adbacker wrote: ↑
Mar 19, 2018 2:42 pm
I concur. The toasted controller actually came as part of a 48v controller/wheel/throttle kit, so I'll have to go back to see if that line carried the battery voltage level.
To do that kind of damage, it would have to.
The low voltage regulators aren't capable of that kind of current before they'd burn out (or shutdown to prevent burnout).
However, at this point I'm just trying to figure out which wires I need to short (if any) to tell the silly thing to turn on. And yeah, I'm inclined to just permanently short the bugger together once I find it.
There is a single red wire that I think qualifies as the "fine red power door locks" in the seller connection diagram. It goes back to the VCC3 point RLT uploaded a pic of:
It still amazes me how things get mistranslated from Chinese to English, but that is probably the wire--usually it would be "keyswitch" or "ignition", but sometimes "lock", though how they get the phrase yours is listed with I have no idea.
I tried shorting the red to ground but still am not getting any action. I'm pretty sure I checked it for potential and it was at 0 volts.
That's why I said you have to connect it to battery positive (if it's the k / i wire). If you want to test without frying anything, connect it thru a light bulb (any household incandescent will work). Just hold the battery positive wire against the main screwbase of the bulb, and touch the k / i (powerdoor locks) wire to the tip contact of the bulb.
If the bulb lights up and stays lit, then most likely the thin wire you've got is not the one you want. If it lights fora moment or not at all, but the controller now works, you've found the right pair, and can just connect them together permanently.
If nothing happens at all, and controller doesnt' work, it's possible that the battery voltage short that melted throttle wires also shorted to the 5v line inside the cable, and passed back to the electronics in the controller and destroyed it.
Plugging everything in, I measured voltage at the throttle. If it was on, I'd assume there would be +5v between the supply and ground, but there's nothing.
You won't get anything there until you connect the k/i wire to battery positive, because that supplies the low voltage regulator with power to run.
What would the "low voltage" section of the controller likely be running at? If I locate the VRM, I'm guessing a 5v or 3.3v on the output side? Look for a wire connected near that output and short it back to ground?
No, nothing connects to ground to turn it on. As I said in the other post, the k/i wire would be connected to the battery positive, either directly or via wahtever switch you want to use.
If you search the forums for "ignition" or "keyswitch" wiring, there are a lot of posts that discuss it, some with diagrams and pics, if it helps. (but there's a *lot* of posts with those words, so it could take a lot of poking around to find them