Try replacing turn signal flasher
If the Third brake light is the only one working , it sounds like the multi function switch...aka turn signal switch...Just had the same problem with my 98 cargo van..
gosh with ur hands
if 4,6L Color is usually yellow or red egr - under manifold in rear O2 - rear back in axhaust manifold
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In the fuse box.
you have a bad fuel pump
Corrosion? Contaminated brake fluid?
The alternator is weak or the belt is slipping.
engine bay near battery
loose wire?
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Check the brake fluid level in reservoir.