These are high beam filaments operated at a reduced voltage. There is some added resistor in a circuit parallel to the full intensity high beam circuit. VW used low beam filaments instead, and installed a "series resistance wire", a smaller gauge wire that added resistance (and consumes power by producing heat) to drop the volatage to the filaments in a second, parallel path. I suspect the NUMMI plant did something similar.
You'll need to locate a wiring diagram or schematic to determine where this resistor or resistance wire is inserted on your Geo-ta. Once identified and located, simply opening the circuit will accomplish the desired goal.
Note that the hand brake switch disable was not across all makers or model years. VW DRL for the 96-97 Passat did not, but the 96-98 Jetta did.