(800) 853-2651
SHOP NOW

O.T. Alternator question Toyota

I

Idaho Ron

Member
I have an 88 toyota truck. It has a new battery and the alternator was rebuilt under 10,000 miles ago. I get 14.5 volts when the truck is running.
My problem is if I leave the truck sit without starting it and the battery discharges. As close as I can tell it is about .3 to .4 volts per 24 hour time period.
I took out all the fuses under the hood and the battery still runs down. I asked a friend and he said on chevys some alternators will drain the battery when they go bad. Has anyone heard of this? Ron
 
Disconnect ALL the wires from the alternator (tape any exposed ends for safety), let it sit, and see if the battery still discharges.
 
After disconnecting the alt. wires, use an ammeter in between each wire & where it attaches to the alt. Check current draw. My guess is a shorted diode or regulator bad.
Do you have a replacement alt. to sub in & try?
 
You must log in or register to reply here.

Similar threads

S
Yanmar Alternator Not Charging
Replies
5
Views
351
hearnc843
H
T
How do I drain the radiator and engine block?
Replies
6
Views
512
caterpillar guy
C
B
555C Alternator Failure
Replies
2
Views
405
Bern
B
super99
super88 update
Replies
14
Views
788
GermantownGreen
G
K
5500N alternator question
Replies
2
Views
480
Tx Jim
Tx Jim
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top