I just last night, reach down from above, to tighten the nut securing the wire to alternator. It's an easy reach.
I see in post
#25, accessing through the fender well. In that post a replacement alternator wire is installed. Using aftermarket wire lug, without pins.
The wires lug has pins (locking blades), that secure it from moving once on the alternator. These these pins, keep wire lug from moving. Any replacement wire lug, should have the pins. Without the pins (locking blades), wire vibration, could loosen the nut. Which could result in sparkes. Certainly result in a short.
In this case last night, battery light was going on and off periodically. But only reported during turns, acceleration, stops & bumps in the road. Alternator was just replaced days earlier, with Toyota remain. Assumption was either loose battery clamp and loose wire on alternator. What we found, was signs of high heat on alternator wire at alternator lug. Which melted the plastic wire cover (found lying below on rack). Also sign of melted plastic on the alternators' wire keep, for wires lug pins and on wire sheathing/heat shrink of alternator wire. The wire lug was moving, not being firmly secured. The movement, must have been causing sparks. I attempted to tight the nut securing the alternator wires. It turned way to easy, an the stud just snapped off. We don't know, if a defective alternator with bad connection/stud or its nut was not properly torque during install. But we're sure, it was shorting/sparking created excessive heat. This can be a fire starter! It must be why Toyota uses a pinnable wire lug and a cap over wire.
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