i just had the same problem. headlights would go out and if i moved the turn signal/high bean switch they would come back on. finally the lights went out all for good. i could use high beams if i pulled back on the lever, but that was it. i replaced the mutli-fuction switch and i was all set.
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89 GT AOD w/ shift kit, B&M rachet shifter, Trickflow intake, Crane (E-type) cam, 70Tb, 75MAF, 1.6 Rockers, Pulleys, MAC headers and H-pipe, Dynomax mufflers, K&N, 3 core radiator, white face gauges, custom interior, cobra R rims. 14.9 at 95.07mph with stock 2.73's.
89LX 2.3 Notch, daily beater!
MY89GT