I have a factory Cat radio and would like to install it in my 252B2. While under the cab I noticed there is 2 connectors on the wire harness, I think 4 pin each. My radio is a 7 pin connector. Maybe it would be easier to install an aftermarket stereo? What are these 2 connectors on the harness for? Thanks
Page 3 here http://parts.cat.com/cda/files/4352429/7/PEHJ0103-04.pdf
If you would like a copy of the electrical schematic for your machine so that you can figure out what your "spare" connectors are for, PM with the complete Serial Number and your e-mail address.