Answers among the questions
________________________________ From: Gerry Archer <arche...@embarqmail.com> To: Mercedes Discussion List <mercedes@okiebenz.com> Sent: Monday, September 2, 2013 9:00 PM Subject: [MBZ] Alternator question '83 300D Sorry to interrupt this ongoing discussion about Rusty and Trent and Gary, but I have a question about the alternator on my '83 300D. There are three wires coming out of the alternator. Service Manual SM-1243 shows that the two heavy wires, same color, are common inside the alternator. It also shows that these two wires terminate at a buss bar on the right rear inside front fender. This seems unusual having two common wires originating and terminating between the alternator and buss. The only explanation I can think of is that MB is dividing up the 60 amp load between two wires instead of having one larger wire. This is the reason The manual also shows the battery connected to this buss but doesn't show where. Go to the fender ( passenger ) and look under the air cleaner/turbo stuff. There is a block there as you describe. Has a few wires on it. Includes the alternator and the feed to the soleniod coil on the starter if I am not mistaken... Seems like I could always find a way to crank the engine for valve sets there. Now there will be another lead that goes to the battery, probably hooking to the starter battery post but not sure. You have to trace it, physically. Can someone tell me where the wire from the buss to the battery connects to the positive battery cable so I can check it's continuity and clean the connection? Sorry, see above, I got carried away.. With the key on "run" there is 12v on all three wires to the alternator. With the key off, there is no voltage on the small green wire and still 12v to the other two heavy wires. It is a new alternator, but it still doesn't show 13.7v when engine is running 600 to 1200 rpm. The smaller wire is what feeds the light on the dash IIRC. So no ignition, no circuit. The alternator sounds a bit bad. It has a built in regulator, and should pop right up to 13.7 when you spin it up. What does it show?? Does it move up at all? Also, where is the ground strap from the frame to the engine/transmission?]] Again, IIRC, it's under the driver's right foot, so to speak. Braid/strap arrangement. Pretty obvious when you climb under there for a look. If the car is cranking OK, then it's probably OK too, since that's the return for the starter current. Be sure to check/replace all the fuses .. ( bless you Marshall, we miss you (c: ) Thanks, Gerry _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
