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Message: <blockquote data-quote="ummduh" data-source="post: 8428538" data-attributes="member: 616768">Having a bit of experience with that vehicle, I'd start with the alt charge wire. There is a fusible link on that by the starter solenoid. The fuisble link can fail partially. I'd probably start by just bypassing that wire all together with a big 3 style 4GA + fuse. You shouldn't be having random voltage drops on that truck, there's practically no electrical load in it. No electric fans.. Just a fuel pump, EFI and your a/c fan really. You've either got bad electrical connections, or...Second, stop buying electronic parts from autozone. My rule of thumb is unless it's a name brand that you can also buy elsewhere, and brand new, don't go to autozone for it. Don't trust any of their store brand junk.Third, you can retrofit a 130A alt from a 97+ F150 with the 4.2l V6, it's a direct bolt on.</blockquote>

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