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alternator issue 22re

17K views 11 replies 4 participants last post by  matrix30  
#1 ·
Hi im having problem with my truck . the alternator seem not charging the battery i did few test i pull out the alternator bring to a garage they test it and say it charging to mutch around 18 volt he said so i assume bad ground or wire put it back on at the battery i got 12v so the battry reading and at the alternator terminal i got 15 volt so look like it working but not sending the voltage at the battery... i test ground from battery it fine like 0.3 ohm with the frame and the positive with the alt output and same like 0.3 ohm . could it be the alternator anyway ? any help will be very apreciate

thanks
 
#5 ·
i think the battery can be wrong i got that truck for so long never change the battery when the problem start didnt run the truck for few days wen i try to start battery was dead so i boost with my other car it start and i found the alt wasn t charging i had like 10v at the battery that time i charge the battery today and look like charge ok but no liquide inside i assume to have the alt reading anyway at the battery even if battery is wrong ?
 
#6 ·
First, you need a new battery, then you probably need a new alternator too.

a bad battery can kill the alternator. a bad alternator can kill a battery. bad wiring or connections can kill either or both. starter, connections, and battery too.

If the battery was dead in a few days of sitting, you need a new one. My cressida's battery was one of the 5 best rated by consumer reports when I got it...5 years ago. I can still let it sit (with the car hooked up) for 3+ months and have more than enough juice to mess around with it for a few hours and fire right up
 
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#7 ·
Lets start with some basics.
A good battery will be about 12.6V with engine Off and at least 13.8V with the engine running.
The voltage at the alternator output stud and at the battery positive terminal should be the same. If not there could be a problem with the wiring between them.

If you charge the battery does it hold a charge? does it go dead over nite?

Have you had the battery load tested, either in the car or on the bench?
 
#9 ·
most likely it a battery issu like i post b4 it a old battery always work fine untill last week when i try to start and didnt so i boost it and start fine but die becose alternator was not charging so maybe both are dead. never change those part on my baby since i have it. this truck is amazing viva toyota :)
 
#12 ·
ok problem fix was the battery look all good now i guess battery was really short remember this one . i got 12.6v at the battery when truck not runing and 14.6 v when runing

thanks everyone

my baby is back 320 000 and still cliking :)