940 L4-2320cc 2.3L DOHC VIN 89 B234F FI (1991)
Antitheft and Alarm Systems: Testing and Inspection
Checking the ignition feed
Measurement A:
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Ignition off.
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Connect a voltmeter between item 15 and item 31 on the alarm relay base. The voltmeter should show 0 V.
Measurement B:
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Ignition on.
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Connect the voltmeter again between item 15 and item 31 on the alarm relay base. The voltmeter should show battery voltage.
If both readings are correct:
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Continue with step N5.
If measurement A deviates:
There is a short to ground in the lead between the ignition lock and the alarm relay base item 15.
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Rectify the fault or renew the lead.
Replace the alarm control module.
If measurement B deviates:
There is a break in the lead between the ignition lock item 15A and the alarm relay base item 15, or the fuse in the fusebox may be blown.
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fuse 12
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Rectify the fault or renew the lead.
Replace the alarm control module.