Silverleaf

[cdat]

I've looked thru the posts here can't find an answer, called Newell, they couldn't tell me, nor could silverleaf. I'm trying to direct wire the jib for the vmspc on my 91. I've been able to determine the 12v power wire and ground. I can't for the life of determine the data+ and data - . Does anyone know what color codes they used on a similar year coach?
thanks