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Power Strokes
7.3 Tech
Battery light flickering while driving
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[QUOTE="CurtisF, post: 42734, member: 829"] Just hopped in my truck a few minutes ago. Started fine, batteries are strong. Started driving and got about a mile from the house when I noticed the battery light flickering as I'm driving. So I made a u-turn and came back home. I noticed the light goes out completely at idle. Nothing. It only flickers while driving. With the engine running I yanked out my multimeter real quick and checked the power at both battery terminals. Both showed 13.95 volts. Checked at the alternator, showed 14.12 volts at idle. Checked other constant power areas such as the hot side of the GPR and IAH relays, both registered 14.0 volts at idle. I reformatted my hard drive not too long ago, and I haven't re-loaded AE yet. Guess I'll have to do that soon, that way I can hook up, monitor vehicle voltage, and drive around to see what my voltage looks like when the light is actually flickering. All cables are fine. I've checked those again today, and I've completely inspected those recently. So there isn't a wiring issue. Looks like I have another alternator on the fritz. If I replace it, that will be #5. Unless anyone else has other ideas I should check? I didn't expect to see such good voltage at idle. Every time my other alternators failed before, I could see voltage drop at idle. [/QUOTE]
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