Anyone done this?

Greggbear67

Forum Member
Problem is you have to run back and switch over,better to have a dash swith going to a relay or red signal wire at altanator switching automaticly the relay over,then use the man dash switch to connect all up if a starter battery fails.
I intend to fit the isolator inside the cab where it can be operated from the driving seat. Relays etc are just more complication that I'm trying to avoid. One big heavy switch seems like it will do what I want it to without any drama...
 

Squiffy

Forum Member
As I suspected, as I said you have to bare in mind the amount of current draw of the starter motor, fine if starter battery is fully charged but if flat all the amperage will be drawn from the liesure battery and 80 amps will not be enough if the engine is cold. Cold crank on a Ducato will be around 180amps could even peak at 400amps on initial crank though I haven't checked that fact but it will be a considerable amount. Phil.
 

Lord Lucan

Electrickery progress
IMG_20191019_142617.jpg
 

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