Tried with a domestic truck. No pair, and after trying on 2 different domestic trucks, I decided to just hard wire.
Coding appears to be totally OK, as all lights and various stuff works.

__________________
'10 X5 35d- 279k mi, deleted and DUDMD stage 2, daily and tow vehicle
'01 330i- Drift car: SLR Super angle, BC coils- keep it simple
'07 335i 6mt - Sold @ 171k miles- stage 2 daily commuter for 2 years