A $2 relay (free at any junkyard) will solve this problem. The Fiero switch mounted on the column switches the power from one set of lights to the other (high and low beams). A single relay hooked up to the power supply of the switch, and a single wire added to the circuit will isolate the circuits between the high and low beams, yet pair them when the high beams are turned on. This will cause just the low beams to come on when the headlight switch is turned on (like normally), but when the high beams are selected both high and low will light. On the Fiero, you have to switch between the two (either high or low), but the with the relay installed allows for all 4 lights (2 high, 2 low) to be on at once.