Author Topic: Indicators, Horn & Brake Lights  (Read 3271 times)

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May 11, 2016, 12:40:40 PM on

Offline HockleyBoy (OP)

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For the last couple of weeks I have had an intermittent fault with my indicators only functioning when the handlebars are turned either slightly left or right. This morning on the way to work they have failed totally along with the horn and the brake lights.

Given that moving the handlebars was slightly was making them work (and I have also replaced the fuse as a precaution) I assume that the problem is a broken wire or loose connection somewhere. As I am pretty useless on electrical stuff (except the charging system which I have spent a lot of time on!) I wondered if someone clever out there who has a copy of the wiring diagram could point me in the right direction for some fault finding.

Thanks in advance.
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May 11, 2016, 02:01:38 PMReply #1 on

Offline JayDub

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Sounds like a bad earth connection.  Follow the cable from the L/H switch gear, it will lead you to a connector/multi pin plug to the main loom there will probably lie the fault.  Check its tight and check its connections are clean, also make sure the wires are not pinched or damaged.
Look for any broken earth wires - I don't know what colour the earth is on your model.
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May 11, 2016, 02:16:51 PMReply #2 on

Offline HockleyBoy (OP)

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Thanks, looks like I have a fun evening ahead!
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May 11, 2016, 04:58:40 PMReply #3 on

Offline Timbox2

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Have a look at the white/green wire from the base of the ignition switch, could be.
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May 11, 2016, 08:27:21 PMReply #4 on

Offline HockleyBoy (OP)

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Have a look at the white/green wire from the base of the ignition switch, could be.

And the prize goes to Timbox2. Wire from the ignition switch was severed inside the black casing behind the cable guide. Cleaned it up, added a bit of extra wire and I am back in business. :icon_biggrin:

Thanks guys.
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May 11, 2016, 09:35:56 PMReply #5 on

Offline JayDub

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Have a look at the white/green wire from the base of the ignition switch, could be.
is that a supply to the bar switches Tim?
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May 12, 2016, 06:35:12 AMReply #6 on

Offline Timbox2

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is that a supply to the bar switches Tim?

Not directly no, i think it supplies a feed to the horn, indicator relay and brake light switches, the bar switches themselves complete the earth side when activated, well,  thats what it looks like in the wiring diagram. But I had a vague recollection of someone else having the exact same issue years back, and green/white wire just rang a bell. Its also a reason that the feed wire to the horn is a useful pickup for a switched supply for sat/navs etc, but often overlooked.
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May 12, 2016, 09:03:02 AMReply #7 on

Offline JayDub

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 :>< well done, handy to know.
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May 12, 2016, 06:09:04 PMReply #8 on

Offline ghulst

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Its also a reason that the feed wire to the horn is a useful pickup for a switched supply for sat/navs etc, but often overlooked.
Very useful info that. :)
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January 06, 2020, 06:19:52 AMReply #9 on

Offline tigergotcha

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Had the same syntoms on my bike (horn, brake lights, indicators all suddendly off) and the culprit was the green/white wire inside the ignition switch. Being quite impossible to loose anti-theft bolts I opted to remove the whole upper yoke, switch attached. Easier and doable with  tank on. This post was crucial to help me solving the  problem!

February 07, 2020, 08:18:38 AMReply #10 on

Offline Timbox2

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Had the same syntoms on my bike (horn, brake lights, indicators all suddendly off) and the culprit was the green/white wire inside the ignition switch. Being quite impossible to loose anti-theft bolts I opted to remove the whole upper yoke, switch attached. Easier and doable with  tank on. This post was crucial to help me solving the  problem!

With most of these bikes approaching 20 years young it wont be the last
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