Checking The Wiring And Connections In The Positive And Negative Circuits
When the voltage drop is too high this means too high resistance in the circuit.
The ground terminals are an important part of the vehicle's electrical system.
All sub-system voltage levels refer to the vehicle's ground terminals (as 0 V).
The three illustrations show grounding point bolted joint for engine block (the left illustration) and body (the right illustration), as well as the current's path in the joints.
If there is inadequate ground connection contact, this will have a negative impact on the electrical system.
It is very important that the ground connection is correct, that is, that frame screws are adequately tightened and that the cable terminals at the connections are correctly contact-pressed.
Grounding point where several cables are interconnected is of special importance.
There must not be any corrosion between the cable terminals and screw heads.
Check the starter motor connection for voltage supply and connection to the engine block. Check for contact resistance and oxidation.
Check the connections of the terminals to the cables.
Check the engine's ground connection for contact resistance and oxidation.
Check the connections of the terminals to the cables.
Check the positive and negative terminals of the battery. Check for contact resistance and oxidation.
Check the connections of the terminals to the cables.
Check the connection for the battery negative lead to the body.
Remedy as necessary.
Other information
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Refer to VERIFICATION