No Good Deed - 997.2 now no power up under 'ignition' setting.
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No Good Deed - 997.2 now no power up under 'ignition' setting.
Seen there were many threads related to this sort of symptom in the past years, though I'm not sure this case is like them, but may have missed something.
Its a 2009 997.2 and it sat on the battery maintainer much of the past year, as much of the covid era. But age also wears out parts so now 14 years into its life, as it was having a hard time cranking up, I figured its time for its 3rd battery (so the prior 2 batteries had average 7 years per battery).
Simple job, what could go wrong, done it before. Put the car on the battery maintainer (12 v cig power port in the center by the hand brake).
Unbolt the battery cables, insulate their ends and push them out of the way, unbolt the hold down, tilt and remove the old battery, put the new one (an AGM this time) in the slot, reinstall the hold down clamp. And reattach the power leads first the positive to its post, then the negative to its post. Tuck away the now unneeded off-gas vent hose.
Now the fun, get in and insert the key - radio comes on as usual, the dash display illumination of mileage, displays, the PCM is running. The power seats work.
But that is it. Insert the key, and turn to engage the electrics and nothing happens - nothing additional lights up in that position. At all. Note, I'm not trying to start the car here, just the ACC power position doesn't get anything lighting up beyond the basics. Turn the key to start (clutch depressed and nothing happens, of course). As there was no prior indication of an issue and the car has been sitting in a mild weather area in a garage, I've got no reason to think there is a mechanical switch issue such as with the keyway being grunged up or the clutch switch now being a problem.
The turning of the key from off to the next position, which should power up the car's electrical systems just doesn't do anything.
So what have I managed to hose up?
And what should I do to address it? Disconnect the battery for an hour and reattach?
Its a 2009 997.2 and it sat on the battery maintainer much of the past year, as much of the covid era. But age also wears out parts so now 14 years into its life, as it was having a hard time cranking up, I figured its time for its 3rd battery (so the prior 2 batteries had average 7 years per battery).
Simple job, what could go wrong, done it before. Put the car on the battery maintainer (12 v cig power port in the center by the hand brake).
Unbolt the battery cables, insulate their ends and push them out of the way, unbolt the hold down, tilt and remove the old battery, put the new one (an AGM this time) in the slot, reinstall the hold down clamp. And reattach the power leads first the positive to its post, then the negative to its post. Tuck away the now unneeded off-gas vent hose.
Now the fun, get in and insert the key - radio comes on as usual, the dash display illumination of mileage, displays, the PCM is running. The power seats work.
But that is it. Insert the key, and turn to engage the electrics and nothing happens - nothing additional lights up in that position. At all. Note, I'm not trying to start the car here, just the ACC power position doesn't get anything lighting up beyond the basics. Turn the key to start (clutch depressed and nothing happens, of course). As there was no prior indication of an issue and the car has been sitting in a mild weather area in a garage, I've got no reason to think there is a mechanical switch issue such as with the keyway being grunged up or the clutch switch now being a problem.
The turning of the key from off to the next position, which should power up the car's electrical systems just doesn't do anything.
So what have I managed to hose up?
And what should I do to address it? Disconnect the battery for an hour and reattach?
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Joined: Aug 2008
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From: Pacific Northwest
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Well, as it was late at night I just disconnected the negative terminal from the battery, tucked it away by the side and went to bed - not wanting to wake neighbors in case there was horn wailing on a reconnect.
Next morning, reconnected the negative and the car is all back to normal. The module for that accessory bus enable just did not like being on the battery maintainer at all.
Next morning, reconnected the negative and the car is all back to normal. The module for that accessory bus enable just did not like being on the battery maintainer at all.
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