3EN1 Main Relay Clicking - Bike Won't Fire Up

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BlueR32
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3EN1 Main Relay Clicking - Bike Won't Fire Up

Post by BlueR32 » Wed Oct 04, 2023 8:01 pm

On a short ride the other day the bike just died on the road. Pulled over and when ignition turned on I get a rapid clicking from the main relay.
I found this video describing it exactly but no clues as to root cause or fix:
https://www.youtube.com/watch?v=UrC_IBfChcA

Battery is 100% charged and is holding charge. All lights work fine. Starter motor turns over fine but bike will not start. No fuel pump or exup sounds either. If I disconnect the relay the exup does cycle.

I replaced the main relay with a new one but sadly that did not fix anything. Same rapid clicking.

Any ideas are most welcome!
Thanks

MadMotoUK
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Re: 3EN1 Main Relay Clicking - Bike Won't Fire Up

Post by MadMotoUK » Thu Oct 05, 2023 7:10 pm

I would venture a guess that it's a bad earth or a bad connection on the starter switch, the relay base or a joint in the loom. Either way, the relay is not getting a constant trigger signal but rather a pulsed one.

BlueR32
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Re: 3EN1 Main Relay Clicking - Bike Won't Fire Up

Post by BlueR32 » Fri Oct 06, 2023 10:18 pm

Problem solved! It was the connection to the fuel pump. Once I cleaned up the terminals inside the snap connector all was good again.

cbr400rrn
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Re: 3EN1 Main Relay Clicking - Bike Won't Fire Up

Post by cbr400rrn » Fri Oct 06, 2023 10:37 pm

Thank you for responding with your findings and your solution to the problem. It will hopefully help someone else in the future 👍

Brandon88
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Re: 3EN1 Main Relay Clicking - Bike Won't Fire Up

Post by Brandon88 » Fri Dec 22, 2023 9:43 am

Thanks mate, literally have the same problem.


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