Crosswords1 min ago
My Tahoe won't start
Saturday I tried starting my Tahoe when I turned the key I got only a click. No power to the radio , no lights, no gauges no nothing. Had a friend jump start it and went and bought a new battery, the vehicle started fine until this morning when it was back to just the click and no power now we can't even get it to jump start, it tries to start but it acts like there is not enough power. Could it be the alternator or the starter? Maybe a bad battery?
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For more on marking an answer as the "Best Answer", please visit our FAQ.To find out if your battery is being drained, and to determine which circuit/item is drawing the current � remove the negative terminal from the battery and connect an ammeter between the battery negative terminal and the vehicle chassis (the meter + lead to the chassis and the meter � lead to the negative battery terminal).
Ensure all vehicle electrics are off, including any courtesy lights. The meter will be reading the continuous drain on the battery which should be less than 0.2 Amps, even with an alarm system attached. (If your battery is draining overnight, the drain current must be at least 4 Amps).
Assuming your battery drain current is significantly greater than 0.2 Amps, pull the fuses one at a time until the current drops, identify the faulty circuit. Bear in mind that some circuits pass through more than one fuse.
Once you know the circuit with the excessive drain � disconnect individual components until the battery drain current is less then 0.2 Amps.
If the vehicle will start, it would be worth checking that the alternator is charging the battery; at rest the battery voltage should be around 12V. With the engine running, this should increase to just below 14V.
Although the purpose of the alternator is to charge the battery, it is possible for it to be the cause of the battery drain, due to a faulty diode.
Ensure all vehicle electrics are off, including any courtesy lights. The meter will be reading the continuous drain on the battery which should be less than 0.2 Amps, even with an alarm system attached. (If your battery is draining overnight, the drain current must be at least 4 Amps).
Assuming your battery drain current is significantly greater than 0.2 Amps, pull the fuses one at a time until the current drops, identify the faulty circuit. Bear in mind that some circuits pass through more than one fuse.
Once you know the circuit with the excessive drain � disconnect individual components until the battery drain current is less then 0.2 Amps.
If the vehicle will start, it would be worth checking that the alternator is charging the battery; at rest the battery voltage should be around 12V. With the engine running, this should increase to just below 14V.
Although the purpose of the alternator is to charge the battery, it is possible for it to be the cause of the battery drain, due to a faulty diode.
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