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Motor won't turn off but only if volt reg wire is connected (can you help?) 200 1980

posted by  3 volvo guy on  Sun Mar 14 10:42 CST 2004
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last visit: Wed Mar 11 07:23 CST 2009
[RELATED]

1980 242 Motor won’t turn off with ignition switch.
The original problem was alternator not charging battery. I found a broken wire to alternator/regulator and repaired it. It was the single small red wire with spade lug attached to voltage regulator on alternator. I forgot to disconnect the battery and wire did arc during reattachment to spade lug. Now motor will not turn off when ignition key is turned off and removed. The motor WILL however turn off properly if I disconnect this red wire from alt/reg terminal. I would leave it disconnected but of course battery will not charge properly. With the red wire attached the alternator is properly charging the battery. I suspect I may have trashed the built-in volt reg when I arced the wire but can this cause the motor to not turn off with the ingition switch?
(it's not the ignition switch, I swaped it from my other Volvo and it works fine with red regulator wire disconected...






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