Can anyone tell me what ths electrical item is?

[lukemillar]

It is living in my Gas Gas fuse box (number 7) and has no continuity across it. Is it a fuse? has it blown?

Fuses 1-8
http://img216.imageshack.us/img216/7541/fuses.jpg (http://img216.imageshack.us/my.php?image=fuses.jpg)

Mystery Fuse Number 7 - no continuity:
http://img216.imageshack.us/img216/6681/unknownj.jpg (http://img216.imageshack.us/my.php?image=unknownj.jpg)

Thanks
Luke

[simesb]

Looks a bit like a diode - but other than that I cannot help!

[yorkie_chris]

Check the continuity with the tester tother way around.

P.s diodes have a threshold voltage so if your tester is below this to check continuity then it still won't show. Try a test light or something.

[cymroboi]

which model gasgas is it ????

[hovis]

which model gasgas is it ????

its not a trials bike

[Kilted Ginger]

Definately a diode, as YC rightly says, current flow in one direction only. depending on the multimeter you are using it may have a diode selector.

[injury_ian]

+1 on Diode, how strange.

if its a problem, try swaping it round 180degrees (as mentioned)

[xXBADGERXx]

Maybe a Blocking Diode that is meant to stop spikes getting through ?

[yorkie_chris]

SV has a diode to allow EMF spike in starter relay to get to earth when you release the button.

[Tim in Belgium]

Luke, it may be a diode ;)

[lukemillar]

Cool - thanks for all the replies :)

Assuming it is working - does anyone know how you would determine which way round it goes?

It's a Gas Gas enduro - EC-400

[lukemillar]

Luke, it may be a diode ;)

shut it! ;)

[thefallenangel]

would of thought it would be obviously marked otherwise IIRC one leg is longer than the other.

[yorkie_chris]

That's LED.

Diodes direction of current is marked by which end that white band it on. Question is which way is it wired for! It's diagram time...

[simesb]

would of thought it would be obviously marked otherwise IIRC one leg is longer than the other.

I think it is the white stripe - think the gate is in the direction of the end with the white stripe, but it's a long time since I did physics at school!

[thefallenangel]

HNC Electrical Priniciples lesson from an Electronics technican and i still cant remember it.

Nevermind, i'm more Red to Red, Blue to Blue and Yellow to Yellow than electronic crap.

And i was close seeing as an LED is a diode.

Find out what it's connected to and work out with the diode is used as a filter or to stop back EMF.

[lukemillar]

That's LED.

Diodes direction of current is marked by which end that white band it on. Question is which way is it wired for! It's diagram time...

@rse - I only have a wiring diagram for an 05 450! I think most of it is similar.......

[lukemillar]

Find out what it's connected to and work out with the diode is used as a filter or to stop back EMF.

I'm electrically retarded :smt045

Well, not completely, but I find mechanics way easier

[yorkie_chris]

If it is connected to the starter relay trigger wire then it is to stop back EMF.

[thefallenangel]

should be simple then. Follow the diagram find out which side is off the starter relay and connect up.

[gettin2dizzy]

Ah. That'll be your power band ;)

[lukemillar]

Ok, I have the wiring diagram on my laptop, but i can't uploaded it as I'm at work. Looking at the fuse numbering in the diagram, my fuse box seems to be different to the 05 450.

Anyway - I'll have a better look at the actual box tonight and see what is physically connected to that diode rather that work off a diagram that may or may not be correct.

Cheers for the help guys :cool:

[injury_ian]

Nevermind, i'm more Red to Red, Blue to Blue and Yellow to Yellow than electronic crap.

OR Brown to Brown, Black to Black and Grey to Grey as it is now.....

[gettin2dizzy]

OR Brown to Brown, Black to Black and Grey to Grey as it should be now.....
fixed ;)
As anyone sensible would do!

[lukemillar]

Ok, found it on the circuit diagram. It is a diode (as you all knew) and sits between the ECU and the solenoid.

Diode is represented by a triangle with a line at the point. Just so I don't make assumptions, does that indicate the direction of the current? If so, does the white line on the actual diode also relate to the line in the diagram i.e current won't flow that way and therefore which way it needs to be orientated?

I know this may seem really obvious especially when I look at the box tonight, but just wanna double check and learn something :)

[gettin2dizzy]

Ok, found it on the circuit diagram. It is a diode (as you all knew) and sits between the ECU and the solenoid.

Diode is represented by a triangle with a line at the point. Just so I don't make assumptions, does that indicate the direction of the current? If so, does the white line on the actual diode also relate to the line in the diagram i.e current won't flow that way and therefore which way it needs to be orientated?

I know this may seem really obvious especially when I look at the box tonight, but just wanna double check and learn something :)
Yup! Convention does occasionally work ;)

[lukemillar]

Definately a diode, as YC rightly says, current flow in one direction only. depending on the multimeter you are using it may have a diode selector.

Pint for Kilted Ginger - Multimeter does have a diode setting adn I get a reading

If it is connected to the starter relay trigger wire then it is to stop back EMF.

