2006, horn blaring during jump start, now completely dead - Subaru Outback - Subaru Outback Forums
 
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post #1 of 8 (permalink) Old 05-24-2019, 05:21 AM Thread Starter
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2006, horn blaring during jump start, now completely dead

Hey all,

I woke up to a dead battery in my '06 outback this morning, and when I went to jump it the horn started going off as soon as I connected the donor car. While connected, and with the horn going off, I got into the outback and there were no dash lights on, and turning the key in the ignition did nothing. I disconnected the jumper cables to stop the damned horn, and also took off the battery cables to clean them and the battery posts with a wire brush.

After cleaning the posts/clamps, I tightened them back up, took out the fuse for the horn, and attempted to jump again. This time I got no response at all. I tested that the cables were hot, and they sparked when touched together, but with the positive on the battery, I couldn't get a spark out of the negative on any grounding point on the car. Predictably, there was no power to the dash or the ignition.

At this point I took the battery out, got it tested at the local parts store, and because the clerk said he couldn't even get a reading on it on the battery tester, I bought a new one.

After getting home, and installing the new battery, I still have a completely dead car. No dash lights, nothing at the ignition, etc.

Any ideas as to what's going on here??

I'm perplexed because initially the car seemed to take juice from the jumper cables (and fire off the horn, something I've never experienced during the dozen other times I've jumped the car, so I don't know why that happened) and now it's just dead altogether. Strange.

Thanks in advance to all replies, I really appreciate your help!!

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post #2 of 8 (permalink) Old 05-24-2019, 09:04 AM
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try cycling the security on-off a coupla times with the fob.

if no response from that, a main fuse may be blown.


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post #3 of 8 (permalink) Old 05-24-2019, 09:58 AM
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Are you sure you pulled the correct fuse? If so, I'd reinstall and see if you get any life back.

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post #4 of 8 (permalink) Old 05-24-2019, 10:32 AM
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Quote:
Originally Posted by ohgordsayshe View Post
...during the dozen other times I've jumped the car...

Whatever the specific problem is now (and I agree that the main fuse is a good place to start; also, find the short in the horn circuit before doing anything else), it sounds to me that there's a more pervasive issue to deal with. HPH



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post #5 of 8 (permalink) Old 05-24-2019, 11:05 AM
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If a battery fails the horn which is tied to the security system might go off. I have had this on a number of vehicles with dead / dying batteries.

Nothing wrong with the car just a bad battery.

Put the fuse back in then restart the car. All modern factory security systems reset when the key is in the ignition and the car is started.

If the security system does not reset when you key /start it try a different key. The ID tag in the key might be damaged.

If no key resets the security then the car may need to get the keys reprogrammed to the car and or the ignition switch replaced.
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post #6 of 8 (permalink) Old 05-24-2019, 11:07 AM
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If you have a after market alarm all bets are off. No telling what electrical harness the installer hacked into and screwed up.
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post #7 of 8 (permalink) Old 05-24-2019, 05:36 PM Thread Starter
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Update #1:

I forgot to mention that there is no aftermarket alarm, I did try the on/off fob strategy with no luck, and I did replace the horn fuse and that also unfortunately didn't change anything. Sounds to me like the next step is checking the main fuse with a multimeter.
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post #8 of 8 (permalink) Old 05-24-2019, 11:45 PM
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Originally Posted by ohgordsayshe View Post
I tested that the cables were hot, and they sparked when touched together ....

I can't let this one pass by.


You know this is very unsafe, right?
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