Hello Kevin
First thanks for serial no, now I have picture about your BDI and I must to tell you that I was wrong inform you.Your BDI is older unit and have relay inside and you can bypass him on contacts,so you are think good.Of course If him dont show you batt state you will lose hydraulic and I am sending you picture to see solution for your problem.Tell me did you finish problem and if you need more help.Good Luck

Thanks Nemanja
My truck serial number is 80 344 989.
I understand when you mention canbus system.
My BDI doesn't work because it got wet but the tilt and sideshift are working so that must mean the BDI is still working but not displaying. I will test the wiring from the potentiometer to the controller and if it is ok i will have the controller tested
Thanks again
Kevin

This original BDI have only one wire because it is can bus BDI and dont have two wires and switch inside.When I said can bus you know that via can electronic communicate with BDI and given info about Batt state shut down hydraulic via this wire.Please send me serial no of forklift so I can look again but I was look Efg with zapi units and BDI with small display and dashes from top to bottom for batt charging level.Is that BDI on your Efg?
I was also try one time to bypass this BDI and so that is it not possible,only change.

Thanks Nemanja.
If I still wanted to try bypassing the BDI which other wire would I connect wire 3 to.
Thanks
Kevin

you have hydraulic function and that is good you dont need to short BDI because BDI turns off total hydraulic when is battery low,to save power in battery till you go on charger.Your problem with slow hydraulic is somewhere in wiring potentiometer for first function or electronic unit and you look that part of truck.I was look this vehicle and on BDI pin 3 is for hydraulic if you still want to try.Good luck