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With meters and voltage scales you have to under stand what you are trying to effect and how the scales work. Like wise with taking battery voltage readings it's all dependant on how and where you place the probes and take the readings from. It can take a lot of understanding but once you have...

You do my test on the 20v scale and vfr's test on the 200v scale as the voltage reading is different. My way one gets individual 3 figure readings of less then 5v, with vfr's way you are using the main pack B- so you get a rising accumulated reading each time so need to use the 200v scale.

Ignore my post as it is may sound too complicated too follow. You haven't read it properly I don't tape the needles to anything, I place tape on the needles leaving only the eye and about 8mm of the point exposed. One places the needles in the pin outs as they ae thin and easier to get a...

The switch could be for the BMS as one cna buy them with switch output.

How are the lights wired ? Try disconnecting them try again.

Yellow and Green are/should be RX/TX they send comm's back and forth t between controller for compatibility, Blue is/should be 5v switching supply. Test the controller phase for mosfet damage with a resistance/ohms test. BlownMosfets.cdr (ebikes.ca)

It won't the controller needs an input signal for it to do so, so either one from PAS or throttle. The obvious and most likely one to cause an issue is the throttle.

GH like your other trusted steed aka the supersub/david, the Yamaha has served you very well and you have to admit you have been fortunate with getting a free new motor and managing to diy repair the battery when told it was scrap by the dealer. Not every owner will be so fortunate or have the...

This will be more of an issue as time goes by lots of folks are wise to the shady mid drive close systems and sell their bikes when the warranty nears or passes as they then can become an expensive ornament. The back up and service from brand dealers is expensive, as has been mentioned PLB in...

Use a Dremmel and route out/modify a standard magnet ring ?

Move the dial in the pic one click to the right to 200v and not all the way to 200v AC past the 12 o'clock position.

Not correct, wrong scale. One can use vfr's way or if you want three figure readings in the 3 or 4.xx way follow the route below. One can also measure differently so that yo get 13 individual readings in the single range of up to 4.20v each which will give a better accurate reading of each...

For BMS pins measuring each one against B- use the 20v setting it will give a more accurate reading like 3.86 as an an example. If you use the 200v setting it will simply read 3.9v as it will round up. For the charger pins you will use 200v setting.

No going mad Pete, it's hard sometimes making someone see sense. Some tbh shouldn't be playing with fire. The OP has no idea what has been done to the scooter except the battery isn't the usual one, that doesn't mean the seller either knew much of what they were doing.

It is an in house customer spec made one, likely from one of the many 100's of far east electronics companies, doesn't look like a normal brand we see. The three x 3 pin/wires are or could be speed sensor, throttle and PAS. Connect a throttle in turn to each wire ensuring you get the 5v/Gnd...

The capacitor will self drain/discharge slowly over a period of many hours. To get any real shock off DC you will need higher voltage say more then 80v. If you lay your bare arm across a battery cell pack of nominal voltage of up to about 60v you will get a slight tingling sensation, when you...

I concur with Pete, from what I see the 2nd pic is a DC jack charge point 5.5mm x 2.1mm or 2.5mm. The pin in the middle is V+ contact and the metal barrel inside is the V-, in side the Black wire you talk there are two thinner wires (one Red/one Black) the outer is just a pvc sheath. It isn't...

I assume you mean balance not conditioning, I have lipo balance chargers and psu's for lipo's. None of the parameters condition the packs. All li-on ebike batteries have an integral BMS so there is nothing else to do except plug in and charge, if you wish charge to storage level if not using...

Disconnect the throttle and switch on, if no surge then you will have a wire fault likely on the throttle signal line. The fault is likely a broken or intermittent wire contact, wet has got into the throttle or could be bridging a pair of pins if a waterproof connector. There are only two...

Does it have a throttle fitted ?