I need a strong "battery plus" (= 13.7V approx.) signal to power the DTRL LED lights. So contact 87 on the ignition relay was perfect. If you happen to only find a "weak" signal (I mean on any other car, e.g. a signal coming from the stalk switches), use that signal only to open a relay, which then switches thru a battery plus signal coming from the battery. But I am happy with contact 87, which makes things a bit easier.