简介

When your car won't start the first place to check is the battery. Your car needs a solid 12 volts to start properly.

If the car will start after you charge up your battery, but not the next time you drive, your alternator may not be properly re-charging it. Same for if your lights go dim while driving, or your radio acts up, etc.

It's very easy to do some basic testing to see if your battery and/or alternator are working properly. This can help you begin to narrow down your problem.

配件

无需配件。

  1. Open the hood.
    • Open the hood.

    • Turn on your multimeter. Set it to the setting shown, which is for measuring 20 volts and under.

  2. Connect the tester leads on your meter to the terminals on your battery. The red lead goes on the positive (+) terminal on your battery, and the black lead goes on the negative (-) terminal.
    • Connect the tester leads on your meter to the terminals on your battery. The red lead goes on the positive (+) terminal on your battery, and the black lead goes on the negative (-) terminal.

  3. 所有超过US$100或包含 Pro Tech工具包的订单免费送货!

    浏览我们的商店
  4. Check your gauge. A healthy battery should read about 12.5 volts when the car is off. This battery is only a few weeks old and is testing well as expected.
    • Check your gauge. A healthy battery should read about 12.5 volts when the car is off. This battery is only a few weeks old and is testing well as expected.

    • If the battery is reading lower, especially if it's reading lower than 12 volts, consider taking it to an auto store for charge and load testing.

    • Disconnect the meter from the battery.

  5. Start the car.
    • Start the car.

    • Reconnect your leads to the battery as shown in step 2.

    • The meter will now show the volts being produced by the alternator, via the battery. This is the charging voltage of the system.

    • A healthy alternator generally will produce 14+ volts. Anything under and the alternator should be tested further. Most automotive stores will test the alternator further for free.

结论

When you've finished testing if everything looks good and you're still having electrical issues you'll need to diagnose further.

7等其他人完成本指南。

Nicolas Siemsen

于2013年12月06日注册

30,648 信誉积分

创作了79篇指南

团队

Master Techs Master Techs 的会员

Community

286 名成员

创作了801篇指南

Step 4 - After you start the car, wait about 3 to 4 minutes for the glow plugs to cut off to get an accurate voltage reading. Glow Plugs draw a lot of current and lower the voltage reading.

Mark Puckett - 回复

Idling voltage test should be done under full-load condition: turn on headlamps and set blower motor to high speed, (blower switch fully clockwise for Climate Control I - three knob system; Defrost setting for Climate Control II and III). Testing must validate voltage and current values, the latter is greater with lighting and motor loads. Comparing unloaded and fully loaded voltages can illuminate weak alternator / regulator output.

analogcd - 回复

If the battery is new only 2 month and the problem is with the starter please feedback

Amjad Hammour - 回复

添加评论

浏览统计数据:

过去的24小时: 6

过去的7天: 19

过去的30天: 102

总计 8,046