Fuel pump not kicking in - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 14 (permalink) Old 11-09-2019, 06:58 AM Thread Starter
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Fuel pump not kicking in

Hi all
I posted the other week about my fuel pump not kicking in when i tried to start my FJR 1300. i finally found the problem it turned out it wasn't the fuel pump or fuel pump relay, after tracing the wires back they go to the starter solenoid, just behind the gattery. there are 2 fuses on this 1 at each side. The one nearest the battery works the fuel pump it had blown, it's a 15 amp fuse soon as i replaced it the fuel pump fired up so alls good. thx for all the help. I have taken a pic & uploaded it here
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post #2 of 14 (permalink) Old 11-09-2019, 08:09 AM
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Hi all
I posted the other week about my fuel pump not kicking in when i tried to start my FJR 1300. i finally found the problem it turned out it wasn't the fuel pump or fuel pump relay, after tracing the wires back they go to the starter solenoid, just behind the gattery. there are 2 fuses on this 1 at each side. The one nearest the battery works the fuel pump it had blown, it's a 15 amp fuse soon as i replaced it the fuel pump fired up so alls good. thx for all the help. I have taken a pic & uploaded it here
Thats good to know - do you have any idea why it has blown?
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post #3 of 14 (permalink) Old 11-09-2019, 09:30 AM
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Originally Posted by keith mountford View Post
Hi all
I posted the other week about my fuel pump not kicking in when i tried to start my FJR 1300. i finally found the problem it turned out it wasn't the fuel pump or fuel pump relay, after tracing the wires back they go to the starter solenoid, just behind the gattery. there are 2 fuses on this 1 at each side. The one nearest the battery works the fuel pump it had blown, it's a 15 amp fuse soon as i replaced it the fuel pump fired up so alls good. thx for all the help. I have taken a pic & uploaded it here
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Thats good to know - do you have any idea why it has blown?
My thoughts exactly. Fuses do not just blow on their own. Something caused higher amperage to go through the circuit (short) and the fuse blew to protect other parts. I would do a little more inspecting and circuit testing before riding too far from home.
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post #4 of 14 (permalink) Old 11-09-2019, 10:05 AM
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Great find on the fuse issue! Adding that to the list of things.
Here's a little bit of light reading to assist with any needed wiring repairs.
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File Type: pdf NASA_Wiring_Standards.pdf (2.28 MB, 11 views)
File Type: pdf Wiring Techniques.pdf (773.7 KB, 8 views)

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post #5 of 14 (permalink) Old 11-09-2019, 10:46 AM Thread Starter
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i think it was because i got home from work and left my keys in the bike with the ignition on all nite which did flatten the battery. the reason i never saw what i did is because i'd covered it up. but now i've replaced it, it's working fine now
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post #6 of 14 (permalink) Old 11-09-2019, 11:09 AM
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Great find on the fuse issue! Adding that to the list of things.
Here's a little bit of light reading to assist with any needed wiring repairs.

Those are like the two mil-spec soldering courses the US Army subjected me to. Great in a production or even a shop environment. But alas, it's just a little different working on a radar on a German or Korean hilltop 2AM in February.
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post #7 of 14 (permalink) Old 11-09-2019, 12:35 PM
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But alas, it's just a little different working on a radar on a German or Korean hilltop 2AM in February.
Yes indeed. Field repairs under duress are a different thing entirely!
But, as I'm working in my garage, I've found them to be extremely helpful & haven't had a NASA standard repair/mod fail yet.

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post #8 of 14 (permalink) Old 11-09-2019, 01:23 PM
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A long time ago, in a galaxy far, far, away - OK, a State a few hundred miles from here. I had a problem with the (yes THE) fuse in my SL350 blowing without being able to figure out why. Skipping to the last page of the saga, it turned out that lead to the brake light ran in a channel built into the rear fender and the insulation chafed through within that channel. When I hid the brakes and the wire bounced against that fender at the same time the fuse would blow and the bike shut down. A summary of the intervening chapters involves a field replacement of the fuse with a piece of random wire found on the side of the road and a melting of both brake light switches.

The moral? I would trace the wiring between this fuse and the pump and be sure nothing is amiss with that wiring.
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post #9 of 14 (permalink) Old 11-09-2019, 05:41 PM
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i think it was because i got home from work and left my keys in the bike with the ignition on all nite which did flatten the battery. the reason i never saw what i did is because i'd covered it up. but now i've replaced it, it's working fine now
I would be going through all the multi plugs and tracing the wiring there has to be some reason the fuse has blown. It could just have been a resistance build up in a multi plug, ive seen this before.

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post #10 of 14 (permalink) Old 11-09-2019, 09:54 PM
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What year is this FJR? Perhaps create a signature line with that info...

I want to look into the wiring diagram and what fuse is required there.

Ray
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