OVERHAULING OF HORN
Aim: OVERHAULING OFHORN & TUNING TOOLS REQUIRED : 1. SCREW DRIVER (-,x) 2. FEELER GAUGE 3. MULTY METER 4. 10mm D/E OPEN SPANNER MATERIALS REQUIRED 1. EMERY PAPER 2. COTTON WASTE 3. GREASE PROCEDURE Dismantling Disconnect the wires from the horn assembly and remove the mounting nuts and take out the horn unit Remove the horn from the vehicle. Loosen the cover fixing screws. Remove the cover, packing washer, diaphragm assembly and shim. Remove the terminal's nuts and washer. Remove the contact breaker assembly from the housing. Inspection Clean the contact breaker points with fine emery paper. If necessary, replace the points. Check the coil for continuity and resistance by an ohmmeter for 12 volt - 0.75 -0.85 ohm and for 24 volt - 3.25 -3.5 ohms. Replace the coil if found burnt or defective. Check the diaphragm visually, replace if it is found damaged. Check all the screw threads visually, and if necessary, replace the screws. Clean all the parts. Assembling Place