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2000 Town Car. Random blinker clicking - where's the ground?
Blinkers work fine when turned on, left/right and front/rear, whether the engine's running or merely ignition on. When the blinkers aren't on, i.e. lever in neutral position, there's the sound of blinker -- uneven, not rhythmic, random but frequent -- but no lights flash front or rear. With ignition on only, there's some of it, i.e. several random clicks, but it then seems to stop or at least subside. With engine running, it's ongoing. In both modes it stops when brakes are applied, then starts up again when brakes are released.
Form what I gather, everything seems to point to either the blinker switch or the lighting control module being wonky. Before delving into that, a crucial thing to check, and in principle easy, is the ground: it can be subject to corrosion.
And there's where I'm stuck -- where is the ground, and how do I get to it? I've searched for diagrams and photos, so far in vain. If the problem is only that the ground needs cleaning up, I'd hate to have to take it to the $$$dealer$$$.
Anyone know where the ground is, and how to get to it?