basic l.e.d. wiring

In principle: +12V - resistor#1 - input#1 - resistor#2 - input#2 - resistor#3 - PIC-input - resistor#4 - GND where input#1 & #2 each come thru their own "input" resistors. In practice it can be [input#1 thru resistor} and [input#2 thru resistor] to PIC-input AND a resistor to +12V or +5V and a resistor to GND. Maybe a reverse-biased diode from PIC-input to its +5V rail to prevent the PIC-input voltage exceeding +5V (or 9.7V etc). (And can add similar to GND in case of -ve voltage spikes.) Resistor size depends on input voltages and combinations (off, 1, 2, 1&2) and desired output (eg, 0V, 1V, 2V, 3V) though you usually set the programmed PIC input value/range to cover whatever voltages you end you with. Maybe just use 2 separate inputs for now. You can change it later...