Having problems with my 4WD engaging on my 95 YJ. It never has engaged since I got the Jeep. I bought both a new switch and diaphram acuator. I noticed today that the hard vac lines going to the acuator were broke in two. I fixed them with a couple pieces of rubber vac line. I do have vacuum at the pass side check valve, But nothing to the acuator. Where can I buy a new or good used harness? I only see new 87-90 harnesses online for sale, can these be modified to work with the '95 2.5 YJ?