Yes they have both. Two wires, one for running lights & one for turn signal.
The base is grounded to the chassis through the housing.
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68 GTO 4-spd Convertible
78 S/E Trans am L78, WS6 Auto
78 S/E Trans am W72, WS6 Auto
79 10th aniv W72 Trans am
80 Indy pace car Trans am
89 Trans am GTA
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