10A or 20A fuse for zong?

[Pliskin]

Hi,

Can anybody tell me because i am finding conflicting information which fuse i should use.
In lzx200gy-2ec-manual.pdf it says to use 10A fuse but in my users manual it's 20A. Any suggestions?

Thank you.

[makenzie71]

You never use a higher fuse than you need. So take volts divided by watts and get your proper fuse rating.

For example, if you have a 50w high beam, the brake indicator light is 25w, turn signals are 25w (x2), plus 10w for miscellaneous LED's and bulbs and widgets in the dash...then your total wattage is 135w. 135 divided by 13vdc is 10.38 amps. In that example, no need for bigger than 15amp fuse.

[Pliskin]

Thank you makenzie71,

You learn something new everyday. What happened when i bought my bike is that fuses kept blowing all the time. I think original was 10A but then i started increasing to 15A and now i am at 20A. But i don't think that is good from reading your post. I am going back to 10A.

This is what i have:
12V 35W/35W - headlamp
12V 5W/21W - taillight/brake light
12V 10Wx4 - turn signal light
12V 1.7Wx2 - turn signal indicator
12V 1.7Wx2 - meter light
12V 1.7W - neutral indicating light
12V 3W - position light

Thank you for your help.

[FastDoc]

You never use a higher fuse than you need. So take volts divided by watts and get your proper fuse rating.

For example, if you have a 50w high beam, the brake indicator light is 25w, turn signals are 25w (x2), plus 10w for miscellaneous LED's and bulbs and widgets in the dash...then your total wattage is 135w. 135 divided by 13vdc is 10.38 amps. In that example, no need for bigger than 15amp fuse.

Darn smart answer!

I was just gonna guess 15!

[makenzie71]

This is what i have:
12V 35W/35W - headlamp
12V 5W/21W - taillight/brake light
12V 10Wx4 - turn signal light
12V 1.7Wx2 - turn signal indicator
12V 1.7Wx2 - meter light
12V 1.7W - neutral indicating light
12V 3W - position light

Can you turn both your blinkers on at the same time? If so then add another 20w to the equation later. If not, then you're looking at a maximum wattage draw of 82w, bumped to 90w for a margin for error. 90w at 13v comes to a 6.92amp draw. At your worst, pulling 11v, you should be well under 10amps.

If you're blowing a 10 amp fuse you are seeing a heavy amp draw somewhere. I would put a multimeter to your battery with the bike running and rev it up a bit. Make sure you're running proper voltage. If you're R/R isn't keeping up with the demand and your voltage drops then your amp draw will shoot through the roof.

[Pliskin]

Can you turn both your blinkers on at the same time? You mean all 4 flashing like in an emergency? Don't think i can do this on Zong. Otherwise blinkers work fine. It's only when i turned on the high beam when the fuse would blow. Especially when my bike was outside and it was raining. That's why i avoid touching high beam switch like a bubonic plague :lol:

I will do the little test that you mentioned. I am really clueless when it comes to electrical stuff. :oops: But these little pointers help a lot.


If you're blowing a 10 amp fuse you are seeing a heavy amp draw somewhere.

That's what i am thinking too. The original head light bulb was philips but the one i have is chinese. It's much brighter then philips was. Maybe it's taking more juice then it's sepouse to, not sure. Only guessing here.

[makenzie71]

Brighter = more watts. What was stock and what do you have now?

[SpudRider]

My Zongshen Motorcycle Maintenance Manual specifies a 20A fuse, so that is what I am using. I upgraded my headlight to a brighter, 55/60W, H4 bulb in my Zong, and I don't have any problems blowing fuses. ;) If you can't touch your high beam switch without blowing a fuse, you probably have a short in your left switchgear. ;) You might enjoy reading the following thread to learn more about your left switchgear. :)

http://www.chinariders.net/modules.php?name=Forums&file=viewtopic&t=9946

Spud :)

[Pliskin]

Brighter = more watts. What was stock and what do you have now?
Stock was 12V 35W/35W, that's what i am using now. The only difference i've noticed between philips and chinese is that glass was thicker on philips bulb but chinese is much brighter.

My Zongshen Motorcycle Maintenance Manual specifies a 20A fuse, so that is what I am using.
Well it depends :?
http://img821.imageshack.us/img821/5376/page60n.jpg (http://imageshack.us/photo/my-images/821/page60n.jpg/)

Page 6 does tell you to use 20A

http://img705.imageshack.us/img705/8528/page10h.jpg (http://imageshack.us/photo/my-images/705/page10h.jpg/)

But if you go to page 42 :lol:

http://img716.imageshack.us/img716/1328/page48.jpg (http://imageshack.us/photo/my-images/716/page48.jpg/)

That is a good point about switchgear will definately check that later on. Thank you guys for your help.

[SpudRider]

You're welcome. :) I'm not surprised about the discrepancy in your User's Manual regarding the fuse size. ;) Unfortunately, the Chinese manuals are notorious for this sort of discrepancy. :roll: However, I believe my Zongshen Motorcycle Maintenance Manual only specifies a 20A fuse. I replaced my Zong's fuse once, and I also believe it was rated at 20A. :)

I encourage you to read my thread, and check the left switch gear. :) It's entirely possible you have an electrical short on your high beam switch. ;)

Spud :)

[makenzie71]

Definitely check the switch. If the fuse is blowing the instant you flip the switch then there's a short. A high amp draw would burn the fuse up pretty slowly...it'd still be fast but you'd perceive the delay.

[Pliskin]

I encourage you to read my thread, and check the left switch gear. Smile It's entirely possible you have an electrical short on your high beam switch. Wink
Very interesting post will definitely check the left switch gear.

Thank you Spud & makenzie71.