am working on a 90 silhouette. had the alternator rebuilt and after putting it back on.. the guage shows only 11.50 volts. and after testing it with an voltmeter it still shows only 11.50 volts. is it possible that the ecm is bad. or just a bad wire connection. / help.. asap.. thx.

It coud have been a bad rebuld,I had that problen before.Return it where you bought it an get another one.ask if you can have the "new" rebult alternator checked before you install it.Goood luck...Diesel 1954