battery draw - Honda Foreman Forums : Rubicon, Rincon, Rancher and Recon Forum
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post #1 of 11 (permalink) Old 03-12-2017, 09:50 PM Thread Starter
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battery draw

i have a 2006 foreman 500 s
Battery goes dead after sitting on the side of my house for a while. ive done a draw test on it and its drawing about 90mA (0.09 A). the draw goes away when i pull the main fuse. i have torn the bike apart looking for the draw by unplugging components and i cannot find it. i have tried headlighs, taillights, solenoid, rectifier, computer, and a few other things. the only way to let the bike sit with out killing the battery is to pull the fuse out before storing it. no other fuses effect the draw.

need help. running out of ideas. has anyone had this problem or have any ideas on what it could be? thank you
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post #2 of 11 (permalink) Old 03-13-2017, 08:19 AM
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It sounds like you are going about this the correct way. I believe acceptable draw on an ATV should be less than 10mA. You said the problem goes away when you pull the main fuse, but pulling all the other fuses does not help. That means your short is undoubtedly somewhere between the main fuse and all the other fuses. Study that area of your wiring diagram and check everything out there. You might have to disconnect a wire here and there to guide you in the right direction.

Here is a video showing the coolest method I've ever seen for tracking down a short:
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post #3 of 11 (permalink) Old 03-13-2017, 09:36 AM
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Did you try unplugging the voltage regulator?

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post #4 of 11 (permalink) Old 03-13-2017, 06:17 PM Thread Starter
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yes i did. draw stayed the same
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post #5 of 11 (permalink) Old 03-13-2017, 06:44 PM
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There is a small draw that keeps the clock programmed in the display, if its fuel injected there may be a small draw for the computer. Could be a dirty electrical connection inside a switch or connector. Green corrosion bleeds power.

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post #6 of 11 (permalink) Old 03-13-2017, 07:57 PM
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I've looked at your wiring diagram. In the area between the main fuse and the other fuses, there are three components that could be causing your problem. They are:
1. regulator/rectifier
2. ignition switch
3. digital meter

I know you disconnected the regulator/rectifier and that did not improve your draw, so that can be eliminated.
The ignition switch is off when you test for draw, so I think that is unlikely to be causing your problem, but it should not be entirely eliminated at this time.
The most likely culprit appears to be your digital meter (display unit). Disconnect the big connector at the digital meter and see if your excessive current draw goes away.
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post #7 of 11 (permalink) Old 03-14-2017, 01:57 PM
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Yep, do what ktriebol said.


I just had a 350 Rancher that had the drain in the display.


Unplug the meter and see if the drain stops. If it doesn't, plug the meter back in and unplug the ignition switch.

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post #8 of 11 (permalink) Old 03-14-2017, 11:04 PM Thread Starter
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ok i found out that it is the display. thank you guys. what did you do? just replace the display?
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post #9 of 11 (permalink) Old 03-15-2017, 08:23 AM
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I think your best bet is to replace the display. If you go inside the display to try and find and repair the problem, you are likely to do more harm than good. You can probably find a good used display unit on eBay for a reasonable amount. Otherwise, you could buy a new unit from Honda. As a first step, I would at least go to an online Honda parts supplier to find out what their price for a new unit is. That would give you an idea of how much you would expect to pay for a used unit.
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post #10 of 11 (permalink) Old 03-15-2017, 09:53 AM
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New meter is $172.


Honda ATV Parts 2006 TRX500FM A METER Diagram


Used meters are about $100 on ebay. I would check miles on used units as you don't want one showing 15K miles if your wheeler has 2K miles on it.


Honda Foreman 500 FM FE 4x4 05-08 Speedometer Gauges 12831 | eBay


The top meter covers are replaceable and are only about $30, but if you buy a $100 meter and a $30 display cover you might as well buy a new meter. My .02

"The Good One"
2009 Foreman 500FM Green
27" Execs on Rubicon rims, Perfex
Heated grips and Thumb , HID's
5K Viper Max winch

"The Wreck"
2009 Foreman 500FM Green
Perfex with HL springs
27" Mudbugs on Rubicon rims
Heated Grips and Thumb, HID's
4K Viper Max winch

"The Project"
2006 Foreman 500FM Green
27" Titan 589's Perfex with HLsprings
3K Superwinch winch

"Sandy" aka the wife's
2009 475 Rancher AT Tan
26" Mudbugs on Rincon rims
Warn winch. Foreman pod light with HID, SRA gear reduction
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