Michael: I can only offer generic thoughts, but my 1955 has a small, bare flexible cable connected from the right rear of the block to the firewall. I think this is fairly common. Checking for a bad ground should be easy with one end of a jumper cable connected to the ground terminal of the battery and the other to a good bolt head on the body or frame. If this instantly restores the system, perhaps you do need an engine-to-chassis ground cable. I believe there may be a firewall plug connector for everything in the dash. These are often referred to as problem areas, necessitating removal, cleaning and packing with conductive grease. And, of course, removing each battery cable connection and cleaning the cable ID and battery OD always makes sense. Corrosion is not always evident from the outside, but is often present. After cleaning, purchasing and inserting the little red and green felt washers with anti-corrosion chemistry under the connections makes sense, as does coating the cable connections with grease or special protective spray to prevent further corrosion. The battery may also be on its last leg and due for replacement. MoPa'r to ya, C-300'ly Rich Barber Brentwood, CA 1955 Chrysler C-300 (6-Volts-positive ground) -----Original Message----- From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Michael Reed Sent: Sunday, August 12, 2007 9:37 AM To: chrysler300@xxxxxxxxxxxxxxx Subject: [Chrysler300] Sudden Electrical Losses Three times, the most recent yesterday, my "F" has experienced a total electrical loss -- no power to the ignition system, starter, power windows, lights -- nothing. No power to anything -- as if the battery had been disconnected. The only thing that I can come up with that would cause this is the (temporary) loss of the ground between the engine and the chassis/body. The negative battery post has been connected to the engine since I purchased the car 28 years ago. Can anyone give me some advice as to where and how the engine is grounded to the chassis/frame? Somehow this connection is being lost. If the car is allowed to sit for minutes, or a half-hour or so, the connection is miraculously restored, and everything works. Difficult problem to even try to track down when a failure can't be forced. Unless... I am misdiagnosing these events. But I don't see how it can be anything else... Can anyone give me some advice as to where and how the engine is grounded to the chassis/frame? Somehow it seems this connection is being lost. If the car is allowed to sit for minutes, or a half-hour or so, the connection is miraculously restored, and everything works. Mike Reed in Lake Odessa, Michigan [Non-text portions of this message have been removed] To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/ Yahoo! Groups Links To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: mailto:Chrysler300-digest@xxxxxxxxxxxxxxx mailto:Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/