AboutDavid Scott Expertise Questions regarding the advisability of different kinds of modifications to Samurai/Sidekick/Tracker or various kinds of off-road usage. I will not attempt to do more than provide links for questions about other Suzukis such as Vitara, Grand Vitara, etc. I may or may not give generalized advice for newer models, but have no experience regarding newer models, and will not attempt to give more than the most generalized answers for questions regarding vehicles later than '93 manufacture. I will however, if possible, provide a link that will help you contact a professional in your region.
Experience I've been a professional mechanic for over thirty five years, live in the center of the Rocky Mountains, and have been active in exploring the old mining/4wd roads for decades. I've specific experience with Samurai modification, because that's my personal vehicle.
Education/Credentials Thirty five years of advanced, intensive classes for experienced professionals only. Manufacturer seminars and training classes averaging four to six weeks per year. I'm now a professional heavy duty fleet mechanic, and no longer deal with issues such as MIL (check engine) lights
Expert: David Scott Date: 8/5/2008 Subject: 87 suzuki samurai
Question My samurai dies sometimes. It will not charge the battery. I put in a new battery and it's dead too. I can jump it but it won't hold a charge and it won't stay running unless I'm reving it up. I tested the alternator and it's good. Any ideas would be greatly appreciated.
Answer Do a voltage drop test. This is done by taking a voltmeter (even a cheap one will do)and setting it on the 12 volt scale. now measure the voltage between the block and the negative POST (not the connector on the battery cable) of the battery while cranking the engine You should read significantly less than 2.0 volts. Do the same between the output terminal of the alternator and the positive post of the battery. It's also easily possible that the alternator belt can be badly worn, loose and glazed, and slipping, and not be making any squealing noises. This too will cause failure to charge.
If you encounter any high voltage on the voltage drop tests, try substituting (or adding) an 8 gauge cable from the block or alternator, and the appropriate post. Having poor connections, and high resistance in these circuits is not at all uncommon in older vehicles.
scotty
