MBE 9A9 battery connection

[repsna]

I moved from 9A4 to 9A9.

With 9A4 I hat a battery master switch for the - chassis connection. This I also made for the 9A9 and faced the following problem: When switching on the battery connection the fuel pump started to run (without ignition 12Vswitched on) and when I switched on the ignition the pump started again.

 

Then I made some trials with the fuses and figured out that with battery minus connection A003 permanently and A004, 0055 and B114,115 with a master switch on the battery + side the fuel pump starts when switching the ignition key on (12Vswitched on). Would this be the correct way to connect battery and 9A9? Fuel pump is directly connected from the HSD. I am not sure because the 9A9 pinout specifies permanent 12V for A003 and B 114,5 as permanent and A004,5 as 12Vswitched only(ignition).

 

in the pinout there is no ifno that A004,5 and B114,5 have to go through a master switch.

 

 

So I am not sure what is the right way to connect the 9A9

 

 

thks Hanns Pe

Edited April 3, 2020 by repsna