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Tony86 04-06-2019 12:40 PM

48v 1000 go kart upgrade to 1800w
I have a 48v1000w buggy go kart I have bought the 1800w motor and need to buy the computer to go with it mine is a 3 speed key switch and I see online there computers come with 2 speed is there another computer out there??? Or is there only a wire bypass but I'm sure America they sell the same buggy go kart with a 1800 3 speed any information would be so grateful its for my daughter and wanna get it upgraded asap thankyou

itsid 04-07-2019 11:26 AM

Controller, not Computer!

And three speed vs two speed isn't that much of a difference really,
since both variants are as quick
(one can reduce max speed in two, the other in just one step)
Since I believe the setting was never at "slowest" you'd be fine with a two speed controller.

Anyways.. to be sure, show us the motor you bought (the label is most important)
and we might be able to dig up the controller that'd work best for you
(with any luck even one with a three position speed limiter)


Tony86 10-13-2019 05:12 PM

48v1800w wiring or somthing issue
Hi all back again after I got a new computer and motor thinking that the 2 was broken and it's till not working I have checked
48v and fully charged
Ebike controller tester tested pedal responds to tester light comes on as bright as you press it so didn't feel the need to replace it same with battery as it has 48v
Bin through all connections to see if there's a short but can't see anything and have spent hours double checking everything and I just hope someone can tell me somthing hopefully ? Can you bypass the pedal with jumper wires
Or volt check on foot pedal I'm just guessing and I've checked everything it can be the only thing I haven't replaced is the battery and the pedal but checking them they say there fine please any ideas thrown out there will be worth it as I've onistly tried everything I did have it working once put it back together and somthing happened since then hasn't worked we can get the motor to move a lil bit but not properly and will stop in few secs and not work again thankyou

itsid 10-13-2019 07:59 PM

I think you are talking about this projeect, right?

thus merged!

Post pics of what parts you are dealing with exactly..
I think you might have missed something important..


Tony86 10-14-2019 01:06 PM

48v 1800w go kart
9 Attachment(s)
thanks for your help Sid I uploaded some pics I have switched the 3 phase wires around but nothing

itsid 10-14-2019 04:22 PM

yeah and the important part still missing..
what motor, what controller (model, specs etc...)

Since frankly I have the suspicion you tried to fire up a 1800W motor with a 1000W Controller,
thus burned the Mosfets of said controller (now essentially a paperweight)

And what are the paired wires in the HE sensor connector?
since when there are two seonsors per coil(set)?


Tony86 10-14-2019 05:44 PM

2 Attachment(s)
Thanks for the reply did I have uploaded the pics of motor and controller as for the sensor wire not to sure what you mean by that ?

Tony86 10-14-2019 05:45 PM

Sorry there were the inverted gear ones for forward and reverse yellow black forward grey and black backwards

itsid 10-14-2019 09:50 PM

Have you minimum wired that thing already?
(ie: battery, motor phases, HE sensor, on/off switch, throttle and NOTHING else)
it's usually the 'testconfig' (should run slow but should run)
frankly it should run (albeit somewhat miserably) without the HE sensor attached at all..

Next up would be brake
(might be reversed.. i.e. if plug isn't populated it must be shortened)
then speed/governor switch or respectively forward/reverse switch.

I need to check the images with a set of fresh eyes tomorrow
can't see no sore thumb sticking out at least :D
(it's 5:50 am here and I'm getting a bit tired I admit)


Tony86 10-15-2019 07:40 AM

Thanks again sid I had a look at the brake it wasn't connected as I didn't think it was essential but the wires did need swapping around and has 5 volts and kills power when brake pressed but still nothing


Tony86 10-16-2019 07:03 AM

Forward and reverse have been swapped around still nothing I feel like there's a short there because sometimes it moves a lil bit more but could be a guess I have 5 volts going through it thankyou

---------- Post added at 07:03 AM ---------- Previous post was at 07:01 AM ----------

I bypassed on and off switch so defo not that worked fine

Functional Artist 10-16-2019 07:40 AM

3 Attachment(s)
I can see that you have the (3) "big" power wires "matched up" (going to the motor)
...but, I can't tell for sure (from the pic below) if the (5) "small" sensor wires are matched up?
(they must be) :thumbsup:

Here is a diagram for this motor/controller :cool:
...& also some of the switches needed for this application. :cheers2:

* Have you read thru this thread? :huh:

itsid 10-16-2019 07:36 PM

yeah .. couldn't tell either.. green/blue might have been swapped,
but that should only reverse direction really...

what trips me off are the additional red[orange?] and black wire in the pic..
they seem to go to the HES connector so 7 wires on a 5pin plug.

Have you shortened the brake connector yet to see if it's made for an NC-Switch instead of an NO switch?
if not, do that first please...


Tony86 10-21-2019 01:01 PM

Thanks Sid and functional artist yes all connected and checked for volts and they all have going through them and they are all matching, the brake and on and off switch have been jumpered and no difference :(

Tony86 10-24-2019 05:39 AM

Any other ideas guys gonna have another go today swap motors around etc so ****ed off with it can't take it to no one as no one touches it and just a pile of wasted money need a miracle this has been going on for to long:mad2:

itsid 10-24-2019 06:27 AM

No worries..
we'll talk you through this.

Do us and yourself a favour and disconenct ALL of it ..
completely remove the controller from the batteries switches and the motor.
Once done..
please add a photo with all connectors spread out sitting on a desk or the floor,
so we have a picture we can easily point on a single connector/wire without any background mess.

If you have any controller manual that came with it, attach it to your next post as well,
there are some minor differences from manufacturer to manufacturer..
In case you don't
just number the connectors in he pic and tell us what the sticker on each one says
(NOT what you read it as.. just what it says on the sticker... when in doubt post pics of each)

A fresh start is the quickest way to solve that mistery.


Tony86 10-25-2019 05:45 AM

48v 1800w
2 Attachment(s)
I have it all on the table I have noticed no power going to braking have no volts, I'm sure it should say 5 volts ? Going to check the other controller and motor see what they say, also my pedal has the voltage going through but when press the pedal I'm not having any voltage getting used through the pedal I thought it should loose volts when pressing pedal? But I also connected it to ebike testing computer and the light comes on with as hard as you press it So maybe in testing the pedal rong ???

itsid 10-25-2019 06:17 AM

but how was I vague about my request

please add a photo with all connectors spread out sitting on a desk or the floor,
so we have a picture we can easily point on a single connector/wire without any background mess.
one connector completely obscured by one other,
everything still connected for some reason
throttle connection taped to be undiagnosable
wires flying (thanks to them still being connected to stuff)
from left to right and front to back

When I now say check the third red wire from above
what would you do?


But let's start with what makes me feel uncomfortable the most in that pic..
what's up with the insulationtaped yellow/black(brown?..can't tell)
And how is the throttle connected, why is the grey wire cut and taped away
[supposed to be on the throttle connector IIRC]?


Functional Artist 10-25-2019 07:00 AM

1 Attachment(s)
...disconnect everything
…spread all of the connectors out separately
...number them
…& then list, by number, what is labeled on each connector :cheers2:

Kinda like in the pic below :thumbsup:

* do this for each component
...etc. ;)

Tony86 10-26-2019 02:23 PM

48v 1800w
6 Attachment(s)
If you see my paper in images I have checked all voltage aswell I hope that's enough I just don't get it anymore all volts going through not an expert with the multimeter maybe there's some extra checks ? There's no power getting drawn from the battery when pedal getting used maybe? I I'm going to do the same checks on the other controller and motor but fear they will be the same results as the last will do another pieace of papper like the last hope that was helpfull thankyou

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