Motorolas don't go bad very often. Here's the ritual to perform before condemning it. 1) Change fuse #5. It is the 12v feed for the instrument cluster. Any resistance at the fuse results in a lower reading. 2) Check the battery connections, especially the ground. 3) Check the battery ground at the other end, on the RH trailing arm bushing. 4) Check the other grounds. The one at the LF of the car, the one at the RH engine mount, and the one that goes thru the rear bulkhead behind the coil cover. 5) Re-confirm a low reading with a multimeter at the B+ post of the alternator with the engine running. Use the engine as your ground. Good alternators will deliver 14V just off idle. We have rebuilt Motorolas, part #110101R, $295 exchange. These have the correct HD regulator and are warrantied for a year. Warren at DMC ComposerZelgadis@xxxxxxx wrote: > Hello, list. Not quite sure where to start with this one, but it seems that > my car isn't producing enough electrical power. At highway speeds, > headlights and air conditioning OFF, I'll show 13 volts, sometimes a little below. 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/ <*> 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/