Throttle wiring

Mollusc

Just Joined
Jul 5, 2022
2
0
I have an unbranded throttle; it has 3 wires coloured black, pink and grey.
Are these standard colours for signal, live, earth and if so which is which?
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
21,079
8,616
61
West Sx RH
Black will be Gnd, but Pink & Grey aren't usual colours.
I would say Pink is 5v and Grey is Sig.