Yes, I had thought about that, but I'd rather avoid any kind of invasive surgery. This will be my "last resort" if I can't do as follows:

I would love to fabricate a parallel tap for this connector, using a pair of mating connectors with a jumper between them and the trailer harness tied in there, then I'd be leaving the original wiring and connectors completely unmolested and can pull the trailer harness out at a moment's notice.

Any idea where I can get a pair of these connectors, or where I can get the connector pinout for what signals are on what pins?

__________________
Robert Fini

'12 ML350 BlueTec, 111k
'06 E320CDI (x2)
'05 T1N Sprinter 2500/Pleasure-Way Plateau TS, 72k
'97 C36AMG, 325k (son's)
'94 E320T, 249k
'93 190E Sportline LE, 168k (daughter's)
'84 190E-2.3/5spd (Stage Rally Racer)
'66 230 W110 Sedan (Barn Find, Vintage Racer build in progress)