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2002 F150 4.6L V8 pulsing lights HELP

Old 10-13-2018, 10:09 PM
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Default 2002 F150 4.6L V8 pulsing lights HELP

Hey everyone,

so I have a 2002 F150 4.6L Triton V8 rwd.

i have a new battery and a new alternator

my headlights, dash lights, and dome lights pulse all the time when on. DRL pulse as well. They seem to pulse at the same rate as the engine.

The only code that i have pulled with an OBD2 is a vacuum issue in the gas tank.

any ideas what could be causing this issue? Thought the new alternator/regulator and battery would have fixed the issue but nop.

battery charges fine. No issues with starting.

pulsing only happens while engine is running.

Thank you.
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Old 10-14-2018, 06:30 PM
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Check all your grounds
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