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Complete loss of electrical power 780 (clean the ground connections) 700 1991

posted by  FitzFitzgerald on  Mon Nov 15 14:00 CST 2004
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last visit: Wed Jun 25 23:15 CST 2014
[RELATED]

My first assumption would be the ground connections. -specifically where the negative battery cable terminates at the chassis ground and the engine block ground. Remove and clean both of these connections with a wire brush until the mating surfaces are free of rust, oxidation, and paint. They should look nice and shiny before you bolt them back together. -also check the two tether straps at the back of the valve covers on your 4-cylinder engine (right by the distributor and bolt to the firewall). They are a pair of flexible metal straps that tie the engine and chassis together for better grounding.

If your ground connections are corroded, it would also be worthwhile to clean your positive connections (at battery, alternator, and starter).

FYI, here's another posting that was just done on this subject for a V-6 engine (B280, as equipped in 760s and 780s).
http://www.brickboard.com/RWD/index.htm?id=876803

God bless,
Fitz Fitzgerald.
--
'87 Blue 240 Wagon, 249k miles.
'88 Black 780, PRV-6, 146k miles.






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