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[gazzatron]

Hi guys, i keep blowing the alternator 1 maxi fuse, i noticed my battery was going flat every couple of days so jumped it and removed the positive cable and it died, that's when i checked the charging circuit and saw the fuse had blown. I replaced the fuse and it was fine on idle but 5 mins into driving the engine died and the fuse had popped again    I had jumped it from flat about a week before and noticed the gauge was hitting about 16v but thought it was because the battery was dead and it went back to normal after a while. im guessing either the regulator is shot or there is a short somewhere. im armed with a multimeter where do i start???

gaz

[bigjeepzj]

the regulator is part of ECU.
have you load tested the battery try ching it a charge on a charger overnight.

[gazzatron]

I put the battery on a slow charge and it still popped the fuse. The fuse looked slightly melted too if that helps. The battery was 2nd hand and not for a jeep as my original was dead.

[bigjeepzj]

put the multimeter on volts across the battery and get someone to rev the engine the voltage should not get much above 14v.if it does then the ecu has a problem.

[gazzatron]

Is that with a fully charged battery or even a flat one

[bigjeepzj]

fully charged

[gazzatron]

Cheers buddy I'll try that in the morning

[bigjeepzj]

if it's not regulating the you need
http://alternatorparts.com/external-voltage-regulator-high-output-alternator-kit.html