2 Pints for YC for correctly identifying the part and what it does.

Yup! Convention does occasionally work ;)

1/2 shandy for G2D for parachuting in at the end for a free frag ;)

Cheers for all you help guys (Everyone who posted)

[gettin2dizzy]

1/2 shandy for G2D for parachuting in at the end for a free frag ;)

:smt044

[SoulKiss]

Ok, found it on the circuit diagram. It is a diode (as you all knew) and sits between the ECU and the solenoid.

Diode is represented by a triangle with a line at the point. Just so I don't make assumptions, does that indicate the direction of the current? If so, does the white line on the actual diode also relate to the line in the diagram i.e current won't flow that way and therefore which way it needs to be orientated?

I know this may seem really obvious especially when I look at the box tonight, but just wanna double check and learn something :)

Well the pic you posted - was the bike working then - if so then put back as was :)

Is you put it in the wrong way round you wont break anything BTW - so Trial and Error is valid :)

[yorkie_chris]

Yes you can damage things putting them in backwards. That's why SV one only fits in the holder one way!

[gettin2dizzy]

You most certainly can damage it! You won't damage it by solely putting it in ... until you start the engine ;) ZzZzZzap!

I'll give my shandy back, and take a lemonade... I've had Kiwi beer :lol:

[yorkie_chris]

You most certainly can damage it! You won't damage it by solely putting it in ... until you start the engine ;) ZzZzZzap!

I'll give my shandy back, and take a lemonade... I've had Kiwi beer :lol:

Why what's it like? 6 pints and still legal to drive? :-P

[gettin2dizzy]

Why what's it like? 6 pints and still legal to drive? :-PSay the word 'ale' over there and you get thrown out ;)

[SoulKiss]

Yes you can damage things putting them in backwards. That's why SV one only fits in the holder one way!

I stand HUGELY corrected !!!

I would have thought that a Diode the wrong way would just cause to circuit to be incomplete, so nothing would happen .

[gettin2dizzy]

I stand HUGELY corrected !!!

I would have thought that a Diode the wrong way would just cause to circuit to be incomplete, so nothing would happen .It doesn't damage the diode, it damages the bikes electrics. The diode is like an 'overflow' directing the current away (AFAIK)

[yorkie_chris]

Yup pretty much, but with it the wrong way it'll act as a dead short and fry something. IIRC from the SV's wiring diagram.

[gettin2dizzy]

Your starter motor would burn out pretty damn quickly otherwise!

[yorkie_chris]

Nah starter motor is fine, it's to dump the built up charge in the starter relay.

With a magnetic coil you're building up a store of energy in the exact same way as in an ignition coil, so when you switch that off.. ZAP.

[gettin2dizzy]

Nah starter motor is fine, it's to dump the built up charge in the starter relay.

With a magnetic coil you're building up a store of energy in the exact same way as in an ignition coil, so when you switch that off.. ZAP.


But without allowing the back emf surely you'd be overloading the starter motor by allowing it to draw huge current?

Mechanics- I like. Electrics I can pass on!

Edit: all that above is wrong, but I do hate electrics ;)

[yorkie_chris]

The diode is not connected to the starter motor at all. It's to prevent a surge as the coil* discharges it's magnetic field.

The back EMF is an internal thing in the motor.

Edit *the coil in the starter relay

[gettin2dizzy]

Ah I'm being a dumbass! Yeah, the back emf as you get off the starter button, or otherwise nicely fried circuitry all round :)

[yorkie_chris]

Well not instantly, I've been running mine without a diode for months out of curiosity and nothings on fire yet...

[gettin2dizzy]

It wouldn't surprise me if there was a resistor in there to suppress it a little too. Never looked at the SV wiring diagrams to tell though.

[yorkie_chris]

If there is, it is integral to relay.

[gettin2dizzy]

I'd imagine it'd have it across the relay coil anyway, and I presume the diode is in parallel with the motor.

[yorkie_chris]

Nope it's between relay trigger and earth. I reckon because the starter motor itself is fully disconnected as soon as the button is released, and is already earthed itself it needs no other help? Though TBH I'm not at all sure.

[Rorshach]

Well not instantly, I've been running mine without a diode for months out of curiosity and nothings on fire yet...


now thats just tempting fate.

[yorkie_chris]

Nah, curiosity.

[xXBADGERXx]

He`s fibbing , what he really meant to say is "I took it out , lost it , couldn`t be bothered to order a new one , shrugged , put the lid back on the Fuse Box and went for a ride" :p

[yorkie_chris]

No. I rewired whole bike, thought "wtf's this for" looked at book, went "oh yeah", looked at connector and thought "f##k ordering one of those".

THEN I shut lid of fusebox, shrugged, and went for a ride*!


*may not be entirely accurate, sure I rolled a cig and had a cuppa tea somewhere along this timescale too.

[xXBADGERXx]

Biscuits too ?

[Rorshach]

sure I rolled a cig and had a cuppa tea somewhere


and thats the best way to be fella