Honda CB125 CB160 (1972) [119/139] Refer to fig 5 14

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113 5 8 SWITCHES C Horn button and dimmer switch The dimmer switch is installed on the left handlebar grip It is a double step change switch and dims or changes the head lamp beam direction during night operation of the vehicle It is joined to the horn pushbutton switch Refer to Fig 5 114 5 8 Wire Harness The wire harness of automotive vehicles is the artery which serves the electrical parts and is a very important unit Troubles in the system cause not only Fig 5 114 Horn button and dimmer switch operating difficulties but sometimes fire as well It is wise to refrain from patching the wiring system The wire system consists of harness supplementary INSULATING TUBE leads terminals terminal sleeves wire nipples instru ment connection and instruments using small units as COLOR CODED LEADS connectors Refer to Fig 5 115 The wires which make up the wiring system are gathered together to facilitate wiring They are con tained in the wire harness and branches are provided wherever cotton required knitting For protection lacquered or and waxed insulation cotton net VINYL COVER FOR CONNECTOR ENDS or vinyl sleeves are used When an unfamiliar wiring system must be inspected and faulty wiring traced the merits of the wire harness become clear In the above example the one faulty branch can not be replaced but repair must made by using new wiring The wires of the wire harness and other supple mentary wires are marked in a color code or tags of identification are attached to the ends of the wires Refer to Fig 5 116 A fuse is installed on the top of the negative terminal of the battery This fuse prevents over dis charge electrical of the parts battery and or ground fire resulting shorts from faulty However when Fig 5 116 Tips of wires in wire harness an AC generating coil and selenium rectifier are coup led for power source the selenium rectifying plate is sometimes broken by high reverse current if the engine is operated without a fuse or if the fuse is burned out Breakage of the selenium rectifier can be prevented by connecting its output terminal directly to the bat tery Refer to Fig 5 117 Fig 5 117 Fuse box installed on wire harness

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