circle in blue for horn. circle in red for left side control on steering wheel. circle in green for right side control on steering wheel. circle in orange plug into the CIM. any broken wires will cause the horn dont work or steering wheel control doesnt work. This is an older thread, you may not receive a response, and could be reviving an old Step 1: First, look car owner’s manual for fuse location if the fuse blows, then you got a bum horn and if the fuse is good, jump power directly to the car with a homemade fused jumper and if it makes a clicking sound, the problem could be a poor ground connection. Step 2: Clean the ground connection of your horn. hellboys Discussion starter. 5 posts · Joined 2015. #6 · Apr 6, 2015. 1) i check the fuse amp. 2) check the wires under the engine where the horn are connection no damage wire. 3) switch light on sidelight on fog light on. 4) using the panel brightness up and down. 5) radio volume up and down. i have try different ways to find out why the pf2V.

opel astra horn not working