[JP Noonan]

I had a 914 die on me, a PO used masking tape and an uninsulated bus bar to bypass the "interlock-relay". The wires chafted on the seat track and killed the car. When this happened the "G" light came on, but nothing, not even the hazards, worked.

So if the G light comes on I "guess" it is a short (of the +12 volt variety) if the car dies but the rest of the electrical system works, it may be the tach wire or a bad interlock relay.

Also, when the car dies, can you still hear the fuel pump? If yes it is probably the ignition system grounding out. If is dosen't work then it may be the ingition switch, or interlock relay.

No free lunch here, sorry. You will probably be spending some quality time, upside down and bent over, under the dash and buried in the engine compartment.