a proper 4 wire GT500 ignition switch from that doesn't short the Black/Yellow and Blank/White wires in the ON position. I've bought (and returned) 2 from ebay as they both shorted these wires in that position.

[jabcb]

Looks like the GT500 ignition switch is currently available from Suzuki in the US. One of the dealers I use lists it as in stock.

Am in the US & don’t know which UK Suzuki dealers have online parts ordering.

Looks like CMSL in the Netherlands has it.
https://www.cmsnl.com/suzuki-gt500-1976 ... 711025319/

[Tailchaser1960]

Thanks to all; managed to get a new switch (along with a few other bits) from Webike in Japan.