Car Voltage Leakage Test

How to check for and fix a battery drain in your car duration.

Car voltage leakage test.

Lessco electronics 778 370 views. Be sure to use the negative not the positive cable to test for the draw to prevent electrical shorts. With the engine running at 2000 rpm and accessories turned on except back window defroster you should get a voltage drop of 0 2v or lower. Unsubscribe from gordon bowen.

Battery voltage and leakage test gordon bowen. The average duration a car battery can last is 4 to 5 years or even 3 years in hot climates such as arizona and florida. Otherwise check for voltage drop on every connection and wire on that part of the circuit just as you did on the starter circuit voltage drop test. Reliable test results are given by most electronic testers even if the battery is not fully charged.

Give the car time to sleep modern car systems may wake up when you connect a multimeter in such a fashion as it picks up the power of its batteries. Replace a battery if it fails a load test. The optimal voltage value is 12 65 v and minimum allowable voltage is 11 9 v. 12v car battery voltage chart.

When you find a big difference in the readings you found a leakage current which should be fixed. Meter both test points on the millivolt range and read the voltage drop across the fuse. Depending on the nature of the car s use the battery may not be able to recover the charge when charging from the alternator. So wait a few minutes before conducting the draw test.

When your car battery runs down when the car is just parked and won t start the car after a few days most people assume it s a short circuit. Then the voltage of the battery is measured under a load similar to what it takes to start your car. You can check the power with a multimeter to ensure the battery is fully charged. Before you do this test yourmechanic will test the car battery to be sure that it has at least a 75 charge.

To measure leakage current in the car switch your multimeter to measure dc current put the leads in the right portals and put one lead on the negative terminal of the car battery and the other lead on different wires. Voltage on the other hand is measured in parallel. Generally a 10 mm open ended wrench is the tool you ll need to remove the cable. This type of car battery test measures the ability of the battery to produce current.

1 blade type fuses have test points on top a good place to meter the voltage in a circuit.