Reversed battery and now no power - Wrist Twisters
 
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post #1 of 23 Old 05-22-2012, 08:39 AM Thread Starter
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Reversed battery and now no power

Yep. I'm an idiot. I know. I had to replace my battery and when I did, I reversed the polarity. It took me a couple of minutes to realize what I did and now when I have put the cables back in their correct place I'm getting no power at all (no lights, no fuel pump whirring, nothing). I checked the fuse box with the multiple 10 and 20 amp fuses, but I didn't realize that there was a 30 amp fuse that I missed and I'll be checking that tonight. Assuming that's not the problem, any suggestions from the geniuses? (that would be you guys)

Thanks in advance.

2003 Honda 919 - flapper mod, Clear Alternatives Smoke Tailight w/ integral turn signals, Stebel Nautilus air horn, DIY fender eliminator, LED license plate bolts, LED front turn signals, no resistor or new flasher so I blink like crazy.
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post #2 of 23 Old 05-22-2012, 08:42 AM
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You will have a blowned 30amp fuse!

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post #3 of 23 Old 05-22-2012, 09:03 AM
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+1, it's gotta be a fuse. Fuses are there to protect the bike from idiots, no offence intended

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post #4 of 23 Old 05-22-2012, 09:37 AM
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post #5 of 23 Old 05-22-2012, 09:55 AM Thread Starter
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Quote:
Originally Posted by ariannasdaddy View Post
You will have a blowned 30amp fuse!
I'm really hoping that's all I screwed up.

Quote:
Originally Posted by g00gl3it View Post
+1, it's gotta be a fuse. Fuses are there to protect the bike from idiots, no offence intended
No offence taken. I'm the first one to admit that I was an idiot in doing this.

2003 Honda 919 - flapper mod, Clear Alternatives Smoke Tailight w/ integral turn signals, Stebel Nautilus air horn, DIY fender eliminator, LED license plate bolts, LED front turn signals, no resistor or new flasher so I blink like crazy.
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post #6 of 23 Old 05-22-2012, 10:54 AM
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Shouldn't be any damage, that's why the fuse is there. x)

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post #7 of 23 Old 05-22-2012, 01:35 PM
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Don't worry I did the same thing when I installed my new battery

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post #8 of 23 Old 05-22-2012, 01:46 PM
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Quote:
Originally Posted by mercenario27
Don't worry I did the same thing when I installed my new battery
Me too. Its pretty easy to do if you're not paying attention. I was a little worried too until I found the popped fuse. Good to go after that.

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post #9 of 23 Old 05-22-2012, 02:51 PM Thread Starter
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Any chance there is a spare fuse on the bike for this? Or am I going to have to find one somewhere?

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post #10 of 23 Old 05-22-2012, 04:22 PM
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Yup, there is a spare fuse held in a little pocket right next to the starter relay four pole connector, which incidentally you have to unplug to get at the fuse. Regardless of the availability of a spare fuse ... pick up another on your way home. A good way to prevent another "Idiot moment" in the future. No offense.

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post #11 of 23 Old 05-22-2012, 04:22 PM
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There is a holster for a spare, right next to the main fuse.

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post #12 of 23 Old 05-22-2012, 04:23 PM
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OH, You too fast for me.....

TWSS!!

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post #13 of 23 Old 05-22-2012, 04:41 PM
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Aren't the fuses there to protect the electronics from drawing too much positive power from the positive side.

By sending positive power backwards through the system, you are sending juice through the frame of the bike and through all the grounds.
I hope it's just a fuse, but I would be worried of the potential that you damaged the pcm by sending positive power backwards through the ground.

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post #14 of 23 Old 05-22-2012, 05:25 PM
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I am yet to find somewhere that the 919 uses the frame as the neutral line. There are 2 wires that run straight from the battery to the fuse. Incorect placement of the battery simply blows the fuse.

Of course, thats just my understanding. I have been wrong once or twice before.

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post #15 of 23 Old 05-22-2012, 06:34 PM Thread Starter
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Quote:
Originally Posted by EatDirtFartDust View Post
Aren't the fuses there to protect the electronics from drawing too much positive power from the positive side.

By sending positive power backwards through the system, you are sending juice through the frame of the bike and through all the grounds.
I hope it's just a fuse, but I would be worried of the potential that you damaged the pcm by sending positive power backwards through the ground.
Lucky for me it was just the fuse. Switched them out and all is back to normal. Woohoo for me.

2003 Honda 919 - flapper mod, Clear Alternatives Smoke Tailight w/ integral turn signals, Stebel Nautilus air horn, DIY fender eliminator, LED license plate bolts, LED front turn signals, no resistor or new flasher so I blink like crazy.
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post #16 of 23 Old 05-22-2012, 06:54 PM
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i did the same thing. It's most likely that fuse.

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post #17 of 23 Old 05-22-2012, 07:00 PM
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Be sure to connect the positive side of the fuse to the positive side of the fuse holder

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post #18 of 23 Old 05-22-2012, 07:04 PM
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Quote:
Originally Posted by EatDirtFartDust
Aren't the fuses there to protect the electronics from drawing too much positive power from the positive side.

By sending positive power backwards through the system, you are sending juice through the frame of the bike and through all the grounds.
I hope it's just a fuse, but I would be worried of the potential that you damaged the pcm by sending positive power backwards through the ground.

But it needs to complete the circuit to "fry" anything. The fuse pops breaks the connection grounds & powers are then both dead, no way for it to do damage.

Plus electricity actually flows from negative to positive, they guessed wrong on that one.

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post #19 of 23 Old 05-22-2012, 08:16 PM
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Quote:
Originally Posted by HeliMech View Post
But it needs to complete the circuit to "fry" anything. The fuse pops breaks the connection grounds & powers are then both dead, no way for it to do damage.
There is one circuit that is powered at all times: the rectifier / regulator. Connecting the battery backward biased all the diodes and created a multiple path short to ground. Fortunately they are very high current rated components and survived. The only other key off component, the instrument cluster memory keep alive, is reverse polarity protected for just such an occurrence.
Quote:
Plus electricity actually flows from negative to positive, they guessed wrong on that one.
Absolutely! Just ask 'most any Tig welder -- they'll say you can see which way it flows -- negative to positive.

Rob

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post #20 of 23 Old 05-23-2012, 05:58 AM
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Quote:
Originally Posted by robtharalson
There is one circuit that is powered at all times: the rectifier / regulator. Connecting the battery backward biased all the diodes and created a multiple path short to ground. Fortunately they are very high current rated components and survived. The only other key off component, the instrument cluster memory keep alive, is reverse polarity protected for just such an occurrence.Absolutely! Just ask 'most any Tig welder -- they'll say you can see which way it flows -- negative to positive.

Rob

Great info.......as always.

Cheers,
Ian

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post #21 of 23 Old 05-23-2012, 10:00 AM Thread Starter
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Well, it's official, it was just the 30 amp fuse that was causing my problems. Changed that out last night and rode to work this morning. All is good in the 9er's 'hood today. Woohoo. Now to go get a new 30 amp fuse to put back in the little holder for future moments of dementia.

2003 Honda 919 - flapper mod, Clear Alternatives Smoke Tailight w/ integral turn signals, Stebel Nautilus air horn, DIY fender eliminator, LED license plate bolts, LED front turn signals, no resistor or new flasher so I blink like crazy.
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post #22 of 23 Old 05-23-2012, 10:58 AM
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Good to hear you are back in the saddle.



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post #23 of 23 Old 05-23-2012, 04:35 PM
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Very relieved for you.

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