Can you give me any details on the signal itself, like voltage levels or correlation to speed? Also, does the signal come from the rear axle or the right front wheel (your message said the one connector is for the rear axle RPM sensor harness connector, but also said another one comes from the right front)? I'd prefer the front, as I do sometimes spin the rear wheels (believe it or not), which would result in an inaccurate measurement.
Also, what's your take on whether or not tapping into the harness would void my Starmark warranty? My car is scheduled for a bunch of seal replacements next week and I'll probably ask the guys at the dealership about this while I'm there.
Silverphile Bleifuss Motorsports
'07 E350T 4MATIC, 122k miles
'99 E320 4MATIC, 248k miles
'97 C36AMG, 226k miles (gave to son)
'94 E320T, 217k miles
'94 E320T, 251k miles (RIP)
'92 Coachmen Van Camper, 142k miles
'84 300TDt 336k miles (RIP)
'84 190E-2.3/5spd (Stage Rally Racer)
'66 230 W110 Sedan (Barn Find, Future Vintage Racer)
'64 Plymouth Valiant V200 Convertible