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-   -   Eliminating side stand switch … Diode (http://forums.sv650.org/showthread.php?t=103144)

Blue_SV650S 21-01-08 11:39 AM

Eliminating side stand switch … Diode
 
I think mine is giving me grief (randomly cutting engine when I am going along and/or cutting the engine when I put it in first at some lights). Looking at the wiring diagram, the wires that go to it are shorted when the stand is up. However I notice there is a diode in the stand switch (according to the diagram) so presumably if I simply chopped the wires and shorted out, there could be some back-feed though this circuit?!!??

Comments please!

On a curvy if it makes a difference!

Robw#70 21-01-08 02:49 PM

Re: Eliminating side stand switch … Diode
 
just join them together there's nothing that is effected, the diode is in the loom by the starter solenoid which i think is for the neutral light

yorkie_chris 21-01-08 06:47 PM

Re: Eliminating side stand switch … Diode
 
The diode, afaik is to stop any strange effects when you let go of the starter button, such as pulses and arcing on the starter solenoid contacts. (thats the one labelled as "clutch diode" in haynes, and lives up by the reg/rec)
Don't think it affects the neutral light, isn't connected to it directly at all.

Blue_SV650S 21-01-08 08:25 PM

Re: Eliminating side stand switch … Diode
 
it deffo shows a diode in the sidestand switch itself!!

http://www.sv650.org/SV_service_manu...02-wiring2.JPG

Anyhoo, I have chopped and 'made' the wires now ... we will soon see if it was the switch at fault .. pinkies crossed :)

Sid Squid 21-01-08 11:05 PM

Re: Eliminating side stand switch ? Diode
 
Blue's right, the diode is to stop 'backfeeding' as the neutral and sidestand switches feed into the starter control relay, (not the solenoid, the relay that controls it).

Blue_SV650S 22-01-08 10:29 AM

Re: Eliminating side stand switch … Diode
 
Well what was an intermittent fault turned into a permanent fault this AM ... although the 'twist and tape' seemed ok last nigh/got me home without fault (was cutting out at least 3 times a ride before),. she was having none of it this AM :( and just cut out every time I tried to put it in gear ...

I was 'roadside' so tried to fix with what I had to hand ... long story short, it was not the sidestand switch itself, but the green feed wires themselves (finally bodged it by jamming the black/white wire that fed the sidestand switch into the green wire in the fuzebox/relay).

It's a bit of a mess at the mo as it was a roadside repair, ... sort it out properly at a future date (narrow down further where the break in the circuit is, replace that bit of wire and re-wire the sidestand in). But I am pretty sure there was a dodgy feed wire to the sidestand switch ...

Blue_SV650S 22-01-08 10:29 AM

Re: Eliminating side stand switch ? Diode
 
Quote:

Originally Posted by Sid Squid (Post 1393304)
Blue's right, the diode is to stop 'backfeeding' as the neutral and sidestand switches feed into the starter control relay, (not the solenoid, the relay that controls it).

Can you think of negative effects? it seems to work ...

yorkie_chris 22-01-08 12:58 PM

Re: Eliminating side stand switch … Diode
 
I'd eliminate the lot, but if you want a spare sidestand switch then I've got one kicking about.

Blue_SV650S 22-01-08 02:43 PM

Re: Eliminating side stand switch ? Diode
 
Quote:

Originally Posted by yorkie_chris (Post 1393687)
I'd eliminate the lot, but if you want a spare sidestand switch then I've got one kicking about.

Cheers 4 the offer, but I don?t think there is anything wrong with mine in the end!! ? with a bit of daylight and a multimeter I traced the fault to a factory crimp joint in the green wire (goes from blue to green?!!?) just below the fuse/relay holder ?

Now I have fixed the failure in the circuit, I?ll take the sidestand off and re-solder/make the wires I chopped off.

Although the sidestand switch is a pain as it is a point of failure, it IS a good idea, so I?d like it back in the circuit if it is OK 8)

Blue_SV650S 22-01-08 02:47 PM

Re: Eliminating side stand switch … Diode
 
Oh and I DID break the relay :oops: … I shorted out the Green and the Orange/Yella wire during my trace procedure … unfortunately the bike then wouldn’t start!! :oops: … I had one from my track bike, so threw that in and we were back again.

So I either need a new relay thingy for my track bike, OR, looking at the diagram, I could short the O/Y and the O/B internally and that should essentially bypass the safety relay right?

(I’ll have a run through the diagram to make sure, but be interested in what others thought).

Sid Squid 22-01-08 10:19 PM

Re: Eliminating side stand switch ? Diode
 
Quote:

Originally Posted by Blue_SV650S (Post 1393515)
Can you think of negative effects? it seems to work ...

Ummmmm... Not immediately, no. It will matter what and where in the system were shorted of course, at the switch end obviously it will allow the bike to ridden with the stand down, as the circuit will be as if the switch were in the 'up' position all the time. If it were shorted on the other side of the various bits of control then it might be possible, for instance, for the bike to be started in gear, (or whatever), as the starter inhibit would be bypassed.

Of course all of these 'problems' will be obviated by the addition of sense. Which is what was used when we didn't have endless bits of nannying guff making us 'safe' from riding off with the stand down etc, if we were daft enough to forget it.

Is this 'dumbed down' motorcycling I wonder?

yorkie_chris 23-01-08 07:19 PM

Re: Eliminating side stand switch ? Diode
 
Quote:

Originally Posted by Sid Squid (Post 1394271)
Is this 'dumbed down' motorcycling I wonder?

Yup, to steal northwinds term it's just clever enough to be stupid.

philbut 27-05-08 06:46 PM

Re: Eliminating side stand switch … Diode
 
Just had exactly the same problem as Blue...Performed a wonderful rear end slide entering a roundabout this evening on the way to the TV meet. Swaped the side stand switch to no avail...Off to wiggle some wires under the seat! I'm guessing its a loose connedtion at the side stand relay.

Warthog 28-05-08 11:44 AM

Re: Eliminating side stand switch … Diode
 
Hope you get it sorted, I had to ride behind Philbut with my hazards on to get him home as his engine would invariably stop when in gear and going round a roundabout causing all sorts of merriment! The joys of a "safety" device.

philbut 28-05-08 11:47 AM

Re: Eliminating side stand switch … Diode
 
Cheers for that mate. Didn't really want to sit on the drive with it running last night so i'll try it out today and wiggle stuff with it in gear and clutch clamped in (on the padock stand incase it tries to run away!)


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