Sentra Sedan L4-1597cc 1.6L SOHC (E16S) (1986)
Connect the voltmeter as described in illustration, starting at the battery and working your way around the circuit.
An unusually large voltage drop will indicate a component or wire that needs to be repaired. As you can see in the illustration above, the poor
connection causes a 4 volt drop.
The chart that follows illustrates some maximum allowable voltage drops. These values are given as a guideline, the exact value for each component may
negligible <.001 volts
Approx. 0.1 volts
Approx. 0.3 volts
Approx. 0.5 volts
Proper Diagnostic Procedures to Avoid Damaging Other Components
In the process of diagnosing electrical incidents you may be required to remove components, disconnect connectors and inspect parts.
When working with any test equipment, be careful to follow all manufacturers directions and warnings. Improper use of test equipment can result in
damage to either your test equipment or vehicle electrical components.
When working on a vehicle's electrical system you need to use care. The following guidelines will help you prevent new problems while diagnosing an
When removing components (such as an engine) which have electrical connectors, disconnect all of the connectors prior to attempting to take the
component out of the car. Stretching the connector harness can cause wiring to pull loose and may create a short or open circuit as well as a possible
When reinstalling components, wait until the component is back in the vehicle before reattaching connectors. Once the component is back in the car,
check to verify that the wires and harness are properly positioned in the vehicle. Check the male and female connectors to verify there is no water,
grease, dirt, etc. in the connector. Assure that the harness will not be damaged by any brackets or finishing screws. Reconnect the connector. Make sure
the connector has an appropriate amount of slack to accommodate any component motion without having unnecessary slack. Secure the harness as
required to prevent possible damage to the harness itself.
Disconnect the connectors by releasing any locking tabs and pulling on the connector housings. Never disconnect a connector by pulling on the harness
Before connecting the harness connectors, inspect the housings to make sure there is no water, grease, dirt, etc. in the housing which may interfere with
the proper operation of the connector or component.