How to troubleshoot a 12 volt alternator on the vehicle - TSB-1019

TSB-1019 alternator troubleshootingThis popular guide, which provides detailed instructions on how to trouble shoot a heavy duty, 12 volt alternator while it is still mounted on the vehicle has been updated. In a simple, easy to follow format this 2 page TSB (Technical Service Bulletin) will walk you through the steps necessary to find out if that alternator is functioning properly, of it it's time for a new one.

Click on the link below to download the file (pdf format)

Attachment description:
The information contained in this bulletin is intended for professional technicians who have the proper tools, equipment, and training to perform the maintenance described. This information is NOT intended for 'do-it-yourselfers', and you should not assume that this information applies to your equipment. If you have any questions regarding this information please contact our customer service department at:

Leece-Neville Heavy Duty Systems
a division of Prestolite Electric Inc
7585 Empire Drive
Florence, KY USA 41042

(800) 354-0560
(859) 525-8801