Ignition circuit drops off for a fraction of a second

[Tripodtiger]

Mine is an '02 955.   I had it out for a few hundred km last weekend and it's developed a momentary failure in the ignition.

To the extent that it has happened, it occurs for a short period after I start the bike.
Not 100% sure, but I think it happens irrespective of in gear or neutral, idle or on the throttle.

Typically, as I move off the ignition will just stop for anything from about 1/10th second to maybe 1/2 second.  Then it will resume.  It may do this a couple of times, it may do it for a kilometre or two.
The engine stops, ECU and temp lights come on - not the oil pressure light - and the tacho and speedo needles both fall.  I've not been quick enough to see if the odometer goes out or not.

I may then ride for a full tank of fuel and it wont do it again.  Until after I stop, get off, let it cool a bit and start it up again.

I found that the positive terminal was fractionally loose and re-tightened both terminals.  The problem did not happen until after our next stop, where it simply died, didn't want to re-start, let go a big backfire and then started and ran.

I am fully anticipating finding a loose connection when I get into it.  I will be applying some dielectric grease as I go but,

does this ring any bells for some other potential issue that has been noted before?

[Chris Canning]

It could be absolutely anything but there's a thread on here about me having trouble with mine which sounded very similar and it was the relay under the seat on the right hand side of the frame in the rubber grommet.

Go to World Of Triumph and look at the fiche it's number 30.

[Timbox2]

As above from Chris, but also check condition of main fuse and holder on side of battery, Green wire going to bottom of ignition switch, and maybe pull the main ECU connectors and have a look at them although in your climate that ones probably unlikely.

[Tripodtiger]

Thankyou 
Not got to it yet, been working on the other things in the garage.  Maybe this afternoon.  Fingers crossed.  I can see lots of disassembly again.

[Tripodtiger]

I've checked the fuse beside the battery, it's fine.
The earth on the top of the gearbox was tight and there was continuity.
Battery terminals were still tight...

Did a bit of wire pulling with the ignition on and nothing happened.  Then again, the instrument lights come on so wiggling wires with the engine not running probably isn't going to demonstrate the fault on the instruments, is it.

It could be absolutely anything but there's a thread on here about me having trouble with mine which sounded very similar and it was the relay under the seat on the right hand side of the frame in the rubber grommet.

Go to World Of Triumph and look at the fiche it's number 30.

Is this the fiche.  'Electrical equipment - 20.   PFKL1212234  BOOT. RELAY

http://www.worldoftriumph.com/triumph_motorcycle_parts_locator?block_01=&block_02=100059083-0-2&block_03=23772

That's the rubber boot for the relay which is inside.  I assume that's what you're referring to.

It makes me wonder..the relays are identified '5', '7', '8' and '30'.   5 is the indicator relay, 7 is the 'change over' relay    There are 3 x '8' and 1 x '30', yet they have the same part number and price.  Was someone not watching?

Any clue what the 'change over' relay does?

If this turns out to be correct, which relay was it?

and how does one test a relay?


I will add, now that I've remembered, that I have repaired the wiring to the ignition switch previously (on my 900 too  ).  I may just have to have another look at that.

[Timbox2]

Change over relay is I think what I would call Headlight Cut out relay.  The relay that Chris is referring to is the one that clicks off a few seconds after turning off ignition, its one these below,just not sure which: