Bachmann class 37 light problem

[blueeighties]

Good morning. I have just fitted a bass reflex speaker in the tanks of a Bachmann class 37. This requires the removal of the in fuel tank light switches and wiring. The last time I did one of these I made the following alterations to the wiring to obtain correct light operation.

 

On the Bachmann pcb...

Added Jumper leads between tags  1 and 2  (Tail lights no 2 end)

                                                        3 and 4   (tail lights no 1 end)

                                                        5 and 6   (cab lights)

 

Now then this time, I have the headlights on at no 1 end, and the tails at no 2, and nothing else. They stay on regardless of direction. Obviously this one is wired differently, but I don't really know what to change. Has anyone any ideas?

I should also add the chip is a Zimo MX664D sound chip.

 

[250BOB]

I found it simpler to leave the switch wired up, but move it up into the body of the loco....there was space available as the speakers are now in the tanks.

Bob