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Old 03-14-2010, 10:38 AM
mobenz's Avatar
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Join Date: Sep 2006
Location: SW Missouri
Posts: 103
All electrical gone!

Started the 1978 300 CD this morning, and a couple of seconds later, all of the electrical went dead. Motor was still running, but no lights, radio, nothing. Turned it off, and tried to restart, but it was as if the battery had been removed. This is the same vehicle that I have posted about recently where the high beams blew, and the heater blower fuse kept melting. We have tried to clean as many contacts as possible, but obviously there is some other gremlin we have missed. HELP!

"If we can't have fun while we're here, we might as well go to the house".

1978 300CD
1985 300TD
1999 Land Rover Discovery II
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Old 03-14-2010, 11:55 AM
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Join Date: Sep 2001
Location: central Texas
Posts: 17,281
You need to look at the electrical ' tree'....and
start cleaning on the GROUND side... starting at the negative battery terminal... and taking all wires off and cleaning with brass brush or something like that...
ALSO.. cut the wire insulation at the ends of the battery wires to see if corrosion has attacked them..
faulty grounds cause excessive current draw and can cause this type of thing..

But also check to see if you have a broken battery post...
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Old 03-14-2010, 12:36 PM
JimFreeh's Avatar
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Join Date: Mar 2007
Location: Hampton Roads, Virginia
Posts: 3,366
As above, and also, ground paths can check ok when checked by a meter, but still fail under load.

I had lots of heartache and angst with my 250C that had a bad ground cable from the battery to the chassis ground, checked out ok with an ohm check, but failed under load.

14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles
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Old 03-14-2010, 01:12 PM
fruitcakesa's Avatar
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Join Date: Jun 2008
Location: Vermont
Posts: 1,143
x3 on many gremlins bad grounds are the problem.

1981 240D 143k 4 spd manual -SOLD

2004 VW Jetta TDI 5 speed 300k -still driven daily
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