On my 1984 I have a rocker switch labeled "ICC Blink", when headlights are on, this blinks the running lights. Don't know whether it works when just running lights are on.
If you want others to be happy, practice compassion.
If you want to be happy, practice compassion - The Dalai Lama
1984 310 Limited Motorhome
Courtesy Parking (W/S/E/Wi-Fi) on I-5 in Northern California, 70 miles from Oregon border