now!!!.... the 3.2 at the fuses is exactly half that should be there..hum....is half the ac cycle being clamped by a diode.ie controlled lamp shorted to gi lamp????     

memory trip back in school

you need to have both probes on the AC wires. you wont get a correct reading if you tie one to GND or the earth strap. the reason why i gave all the different points to test is to determine were the voltage drop is and to make sure you have the both probes on each of the A.C wires. . the process of tests i have been giving you is the same way i test for a low G.I. fault. 

I hope I didn't come across as rude with the above.