Hi guys, I noticed the other day that the 2004 XTX rear light pulses when the indicators are on. It happens when the running light is on, and also when the brakes are applied (it 'pulses' brighter of course when brakes are applied).

This happens when either left indicator, right indicator, or hazards are on.

The indicators are standard, the rear light bulb is an led one. I get a feeling that there is a short somewhere?

Here is what I have done to see what is going on:

-Remove rear bulb, measure voltage of the 'tabs' in the light socket, sure enough when indicators are on the voltage goes up and down, when indicators are off it is constant.

-Unplug rear light wiring (gear selector side of bike, underneath where pillion handles would be) and measure the voltage coming out of the wiring loom towards the rear light. There were the same fluctuations in voltage when indicators selected, but constant voltage when not selected.

-Unplugged indicators from wiring loom on gear selector side of bike under pillion handles and measured the voltage at the same places as described above, same result. (This leads me to think that indictor bulbs are not to fault, and there is a short somewhere deeper in the system)

-Unplugged rear brake foot pedal switch above airbox on brake pedal side of bike. The rear light still pulses when indicators are on.

-Unplugged indicator relay, this stops the rear light from flashing when the indicators are selected (obviously), and so I believe there is a short somewhere inbetween the relay and the indicator bulbs. When the indicators are selected the wires going into the relay give a constant voltage, when the indicators are not selected there is 0V, as expected.



I have tried to follow the wires around the wiring loom but I can't see where they go.

I am very grateful for any help,

Thanks

Harry


p.s. I just had a thought, it's not a safety sytem that has been included so you are more visible when indicating is it?

Sounds like a bad earthing

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Mods, Oxford heated grips, Givi Rack and top box, Stage 2 DNA filter and top, 02 sensor eliminator, Metal Mule taller screen, Seat hump trimmed off, .KEVS FUEL MOD (THE 1ST ONE FOR THE TENERE) , Extra fuse box, 12volt plug in socket, Zumo550 sat nav, , Barkbusters


What Bill Clinton REALLY said to Monica Lewinsky was: "Sack my cook"

Sadly Bike now sold 11/6/11

Sure sounds like a bad earth.

Run a temporary loose wire from the battery earth to the earth wire on the tail light, then test to see if that fixes it.

If that does not fix it, run the loose earth wire to each indicator earth wire one at a time & retest.

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Mods that I have done to my XTX's

My 04 XTX
Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil /
[
My 07 XTX
Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator /

My 09 XTX
59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details

Now ride a 2018 MT09SP ABS + TCS

My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946

EDIT:

Ok I just ran an earth wire direct from the battery to the tail light earth, had the same problem. Then ran it to rear indicators one at a time, same problem. The wire I used was not long enough to reach the front indicators, I will try that another time.

Another thing to add: if I leave for example one of the indicator wires on the rear left indicator unplugged, the front left indicator flashes at a faster rate as expected. The rear light also flashes at this same faster rate. This further points to a bad earth I think.

Any other ideas?

Many thanks

Harry

If you have a volt meter, can you put it on the Milli volt setting, put the positive cable on the battery earth & the neg cable on the tail light earth then make it fault & give me the reading, also do the indicators circuit.

After taking the readings can you remove & sand the earth wire at the battery, also remove the earth strap at the engine & sand paper the wire & earth point on the motor & put it back together.

Can you also give me your battery voltage with the bike running with the revs up around 3000rpm mark.

__________________
Click here to join the XT Supporter's scheme

Mods that I have done to my XTX's

My 04 XTX
Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil /
[
My 07 XTX
Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator /

My 09 XTX
59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details

Now ride a 2018 MT09SP ABS + TCS

My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946

Arghhhh this morning the indicators or running light won't come on! The brake light comes on when applied though. I get a feeling a fuse has gone somewhere? Where would this mysterious fuse be?

Also now the lights aren't coming on, when I measure the voltage of the two wires going into the flasher relay, it is always 0V, so a fuse has gone somewhere inbetween the indicator switch on the handle bar and the relay?

Thanks

Harry