19. SWITCHES/HORN/FUEL UNIT/THERMOSTATIC SWITCH /TEMPERATURE GAUGE/INSTRUMENTS/LIGHTS 12V Battery HORN INSPECTION Remove the front upper cover. ( 2-5) Disconnect the horn wire couplers. The horn is normal if it sounds when a 12V battery is connected across the horn wire terminals. Horn FUEL UNIT FUEL UNIT INSPECTION Remove the fuel unit. Disconnect the fuel unit wire connectors. Measure the resistance between the fuel unit Upper wire terminals with the float at upper and lower positions. Upper Wire Terminals Upper Lower Lower Y/WG 3345 500850 L/WG 400700 100200 Lower Y/WL/W 450750 450750 Fuel Unit FUEL GAUGE INSPECTION Connect the fuel unit wire connectors and turn the ignition switch "ON". Before performing the following test, Upper operate the turn signals to determine that the battery circuit is normal. Check the fuel gauge needle for correct indication by moving the fuel unit float up and down. Float Position Needle Position Fuel Gauge Upper "F" (Full) Lower "E" (Empty) Wire Terminals Needle Position Y/WG From E to F L/WG From F to E The fuel gauge is normal if it operates as above indicated. If not, check for loosely Lower tightened nuts, poorly connected terminals or shorted wires. Needle moves from F to E. 19-5