Originally Posted by sxrsil3nt
Yeah it's been jumpstarted but my father knows what he's doing there. I've actually had a vehicle where it was jumpstarted and they reversed the terminals. A small smoke show but the only damage to the car was that the radio quit working - pretty lucky I must admit.
The car runs absolutely fine except for when the battery line starts flashing and it eventually dies. Last night I checked all the connections and drove it this morning and all seems normal so far.
If I do start seeing it again I'll be inclined to believe them when they say the issue may be the computer.
Who's doing the work on your dad's truck? Toyota? An indie shop? An auto electric shop? Him? You? Is it setting codes?
Slipping belt won't cause a charging system failure, and you'd hear it. Crackling noise? I've never seen or heard an alternator that made crackling noises. Might be a short someplace? Maybe in the wiring near the alternator or in the connector. Do a close inspection with a bright light.
New or reman'd alternators don't just go bad and three in a row is kinda hard to believe. What failed on the 'defective' alternators? Batteries, especially, don't just go bad. An intermittent short might be a problem, tho, you would think if things were shorting out, the wiring would burn out. You need to find out what the charging system is doing--your dad may need to pay someone who knows fairly modern Toyotas to do the diagnosis & maybe effect the repairs. Probably less expensive than replacing an ECM, which may not even be the problem
My experience on Toyotas is >20 years old. In the 70's and 80's, the alternators were internal regulators, and regulators, diode boards, and bearings were available in the aftermarket. Mostly in those days, tho, the carbon brushes wore out, and easy and cheap thing to fix.