911 Carrera 2 Targa F6-3600cc 3.6L SOHC (1992)
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Install ammeter between battery minus pole and vehicle body. Then disconnect the vehicle ground strap at the body mounting point. This will prevent
interrupting the circuit and allowing the relay to collapse.
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After locating the defective relay, a higher current draw is still possible due to the control unit for the heating-A/C remaining active up to 20 minutes.
Step 3: Measuring current draw of electronic components
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Current draw of electronic components can be measured directly from the fuse in the C.E.B.
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Remove the pertinent fuse and connect ammeter. A defective fuse should be installed to permit easier connecting of the ammeter. Do not probe the
fuse openings in the C.E.B. as this may cause spreading of the fuse contacts.
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For all 911 Carrera 2/4, the chart shows approximate (middle) values for current draw by component.
Step 3.1: Diagnosing current draw through the central electric board.
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Remove battery minus cable and install amp meter between battery minus pole and vehicle body.
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Remove and install fuses one at a time and then relays to determine cause of current draw.
Step 4: Battery control lamp - alternator and voltage regulator checking
Step 4.1: Switch on ignition. The battery lamp must light up. After starting the engine, the battery lamp must go out. If this does not occur, a problem
exists in the vehicle charging system.
The D+ circuit of the charging system can be checked at the following points:
6 Cylinder - C.E.B. plug "M" terminal 12 (blue wire).
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Pin 11 of the 14 pin connector engine compartment, left side.
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Time clock, pin 12. To disconnect, remove the pin from the connector.
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To interrupt the circuit, remove the pertinent pin from the connector.
4 Cylinder - Directly on alternator.
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C.E.B. plug "E" terminal 15 (blue wire).
