My '83 FJ60 has been steadily starting harder and showing lower and lower voltage readings at the dash. If I pull a battery cable while running she dies. So, I need an alternator or regulator. I seem to have an "integrated" alternator in that it's not fender mounted (but strangely still seems to be independently replaceable). It's the IC type. 1. I called around looking for a regulator (why a regulator? see 2.). Everyone wants to know if I have a 40, 45, or 55 amp alternator. I don't know, it appears to be an aftermarket from Orange County Amplifier; no Toyota markings on it. I'd prefer not to have to buy a whole alternator if I don't have to, particularly if it's just because I don't know how big mine is. How do I know which I need? Toyota wants me to read the part number off of it, which I of course don't have. 2. Is it really the regulator? I ran the FSM checks that seemed to point to the regulator, but there were indications that it might be the alternator as well. Is there a better fault isolation for this? 3. Can I even drop a, say, remanufactured Toyota regulator into an aftermarket alternator? 4. If I buy an alternator (I'm looking at toyota remanufactured if I do), will it come with a regulator? I've heard people say yes, and I've heard people say no. Thanks! I'm trying to pick up a hitch to tow some landscaping equipment this weekend that I'm renting, and I'm really hoping to not have to sit it out. I'm also hoping I can fix this before my battery completely dies from the stress.