Ole Farmerbuck
Addicted to ArboristSite
I bought a 1990 1/2 ton chev 4x4 yesterday. Nice pickup. Put a new alternator on it and was showing charge just fine till i turned on the lights. Made it show discharge so i didnt think it was charging. I noticed the lights are bright so i hooked up a volt meter on the battery, It showed almost 15 volts. But with the lights on, the volt meter in the pickup shows only about 8 volts and the gas and oil pressure guages also start going down. All the time the v meter on the batt is showing about 15 volts. When i turn the sig light on, the inst lights dim everytime it blinks. Any help? Also, if i unhook the battery the moter starts slowing down. I know with the older alts we can run out irrigation engines without batteries. Maybe not with these later style alternaters?