1990 535 4 door

[drive-ability]

I have a neighbor who has a 90 I believe its a 535. He has a problem with one side (driver) concerning his park lights. They don't always come on and when they don't the dash indicator lets him know by flashing some warning etc. The bulbs are new etc. He has a remote key-less entry as well which also will flash the park lights and the problem is present using that system as well. He flips the light switch on and off a number of times and the light will come on. There must be a lighting module some where in the mix,
Has anyone had experiences like this?