Wizzo said:Someone please help
But i dont know what resister it is and how to test everything around itcalab said:Replace the resistor, check components in and around that resistor
Try to get it going
If not, buy a non display generic controller and ride.
calab said:If your lucky you can read the color code or measure the resistance with your ohm meter.
More ways of luck is to find someone who has the same controller as you.
Troubleshooting can come down to just being an art form.
Wizzo said:looked up my multimeter and am using right setting, and getting no resistence at all
Blacklite said:Wizzo said:looked up my multimeter and am using right setting, and getting no resistence at all
Nothing has no resistance. Do you mean is it's reading as an open circuit, which is actually infinite resistance?
fechter said:No reading indicates the resistor is burned out. Now, we need to figure out the correct value to replace it with. The typical 7812 regulator has a maximum input voltage of around 35v, so the resistor has to drop the battery voltage to below this, but above 15v. Typical control circuit current is around 0.1A. Without running it and measuring, it will be a guess as to the actual current. My guess will be around 480 ohms. The physical size of the resistor needs to be large enough to dissipate the heat. The original one was maybe too small.
How come the person above is saying nothing has no resistance? I'm getting more confused now
Say this in lamans terms please. So the resister is burnt out.? I don't understand the paragraph above that tho.Blacklite said:How come the person above is saying nothing has no resistance? I'm getting more confused now
If your meter isn’t giving a reading it means it’s an open circuit, which I was pointing out is actually infinite resistance not no resistance. The meter isn’t reading anything because the value is too high for the meter to display. No resistance would imply a perfect conductor, something that doesn’t exist.
The practicality of this is the resistor is burnt out as fechter wrote.
Watch this video. Notice when he first calibrates his meter, he shorts the two probes together, and the resitance is 0 ohms. That's because a Short is zero resistance. There is still resistance in the wires of the probes, since there's nothing with no/zero resistance, which is why meters need to be calibrated to take into account the small resistance of the probes.Wizzo said:Say this in lamans terms please. So the resister is burnt out.? I don't understand the paragraph above that tho.
I am trying to learn soz, I will desolder it off the board and check then, this is my hobby, I'm not a qualified electrician like you sound you are. Then I should know if there's a short on the board, and get a more accurately reading. Yes? The digital meter he has is same as mine, so will watch and follow it when I get home. ThanksE-HP said:Watch this video. Notice when he first calibrates his meter, he shorts the two probes together, and the resitance is 0 ohms. That's because a Short is zero resistance. There is still resistance in the wires of the probes, since there's nothing with no/zero resistance, which is why meters need to be calibrated to take into account the small resistance of the probes.Wizzo said:Say this in lamans terms please. So the resister is burnt out.? I don't understand the paragraph above that tho.
https://www.youtube.com/watch?v=aJ_4Xb_fOCA
Notice after the calibrates, he unshorts the leads. Now the meter reads infinite resistance. That's because an open circuit can't conduct electricity, except whatever can be conducted by what's between the probes, in this case air. I suppose if you had some really sensitive equipment, the resitance might not be infinite, but very very high, if some electrons could be conducted through the air.
Bottom line, short circuit is zero/no resistance; open circuit is infinite. So when you make a statement like "but getting no resistence on any settings?", then we don't know what you're talking about, when you don't know yourself. (I was surprised you said no resistance, since I was expecting infinite resistance when I saw the pic)
What I've replied first is what your saying then. Thank you for explaining it better to me. How do I know what voltage resister needed tho if your saying between them voltages?fechter said:If the meter doesn't change when you put the probes on the resistor, it means the resistor is burned out (infinite resistance).
If you replace the resistor, it might burn out again if something else is shorted downstream. You won't know until you try it. My wild guess is around 500 ohms, 2W. Once you replace the resistor, you can measure the voltage (from battery negative) on each side of the resistor. One side should show pack voltage. The other side needs to be between 15v and 35v. If the voltage is too high or too low, you can change the resistor to get the right voltage.