what elec. circuit affects that capacitor on ecu for 92 civic? on 1992 Honda Civic

was here a few weeks ago with problem of car not starting but was cranking. raiderron figured out the problem. ecu was bad. thank you raiderron. now we have replaced it and the capacitor blew in new unit. which circuit affects the capacitor enough to make it blow so quickly?

Asked by for the 1992 Honda Civic
need to start with voltage ck on circuits. is alt over charging? should be no more than 14.2 volts
have no blown fuses any where ..........which circuit should i start with? and can these tests be done w/out car running and ecu blown?
1 more answer , 1 more comment
Did you put a new ECU in the car?
yes........immediately blew capacitor in new ecu........still did not start