batt light going insane why?is checked batt and alt both fine

[yam-nev-69]

finished doing auto to man swap everything is fine, but now my batt light is on dim and when i rev it high enough the light is bright and blinks ,every light in the car blinks with it, anyone know what the prob is checked batt and alt both fine

[jetroy240]

check first your alternator connections, if they are tight, no broken wires on the connectors & has 12 volts on the heavy positive wire & 12 volts at ignition "ON", on one of the wire on the connector terminal, you might have a bad diode at the alternator, sometimes charging is still ok , you need an alternator. Make sure all your grounds & battery terminals are tight.

[yam-nev-69]

got 2 new ground wires one from the batt to body and one from body to engine,same thing happening, put a mulimeter on it and stays around 15v doesnt jump around ,......lost

[yam-nev-69]

pnly starts blinking around 3000 rpm

[yam-nev-69]

ok just un pluged the big whie wire with the black plug that goes to the pos terminal and stops flashing but batt light is on

[jetroy240]

if the fuses are good, it's time for a new alternator, some stores, they can have it tested before you buy one, say like Kragen? normally, at a shop they can test charging system without removing the alternator. 15 volts is a little bit high , you want around 13-14 volts only. I'd say it's overcharging.


Modified by jetroy240 at 9:43 PM 2/24/2008