nah,
see my blink page on brake light.
the lamp has 4 funcitions.
brake lamp stuck on or flashing
1: hand brack on , or stuck or shorted switch.
2: brake fluid level , ditto, ditto
3: brake diff. pressure sensor shows failure of front or rear (they are not equal pressure)
4: RWAL is unhappy, pull codes per my page. NOT ABS ,its Real Wheel Anti Lock brakes ( NO FRONT !)
it has nothing to with trailer light wiring at all.
unless you have hydralic trailer brakes hooked to your cars hydralic trailer brakes, no , i dont think so.......