oil change and service light

[a.12912]

hi

I had gone about reseting my oil change and service lights.

the method that i used was to simply short out service pins 7 and 19 from memory. the method had turned the lights of.

my concern being is that since doing so when switching the car on at second ignition position all green lights come on then off bar the first one (which rarely comes on at all now) with engine running , the odd occasion the fist Green light comes on with the rest of them at second ignition position ?

since covering about 3k , k's no lights have started to stay on at all reminding of a service. ?

when should the lights begin to stay on or have i bugerd something up , say extended the service period?

1990 318is