Join Date: Nov 2005
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Ivor's put his finger on it. If you had no feed to the underbonnet terminal but the in-line junction is sound; then the logical conclusion is that there is an intermittant problem getting the battery's power to the vehicle's systems.
Only a few things can be left. A loose or corroded battery terminal. [Possible..]
A loose or corroded main earth. [Unlikely, given the symptoms.]
Or the most likely [and strangely common on Scenics] - a fractured internal cell connector inside the battery. These can work happily for months; then some vibration or temp change causes them to move fractionally and whoops - no electrics!
There's a very good chance that it's still on the original battery. Even if it's the second one; if that battery has done more than four/five years, treat yourself to a new one. Not some aftermarket-rubbish brand, either. Get a proper one from the dealers.
Currently in Screwloose's garage:
Mountain Range 6x6