Parking light grounding

[PbFut]

The grounding circuit is simple, but has areas that can fail. There are leads in the harness to ground the Radiator support. Black wire with eye hoops. One under the battery, the other is same position on driver side. It is not a bad Idea to run a jump wire from this same attachment point direct to the battery. The ground for the parking/turn signal lamps is via the housing attachment to the radiator support. You need to be sure that paint or rust inhibitor or corrosion is not in the way of a good connection. Bulb to socket, socket to housing via those metal retainer tabs around the socket, and finally the metal bracket that bolts to housing to the radiator support. All those contact points are potentails for a broken circuit.