2004 V-Strom 650 Loses Electric Power - Page 2 - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #11 of 19 Old 04-10-2019, 01:07 AM Thread Starter
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Well, the problem is back. The bike just refused to start when I was out getting lunch one day. I pulled out the battery and walked it home to recharge it, but it turned out to be mostly charged. When I returned the battery to the bike, the bike started just fine.

Then the next day, the bike started, but the instruments were resetting with their power-on sweep continuously. So, I aborted that trip and returned home. Good thing, too, since the bike wouldn't start again. Now the instrument backlights come on, but the LCD display doesn't show anything. The headlights and fuel pump come on, and I see the neutral light dim when I thumb the starter (no relay click, though).

So, I'm thinking a short-to-ground somewhere again. This time, I'll leave the key in the ignition when I pull apart the bike, and see if messing with the wires gives me a clue about where the short could be.
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post #12 of 19 Old 04-10-2019, 10:55 AM
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1. Batteries can do weird things. You need to monitor and report battery voltage. A cheap $5 digital meter will do, essential for a WEE.. My money is on the battery if all the other items are checking out. The fact that the charger thinks it's fully charged is not proof of a sound battery.

2. Main ground to the engine case and auxiliary ground (thin wire) coming from the battery. Make sure they have good clean contact.

3. It could be the ignition switch. Search here there are other reports about that switch acting up.

4. Another item to check/ confirm is that the instrument cluster connector is seated properly and not corroded. I had issues with that connector once not being seated right but it was far less severe than what you have.

Short: Normally if you have a short you blow a fuse. If you have a broken wire (pinched somewhere) that could be your scenario.
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Last edited by blaustrom; 04-10-2019 at 11:03 AM.
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post #13 of 19 Old 04-11-2019, 07:43 PM Thread Starter
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Quote:
Originally Posted by blaustrom View Post
1. Batteries can do weird things. You need to monitor and report battery voltage. A cheap $5 digital meter will do, essential for a WEE.. My money is on the battery if all the other items are checking out. The fact that the charger thinks it's fully charged is not proof of a sound battery.

2. Main ground to the engine case and auxiliary ground (thin wire) coming from the battery. Make sure they have good clean contact.

3. It could be the ignition switch. Search here there are other reports about that switch acting up.

4. Another item to check/ confirm is that the instrument cluster connector is seated properly and not corroded. I had issues with that connector once not being seated right but it was far less severe than what you have.

Short: Normally if you have a short you blow a fuse. If you have a broken wire (pinched somewhere) that could be your scenario.
Well, I load-tested the battery, and found that it was, in fact, junk. So I bought a new one and installed it. I thumbed the starter, got a click from the starter relay, then nothing.

I did some more poking around in the electrical system to no avail. My lunch break was just about over, so I started unscrewing the negative battery terminal to pull the new battery back out again.

As I was doing that, I heard a faint series of rapid-fire, continuous clicks from the relay just forward of the battery. I re-tightened the terminal screw, and the bike fired up just fine. I measured the voltage on the terminals (just to make sure that it wasn't a charging system failure that killed the old battery), and that checked out. Finally, I shut off and then re-started the bike twice more (which was uneventful) before I had to head back to work.

Any ideas on what is going on?
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post #14 of 19 Old 04-11-2019, 08:56 PM
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Originally Posted by UncleHayai View Post
Well, I load-tested the battery, and found that it was, in fact, junk. So I bought a new one and installed it. I thumbed the starter, got a click from the starter relay, then nothing.

I did some more poking around in the electrical system to no avail. My lunch break was just about over, so I started unscrewing the negative battery terminal to pull the new battery back out again.

As I was doing that, I heard a faint series of rapid-fire, continuous clicks from the relay just forward of the battery. I re-tightened the terminal screw, and the bike fired up just fine. I measured the voltage on the terminals (just to make sure that it wasn't a charging system failure that killed the old battery), and that checked out. Finally, I shut off and then re-started the bike twice more (which was uneventful) before I had to head back to work.

Any ideas on what is going on?
I think the combination of facts you mention (just now, as quoted) indicates that at least one connection to the battery was exhibiting excess resistance, and likely doing so intermittently. Fiddling with them while changing the battery renewed a barely-happening metallic contact, but it was still insufficient to carry cranking current and opened up when that current began to pass. Tightening the terminal screw may have cured the underlying problem, or it might have just acted as more fiddling which renewed a poor contact. I suggest getting somebody to look at the headlights while you wiggle the wires reaching the battery terminals. (That is yet more "fiddling".) If you are jostling a poor contact, the headlights will likely flicker a bit or a lot, and you will know there is a bad contact somewhere yet to be located. If the headlights stay steady, you probably fixed the bad contact when you tightened terminals on the battery. In that case, I would take the terminals back off and make sure that they have clean metal at the surface which is supposed to make good contact with the battery terminal. Then refasten them, securely. (You want enough contact pressure to preclude oxide growth between the contacting surfaces.)
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post #15 of 19 Old 04-11-2019, 10:04 PM
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You still have the old battery. Maybe it was not being charged properly because of poor contact???

I would go through all contacts I could get to, make sure they are clean, have good contact and re-install with dielectric grease. Then this will not happen again.

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post #16 of 19 Old 04-12-2019, 02:07 PM Thread Starter
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Originally Posted by Trepidator View Post
In that case, I would take the terminals back off and make sure that they have clean metal at the surface which is supposed to make good contact with the battery terminal. Then refasten them, securely. (You want enough contact pressure to preclude oxide growth between the contacting surfaces.)
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Originally Posted by blaustrom View Post
You still have the old battery. Maybe it was not being charged properly because of poor contact???

I would go through all contacts I could get to, make sure they are clean, have good contact and re-install with dielectric grease. Then this will not happen again.
I tested the contacts - they have no corrosion, and are conducting just fine.
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post #17 of 19 Old 04-13-2019, 07:34 PM
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I had very similar symptoms on a Aprilia Pegaso I use to own... It ended up being the side stand switch.

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post #18 of 19 Old 04-14-2019, 01:02 PM
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Quote:
Originally Posted by UncleHayai View Post
I tested the contacts - they have no corrosion, and are conducting just fine.
As I don't understand what "Tested contacts" means, not wanting to be a nag, just trying to help...
If it were me, I'd do what the last two guys suggested. Physically clean all contacts with a wire tooth brush or sand paper, then wipe them off to be sure no cleaning residue remains. Apply anything you have for grease, white lithium preferred.

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post #19 of 19 Old 04-15-2019, 01:59 AM
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Originally Posted by UncleHayai View Post
I did some more poking around in the electrical system to no avail. My lunch break was just about over, so I started unscrewing the negative battery terminal to pull the new battery back out again.

As I was doing that, I heard a faint series of rapid-fire, continuous clicks from the relay just forward of the battery. I re-tightened the terminal screw, and the bike fired up just fine.

Any ideas on what is going on?
That clicking relay is power on/off on/off as the connection is made. It definitely seems like a poor negative battery terminal contact - or did you touch or disturb any other wires while doing this? You have definitely found where the problem is. I would be cleaning the negative terminal wire connector with light sandpaper and as the battery is new should give a clean contact.
If all is good leave the ignition on and wiggle all the wires in that area. You either had a bad battery terminal or still have an intermittent fault within a wire. I'd concentrate first on both ends of the battery earth cable.

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