Mk3 - bike runs but the indicators, lights & horn don't work

Fungus GS · Post by **Fungus GS** » 06 Nov 2011, 14:42

A bit of a pain with no battery to power everything, but I'm unsure where to even start checking for whatever fault it is that's causing my CRM to be able to run but not power the lights/horn

Anyone got a suggestion of possible causes & how to test them, please...? I've got a chance to go green laning on 17th & need to be up & running by then so any help will be greatly appreciated.

Thanks a lot,

Post by **knackeredMk1** » 06 Nov 2011, 16:16

I use a PP3 9volt battery in place of the cylindrical capacitor that sits under the headlight. Just disconnect the capacitor and connect the PP3 + to red and - to green.

Have you checked the fuse by the lights switch

.

Post by **Jonorow** » 06 Nov 2011, 18:05

I'd say the capacitor is disconnected somehow, or has failed. that will loose you the lights or everything really except the engine.

Post by **knackeredMk1** » 06 Nov 2011, 18:06

J might be correct

but I've never heard of one going wrong. Sounds reasonable though.

Post by **back off road** » 06 Nov 2011, 19:15

not alot to go wrong but the connector plug coming off is worth a look

Fungus GS · Post by **Fungus GS** » 06 Nov 2011, 19:52

Thanks a lot, gents.

The PP3 trick will make it a lot easier to check, without having to kick it up everytime I need power...

I've checked the little 5A fuse & the capacitor is plugged in correctly but, if my research & wiring diagrams are right, it doesn't make any difference as power goes around it. I've got a copy of the workshop manual with a trouble shooting guide (Ch14-3) & it says to check the headlight relay first, which I've done, & that doesn't seem to be closing properly when power is supplied. Hopefully, a new one should fix it. I was leading a ride around the Lakes a few weeks ago & stuffed my maps down behind the headlamp cowl so might have done some damage to it, then... I'll keep you posted.

Fungus GS · Post by **Fungus GS** » 08 Nov 2011, 21:10

Update: Well the replacement headlight relay went in this evening & all is now working as it should be... It was a surprise to find all the lighting power being routed through one relay like that.

Thanks again for the tips - especially liked the battery one :-)

Post by **fishtail** » 15 May 2012, 02:26

this PP3 connected to the capacitor is a good tip... anyone think it should be in the FAQ? for troubleshooting tip?

is it ok if I use a 12v battery? i have a spare old battery from a TW200 - its not totally dead,,,,

Mk3 - bike runs but the indicators, lights & horn don't work

Mk3 - bike runs but the indicators, lights & horn don't work

Re: Mk3 - bike runs but the indicators, lights & horn don't work

Re: Mk3 - bike runs but the indicators, lights & horn don't work

Re: Mk3 - bike runs but the indicators, lights & horn don't work

Re: Mk3 - bike runs but the indicators, lights & horn don't work

Re: Mk3 - bike runs but the indicators, lights & horn don't work

Re: Mk3 - bike runs but the indicators, lights & horn don't work

Re: Mk3 - bike runs but the indicators, lights & horn don't work