Based upon my research there is little info when it comes to the b120 4x4 that I have. I decided to pull the entire wiring harness to ensure all connections were solid, fix exposed wires, and recondition the harness where someone hacked it. Most of the harness works and is intact. The areas I am having trouble with are the brake lights and the horn. If someone could help me determine where some wires should end up, I will eventually make a wiring diagram for this particular truck to share with fellow members. Horn system The wire for the horn button has been cut within the steering column. There are no numbers on the 2" strand of green wire. Where does this wire end up inside the column and does it attach to the green #25 wire listed below? I am assuming the delco relay next to the voltage regular (was converted to 12v) is used for the horn. Below is a basic diagram of the terminals of the relay: |-green #25 goes to the steering column |-white #26 goes to the battery + of volt regulator |-white #26 goes to the horn Brake lights So I have a green wire #22 coming off the headlight switch that ends up at the pressure switch on the master cylinder. From there, the other side of the switch heads back towards the steering column. This is where I am not sure where the rest of the system should be hooked up. I have another green #22 wire that comes from the rear taillight harness and seems like it should be connected to the one off the master cylinder. Would this be correct? Should the brake lights work without the key or headlights on? One last question, how many positions should the wiper switch have? There are i believe 4 wires going to the switch but I can only turn it literally 1/32 of a turn. The wipers will work with that short of a turn but doesn't seem correct. Thank you for all the help. I am very close to driving this truck. Waiting for a title before I will mount some fresh rubber. The seat has already been upholstered! Ill post some pictures soon.