Both headlamps blew at the same time ?

I had my wife keep an eye on the meter while I play with the wiring under the dash. I was reading the schematic and followed the under dash splice and saw a black wire going to the headlamp switch. soon as I grabbed the harness close to the switch the voltage dropped down to .25V, I let go and it went back up to 1.2V and stayed. I was able to get the voltage to fluctuate by messing with the headlamp switch connector. Nothing happened when playing with the bulkhead connector. Voltage was 12.5 going into the bulkhead and 12.5 coming out.
so after all this I decided to start the car and see what my output voltage was and it was at 13.7 at idle, and 14.01 at 2500rpm. Not sure what the hell I touched but the alternator output appears to be back to normal, but still have 1.2V drop on ignition harness ...... DAMN THIS !!