Voltage is a better measure of the capability of your electrical system than amperage (current). Amperage changes with load - turning on your lights, A/C, blower, wipers, and radio will increase the amperage in the system. Being able to tell if the voltage drops when load is applied tells you if your battery, alternator or voltage regulator needs attention. You can run over-voltage if your voltage regulator has failed, allowing your alternator to provide a higher voltage than the system can handle. -- Mike -------------- Original message from "daviddelorean" <daviddelorean@xxxxxxxxx>: -------------- > Just out of curiosity, why do DMCs (and most cars) have a gage that > measures the 'volts' of the electric system and not the 'amps'? As I > understand it, volts is the resistance in the loop, bascially how fast > the electrons are traveling thru the loop. Amps is the actual amount of > power in the loop. So wouldn't it be better to know the actual output > of the alternator? > > Also, in what instance would there be too high voltage in the system? > Obviously if your alternator died the volts would drop below 12, but in > what case would they go too high? [Non-text portions of this message have been removed] To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/