Yep. thats my concern. All that we did was add the D250SE to the smartpass. Nothing is connected to the output consumer at all. So maybe its related to this recall issue somehow? Autoelec is looking into it at the moment.
I hope you've never made a joke about Lucas electrics!
You must disconnect both batteries when installing the CTEK250SE. That must have caused a short, a big one.
The install was done by a very experienced autoelec so dont think that caused it
Probably not, but everyone is entitled to a bad day. I have to think your sparky would own it if he caused it. That's a LOT of brown smoke to hide.
The circuit needs power to blow the fuse. No power no blown fuse. So the circuit had power or there was an accidental short between exposed terminals.
What about removing the Smartpass altogether and just running the D250SE.
As someone who has multiple classic English cars I have lost count of the number of lucas jokes.
As I understand it, the Smartpass will also connect the second battery to the main for additional power when required (ie. winching or a flat starting battery). This is not possible with a D250SE as its primary function is to isolate the auxiliary battery from the main and ensure that the auxiliary battery is fully charged. The primary function of the Smartpass as it is connected in the IG is to provide a backup to the starter battery and connect both batteries so the alternator can charge the auxiliary battery.
It is more flexible than that. The user can power accessories off the second battery if they choose.
Yes, this is the way they used to do it many years ago, but with battery technology and monitoring it shouldn't be an issue. You can still jump the Grenadier by bypassing the D250.
I'd wondered about if would contribute during winching, nice to have that confirmed, thanks.
Absolutely could power accessories off either, but the reason ive bothered with dual battery systems (never CTEK before) is to isolate my primary battery from everything else. I want my primary battery to serve the truck, and nothing else. I want my secondary to supply my accessories and 'nice-to-have' items. A secondary can always be used to support the primary, through a function of your isolator or hardwired with an interrupter, or jumper cables if you prefer. I havent seen a real wiring diagram (see Jeans posts) to know what is supplied by which battery (such as the ineos installed wiring to roof lights and foot wells). It would seem like poor planning to me to have the vehicles background functions supplied by the primary, and than have ineos tell us to please also use the primary as source for accessories, but dont worry because you have another battery. It would also seem silly for me to add accessories to the secondary if it risks drawing down both batteries. The ctek devices sound pretty slick reading through their website and manuals, but im sceptical of this arrangement, without understanding the rest of the wiring, or the rational for their blocking off the smartpass feed.
The CTEK Manual sets out in detail what the combined units can and cannot do.
The manuals from CTEK well describe their functions and i understand how they work. They are not my concern. I dont understand how Ineos has wired their truck, and without that information, their dual battery arrangement is odd at best. If essential vehicle functions are supplied by the primary, then i will not be supplying accessories from the primary, because i just really dont want to reset the clock when i forget to turn the lights off, and having a security system attached to a battery that can be drained is stupid. If the ineos supplied wiring for accessories is from the primary, then i dont want to attach my accessories to the secondary because having accessories attached to both batteries is again, stupid.
I think nothing is connected only to the secondary battery, nothing
Without more definitive information my take is that everything is wired to the primary battery. The second battery appears to be for supporting the primary battery when it no longer has enough power to start the vehicle.
