914 Gauge install

[ccain529]

Hey Guys!
I have rather a dumb question...well, er actually two.
I just installed 914 gauges into my 1302s. The tech article mentioned that I need to use "isolated 2 wire light connectors for my oil and generator lights and fuel gauge illumination". I was able to ground the gauge body and get the fuel gauge dash light to work. My Gen. and Oil lights however don't light up when I turn the ignition switch on, but my turn signal light blinks constantly without any of the outside lights flashing. I'm thinking that I've left off a ground somewhere allowing the flasher to energize...I dunno.
Did anyone ever encounter anything like that?
Also (again pardon my ignorance) how should I wire the Tach? I have 3 connectors: "12", "1" and "-"