Hobber wrote:...
The LED circuit diagram(Don’t let this scare you – the steps are below in English!)
Steps in English
• {skipped a few}
• Other end of red wire connect to + ve leg of LED 1
• Blue wire connect from –ve leg of LED 1 to +ve leg of LED 2
• Black wire connect from –ve end of LED 2 to the resistor
• Black wire connect from resistor to a second male connect tab – make wire long enough to reach back to the harness plug with some to spare.
...
So my particular vehicle already has illuminated cupholders, so I'm really here just for curiosity's sake. But I'm a little confused by your choosing to run both diodes in series.
When I look at your circuit, I see a problem when, in a few years' time, when an LED does eventually blow, both will no longer illuminate.
Wouldn't it work better with both lights in parallel, so excuse my crude circuit diagram (I don't have access to a visualisation program on my phone), like so:
{+}—{R / LED 1}—{E}
\__{R / LED 2}__/
Where R is the resistor appropriate for the application, + is source positive and E is negative earth.
Otherwise fantastic walkthrough, and I might be using it to do the blue->red LED mod further down the track...
Cheers,
Crampy