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Author Topic: 900 won't start?  (Read 2335 times)
Gmoto
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« on: January 14, 2020, 09:46:50 PM »

Turn key, got lights and instruments, but no sound of fuel pump charge, press start and nothing. gone over wiring looking for loose connection, checked fuses, replaced starter relay, looking for next steps.
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greenmonster
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« Reply #1 on: January 15, 2020, 07:37:25 AM »

Check battery condition.
« Last Edit: January 20, 2020, 06:38:03 AM by greenmonster » Logged

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Howie
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« Reply #2 on: January 15, 2020, 07:44:28 AM »

Check battery condition means charge and load test.  Also check fuses, not just visually, check continuity.
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Gmoto
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« Reply #3 on: January 15, 2020, 11:10:50 AM »

Thanks Howie, will do, checked battery but doing it again. Also was told to check the fuel pump, your thoughts?
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Howie
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« Reply #4 on: January 15, 2020, 11:18:41 AM »

Cheap and easy first.  Battery, fuses, power to fuel pump relay, relay working, then the big stuff.
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Duck-Stew
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« Reply #5 on: January 15, 2020, 09:21:50 PM »

Non-start problems on injected Monsters are rarely component failure. Almost always electrical.
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Gmoto
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« Reply #6 on: January 16, 2020, 09:30:07 PM »

My thoughts too. Plan to spend the weekend following up on these suggestions. Hopefully be back with good news.
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Gmoto
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« Reply #7 on: January 18, 2020, 02:44:32 PM »

Starter turns over when I short cut relay. Where is the fuel pump relay located? Of the two relays located on the side of the fuse box one smaller than the other and mine is yellow, are either of these the fuel pump relay. Battery tests good. Sorry for sounding like an idiot, probably am under the circumstances!
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Speeddog
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« Reply #8 on: January 18, 2020, 02:47:28 PM »

What year 900 is it?
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- - - - - Valley Desmo Service - - - - -
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~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~
Gmoto
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« Reply #9 on: January 18, 2020, 02:55:36 PM »

2000
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Howie
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« Reply #10 on: January 19, 2020, 02:42:30 PM »

If memory serves me right the yellow relay is the main relay and the black is FI.  Easy way to figure it out.  The connector for the main relay will have 5 terminals in the connector the FI relay 4.  When you locate the relay remove it and jump terminal 30 (red/blue wire) to 87(brown/white wire).  Urn key on. If pump primes new relay, if not more trouble shooting is in order.
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WTSDS
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« Reply #11 on: January 21, 2020, 12:40:44 PM »

Kill switch?
Side stand has a switch too.....

I have got same 'bike, those two switches have given me some "oh no" moments.
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2000 Monster Dark 900 ie   Stock except for low Staintunes and a centrestand. 15:39 sprockets make for excellent highway gearing
Gmoto
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« Reply #12 on: January 21, 2020, 08:44:46 PM »

Still in the hunt and these are great next steps! I was wondering how to short cut the relay, thanks guys. just thinking down the road, hopefully NOT! But is there a way to test the fuel pump without having to remove it? Out of frustration over the weekend I went ahead and ordered that relay (5 prong) $15 no big. Guess I should include the 12 pac of Modelo too. 
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Speeddog
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« Reply #13 on: January 21, 2020, 09:59:42 PM »

Fuel pressure should be ~45psi with the pump running.

If you don't have a wiring diagram, now would be a good time to get one.
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- - - - - Valley Desmo Service - - - - -
Reseda, CA

(951) 640-8908


~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~
Howie
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« Reply #14 on: January 21, 2020, 11:00:48 PM »

Still in the hunt and these are great next steps! I was wondering how to short cut the relay, thanks guys. just thinking down the road, hopefully NOT! But is there a way to test the fuel pump without having to remove it? Out of frustration over the weekend I went ahead and ordered that relay (5 prong) $15 no big. Guess I should include the 12 pac of Modelo too. 

If memory serves me right the yellow relay is the main relay and the black is FI.  Easy way to figure it out.  The connector for the main relay will have 5 terminals in the connector the FI relay 4.  When you locate the relay remove it and jump terminal 30 (red/blue wire) to 87(brown/white wire).  Turn key on. If pump primes new relay, if not more trouble shooting is in order.
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