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GI-48 < BASIC INSPECTION > SERVICE INFORMATION FOR ELECTRICAL INCIDENT Note in the illustration that there is an excessive 4.1 volt drop between the battery and the bulb. Measuring Voltage Drop — Steb-by-Step • The step-by-step method is most useful for isolating excessive drops in low voltage systems (such as those in “Computer Controlled Systems”). • Circuits in the “Computer Controlled System” operate on very low amperage. • The (Computer Controlled) system operations can be adversely affected by any variation in resistance in the system. Such resistance variation may be caused by poor connection, improper installation, improper wire gauge or corrosion. • The step by step voltage drop test can identify a component or wire with too much resistance. CONTROL UNIT CIRCUIT TEST System Description • When the switch is ON, the control unit lights up the lamp. CASE 1 SGI974 SAIA0258E MGI034A |