Report "1973 Javelin smoking next to Battery. Is it voltage regulator and how to replace? The car would not start so replaced the battery. Smoke was coming from a little round thing to the left of the battery attached with red to the battery. I would like to fix it myself as every Mechanic keeps it 6 mos as it brings in customers & then try to strong arm me to sell it to them giving a sad story how they always wanted one and crying when it leaves.. The Road Asst said it could be it, but did not know what it is. I am googling for a diagram and going nowhere so help would be appreciated"