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intermittent alternator warning light
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rvennes
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Joined: June 29, 2011
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PostPosted: Mon Mar 05, 2012 7:31 pm    Post subject: intermittent alternator warning light Reply with quote

My '73 SuperBeetle is having electrical difficulties. Every once in a while, the GEN light will come on and none of the electrical components work (no lights, turn indicator, radio, fan etc).

Engine seems to happily continue to run (but maybe just off the battery). If I pull over, turn the engine off, wait a sec and then restart, everything goes back to normal and it might not pop off again all day

Gunna check the chassis and battery grounds tonight, maybe even clean up all the electrical terminals on the battery, alt and relay.

Any other thoughts?
Thx
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Rob Timmons
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Joined: June 25, 2005
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Location: Peru NY
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PostPosted: Mon Mar 05, 2012 7:39 pm    Post subject: Reply with quote

Next time just try and wiggle key. Not sure if you can loose power through switch to the rest of the items mentioned and not the coil, but it seems like it is.
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ashman40
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Joined: February 16, 2007
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Location: North Florida, USA
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PostPosted: Mon Mar 05, 2012 8:48 pm    Post subject: Reply with quote

Replace the #11 and #12 fuses. Or at least clean up the contacts.
Power from the ignition switch runs to these fuses. The ignition coil is powered from the input side of these fuses so even if you pull these fuses the coil will remain powered.
_________________
AshMan40
---------------------------
'67 Beetle #1 {project car that never made it to the road Sad }
'75 Beetle 1200LS (RHD Japan model) {junked due to frame rot}
'67 Beetle #2 {2019 project car - Wish me luck!}
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robertraiter
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Joined: November 26, 2011
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PostPosted: Mon Mar 05, 2012 9:54 pm    Post subject: Reply with quote

my 73 standard used to do this. it was basically caused by a bad connection to the coil from the generator.
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