My flood title 2001 Lexus gs430 isn't charging the battery, I just replaced the alternator and it still isn't charging. I know there is a little plug near the top of the alternator and I am in no way confident in that connection given how grungy it is, but I don't think that would stop it from charging the battery completely. should I try to patch those wires or is the alternator junk again? If I should repair said connection what tools/ wire size should I use? (all the fuses are intact and working, this is part of the connector im talking about, https://www.bmotorsports.com/shop/pr...oducts_id/2290, the two main connection points on the alternator are relatively clean and i am confident in them.) any help appreciated.

 

Is the car dying and the only solution is using a battery charger to recharge the battery? Or is it having trouble starting? Or is the only issue a battery light on the dash? I always recommend getting a new alternator tested before installing it. Although it’s not uncommon to have a problems after installing a new alternator. And the. U find out there wasn’t a problem with the original alternator but a problem with corroded battery cables. If the car is running fine, and u just have a light on the dash, that could be a damaged alternator plug, pretty common on these vehicles. If it’s a charging issue, and the car keeps dying and having 0% power left in the battery, then it’s an alternator or cable.
i would get a pair of jumper cables and run a cable from the alternator positive output to the positive battery terminal and then run the other cable from the negative battery terminal to the engine block. If this solves your problem, then you have a battery cable problem and you can solve it by connecting a good 4 or 8 gauge cable to the + output on the back of the alternator and run it directly to the + terminal on the battery, and then run a similar line from the - bat terminal to the chassis, there is a ground point on the firewall just to the right of the battery, above the intake manifold and an alternate about 24” away from the battery, on the inner side of the passenger fender. It’s just before the alarm horn. And then run another line from the chassis to the alternator. Make sure to clean up the ground points so u have good metal to metal contact. It’s basicall a “Big 3 upgrade” and there are plenty of places to learn more about how to do this correctly.