With Multimeter Test Procedure

NOTE: Use an in-line ammeter between the battery positive or negative post and its respective cable.






1. Insert the test leads from Rotunda 73 Digital Multimeter 105-R0051 or equivalent in the input terminals.
2. Turn switch to mA/A dc.
3. Disconnect battery terminal and touch probes.
4. Isolate circuit causing current drain by pulling out one fuse after another while reading the display.
5. Current reading will drop when the fuse on the bad circuit is pulled.
6. Reinstall fuse and test components (including connectors) of that circuit to find defective component(s).

NOTE: Do not start vehicle with clip on cable. The current reading (current drain) should be less than 0.05 amp. If it exceeds 0.05 amp it indicates a constant current drain which could cause a discharged battery. Possible sources of current drain are vehicle lamps (for example, glove compartment or luggage compartment lamps) that do not shut off properly.