05/86 Alfa Romeo Spyder Veloce

I am working on a 05/86 Alfa Romeo Spyder Veloce
VIN# ZARBA5415G1038288

The lame factory manual for the 115 Spyder does not have color coding for
all the
wires in the chart shown on page 04-23. (Fuel Injection)

I am not getting any voltage to any of the the three wires coming into the
throttle position switch, and subsequently I have low power, the variable
valve timing device
is not getting a signal to operate.

I am unable to determine why this is without following the wires, which I
can't do without a properly color coded wiring chart for the L-Jetronic fuel
injection circuit.

Does anyone have an updated diagram you can forward to me as a PDF file ?

Thanks,
BRT