I started having my headlights flicker while driving along with my cd player and figured it was the old alternator I got from my dad. It was charging fine cause the truck was never dead or short on power after sitting all night.
So I got a new alternator, no change. The weird is that it only does it while the truck is in motion and seems to lessen when the truck is in motion and out of gear. When the truck is not in motion idling it has no problem, I have tried stuff like wiggling every wiring harness, revving the engine, rocking the truck back and forth and even putting it in gear and loading it up against the parking brake. But not problem, doesn't start until it starts moving. Its got me really puzzled.
So I got a new alternator, no change. The weird is that it only does it while the truck is in motion and seems to lessen when the truck is in motion and out of gear. When the truck is not in motion idling it has no problem, I have tried stuff like wiggling every wiring harness, revving the engine, rocking the truck back and forth and even putting it in gear and loading it up against the parking brake. But not problem, doesn't start until it starts moving. Its got me really puzzled.

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