Honda AFRICA TWIN XRV750 (1987-2002) [251/291] 30 electrical system
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Honda AFRICA TWIN XRV750 (1987-2002) [251/291] 30 electrical system

Honda AFRICA TWIN XRV750 (1987-2002) [251/291] 30 electrical system

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9 30 Electrical system disconnect the lead from the battery negative terminal see Section 3 3 Set the multimeter to the Amps function and connect its negative probe to the battery negative terminal and positive probe to the disconnected negative lead see illustration Always set the meter to a high amps range initially and then bring it down to the mA milli Amps range if there is a high current flow in the circuit it may blow the meter s fuse 4 If the current leakage indicated exceeds the amount specified at the beginning of the Chapter there is probably a short circuit in the wiring Use the wiring diagrams at the end of this book and systematically disconnect individual electrical components until the source is identified 31 3 Checking the charging system leakage rate connect the meter as shown 2 Checking the output of the charging system and the performance of the various components within the charging system requires the use of a multimeter with voltage current and resistance checking facilities 3 When making the checks follow the procedures carefully to prevent incorrect connections or short circuits as irreparable damage to electrical system components may result if short circuits occur 4 If a multimeter is not available the job of checking the charging system should be left to a Honda dealer 31 Charging system leakage and output test 1 If the charging system of the machine is thought to be faulty perform the following checks Leakage test Caution Always connect an ammeter in series never in parallel with the battery otherwise it will be damaged Do not turn the ignition ON or operate the starter motor when the ammeter is connected a sudden surge in current will blow the meter s fuse 2 Turn the ignition switch OFF and 32 1a Alternator wiring connector arrowed XL600V HAYNES If an alarm system has been fitted note that its current draw should be taken into account when measuring current leakage 5 Disconnect the meter and connect the negative lead to the battery tightening it securely Output test 6 Start the engine and warm it up to normal operating temperature 7 To check the voltage output allow the engine to idle and connect a multimeter set to the 0 20 volts DC scale voltmeter across the terminals of the battery positive lead to battery positive terminal negative lead to battery negative terminal Slowly increase the engine speed to 5000 rpm and note the reading obtained The regulated voltage should be as specified at the beginning of the Chapter If the voltage is outside these limits check the alternator and the regulator see Sections 32 and 33 HAYNES Clues to a faulty regulator are constantly blowing bulbs with brightness varying considerably with engine speed and battery overheating HiNT 32 1b Alternator wiring connector XL650V 32 Alternator check removal and installation Check 1 Trace the wiring back from the alternator cover on the left hand side of the engine and disconnect it the wiring connector containing the three yellow wires on XL600V models remove the seat on XL650V and XRV750 P models onwards 1993 on remove the left hand side panel and on XRV750 L to N 1990 to 1992 models remove the right hand side panel to access the connector see illustrations Check the connector terminals for corrosion and security 2 Using a multimeter set to the ohms x 1 ohmmeter scale measure the resistance between each of the yellow wires on the alternator side of the connector taking a total of three readings then check for continuity between each terminal and ground earth If the stator coil windings are in good condition the three readings should be within the range shown in the Specifications at the start of this Chapter and there should be no continuity Infinite resistance between any of the terminals and ground earth If not the alternator stator coil assembly is at fault and should be replaced with a new one Note Before condemning the stator coils check the fault is not due to damaged wiring between the connector and the coils Removal Note The alternator rotor bolt has left hand threads This means it has to be slackened and tightened in the OPPOSITE direction to normal bolts Turn the bolt clockwise to unscrew it and anti clockwise to tighten it 3 On XL600V and XRV750 models remove the left hand fairing side panel and on XL650V models remove the fairing although they do not actually restrict access on any model if they re not there they can t be damaged should a tool slip when loosening and tightening the alternator rotor bolt On all models remove the belly pan see Chapter 8 and the front sprocket cover see Chapter 6 4 Either drain the engine oil see Chapter 1 or 32 1c Alternator wiring connector A pulse generator wiring connector B XRV750

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