You cannot properly measure directly the power going to the frequency valve. If it is buzzing you will know. DO NOT apply 12 volts directly. Sounds like now you should pull the alternator and have it bench-tested. If it checks good you have a wiring problem in the car. The radio will not work properly unless it has at least a full 12 volts on it. Check voltage right at the terminals of the radio and make sure it has a good, solid ground. For the record, all kinds of problems will happen if you do not have full system voltage. The Lambda won't behave, the alternator light should light (or maybe not), the radio will play dead, etc. Since you say this car has been "molested" top to bottom you will have to go over the entire electrical system including all of the grounds. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, mike clemens <rmclemns@...> wrote: > > First, thanks to David T. for his inputs on my offline > questions. > > Now, here's my questions----Is there any way to check > the frequency valve?? ------------------------------------ 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/dmcnewsYahoo! 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/