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Old 08-03-2016, 07:35 PM
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Horn Blaring - Is the Battery the Cause?

Hi All,

First time poster with a question about my 2014 Grand Cherokee Overland. I have had it for 2 years 10 months and 37300 miles - I do have the Max Care lifetime warranty.

I came back from a trip out of town and got in the Jeep at the airport parking lot only to have nothing happen - totally dead. The airport folks came over and jumped it (took only a couple of minutes) and I was on the way. The next morning (a Sunday) at 600 am the horn just starts blaring. I run downstairs hitting the buttons on the key fob with no luck. I jump in the car and hit the start button and the horn stops. I head back to bed and about 15 mins later the horn goes off again. I run down and hit the start button and it stops. At that point I decide to pop the hood and take out the fuse for the horn. Problem solved-ish for the moment (well, at least the noisy part). About a week later I go out in the morning and the battery is dead (just enough not to start, but the lights go on). I jump it from the wife's car and it starts up. I make a service apointment at my local Jeep dealership for two days later. The morning of the appointment, the battery is dead again but I jump it again and it starts right up. The horn fuse has been out since the Sunday morning wake-up call.

So, the dealership is saying the battery is not good and that is probably the cause of the horn going off. I don't know if I buy that. The battery is only dead in the mornings so I guess it might not be holding a charge, but it seems more likely that there is a short somewhere in the system.

Any thoughts/comments would be very appreciated.

Thanks,

Jeff

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  #2  
Old 08-03-2016, 10:39 PM
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Re: Horn Blaring - Is the Battery the Cause?

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Originally Posted by Jeffrey Freeman View Post
Hi All,



First time poster with a question about my 2014 Grand Cherokee Overland. I have had it for 2 years 10 months and 37300 miles - I do have the Max Care lifetime warranty.



I came back from a trip out of town and got in the Jeep at the airport parking lot only to have nothing happen - totally dead. The airport folks came over and jumped it (took only a couple of minutes) and I was on the way. The next morning (a Sunday) at 600 am the horn just starts blaring. I run downstairs hitting the buttons on the key fob with no luck. I jump in the car and hit the start button and the horn stops. I head back to bed and about 15 mins later the horn goes off again. I run down and hit the start button and it stops. At that point I decide to pop the hood and take out the fuse for the horn. Problem solved-ish for the moment (well, at least the noisy part). About a week later I go out in the morning and the battery is dead (just enough not to start, but the lights go on). I jump it from the wife's car and it starts up. I make a service apointment at my local Jeep dealership for two days later. The morning of the appointment, the battery is dead again but I jump it again and it starts right up. The horn fuse has been out since the Sunday morning wake-up call.



So, the dealership is saying the battery is not good and that is probably the cause of the horn going off. I don't know if I buy that. The battery is only dead in the mornings so I guess it might not be holding a charge, but it seems more likely that there is a short somewhere in the system.



Any thoughts/comments would be very appreciated.



Thanks,



Jeff

They can run a load test on your battery to test CCA. Ask what the test showed.


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Old 08-04-2016, 10:31 PM
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Re: Horn Blaring - Is the Battery the Cause?

Might be a bad ground.

I had a car with an alarm that would go off when it was humid. It turned out the ground was loose.
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Old 08-06-2016, 07:47 PM
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Re: Horn Blaring - Is the Battery the Cause?

Thanks for the replies. I tend to think it is a bad ground somewhere also.

Here is an update - the dealer service folks said it needed a new battery, something about bad voltage. I figured, sure. The battery is almost three years old and it is just out of warranty. So, I went to pick it up this morning, hit the unlock button on the key fob and the horn started blaring again. It stopped when I hit the lock button. I walked back inside and said "nope, wasn't the battery" and handed the fob back to them. Oh well.
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Old 08-09-2016, 06:50 PM
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Re: Horn Blaring - Is the Battery the Cause?

Quote:
Originally Posted by Jeffrey Freeman View Post
Thanks for the replies. I tend to think it is a bad ground somewhere also.

Here is an update - the dealer service folks said it needed a new battery, something about bad voltage. I figured, sure. The battery is almost three years old and it is just out of warranty. So, I went to pick it up this morning, hit the unlock button on the key fob and the horn started blaring again. It stopped when I hit the lock button. I walked back inside and said "nope, wasn't the battery" and handed the fob back to them. Oh well.
It's really sad that dealer service departments only seem to employ parts changers as so called technicians. Nobody bothers to analyze a problem anymore. They just throw new parts at the problem hoping it will fix the problem. But since most techs make about $12.00 an hour, why would they want to learn how to diagnose problems? Sad world we live in.
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Old 08-09-2016, 07:05 PM
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Re: Horn Blaring - Is the Battery the Cause?

Similar dead battery issue with my 2014! No horn blaring, but for the past week the battery has been dead twice in the morning. Makes no sense to me. But today I now have the check engine light and "service shifter" message so I guess that's something to go on.

Good luck with yours, hopefully they find the culprit!
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Old 08-15-2016, 06:40 PM
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Re: Horn Blaring - Is the Battery the Cause?

Quote:
Originally Posted by Jeffrey Freeman View Post
Thanks for the replies. I tend to think it is a bad ground somewhere also.

Here is an update - the dealer service folks said it needed a new battery, something about bad voltage. I figured, sure. The battery is almost three years old and it is just out of warranty. So, I went to pick it up this morning, hit the unlock button on the key fob and the horn started blaring again. It stopped when I hit the lock button. I walked back inside and said "nope, wasn't the battery" and handed the fob back to them. Oh well.
Hope they find the problem! Just curious what did it cost you for the new battery?
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Old 08-21-2016, 09:39 PM
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Re: Horn Blaring - Is the Battery the Cause?

They actually gave me a pretty good price on the battery w/install ($230) - the other dealerships around had the battery alone for around $270. The local auto parts stores had it for between $120-$280.

Its now a couple of weeks later and it is still in the shop. They replaced the power control module. But that wasn't it either. Last I spoke with the service folks they had it wired up in the shop trying to find the problem. Tuesday will be three weeks since I dropped it off. Oh well. At least they are providing a rental.
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Old 08-21-2016, 09:44 PM
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Re: Horn Blaring - Is the Battery the Cause?

Thank goodness you have the Maxcare. That's quite a bill racking up. Just curious, have you ever used Ed Voyles out in Marietta?
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Old 08-21-2016, 10:59 PM
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Re: Horn Blaring - Is the Battery the Cause?

I haven't used Ed Voyles. I visited them when I was shopping for the car a few years ago, but didn't end up purchasing there.

This is only the second repair issue I have had with the Jeep. The first was a transmission issue about a year after I bought it. I took it to Palmer and they were pretty good, but it took them 17 days to complete the repair (Jeep had redesigned the part and it was backordered). Palmer overall did a good job and was pretty good communicating what was going on (gave me a call every day or two). They are about 20 miles from me though.

From all I have read online (and well, taken with a grain of salt of course) - electrical problems can be a pain to find. Any recommendations on how long this type of thing can take to find? Luckily, with the horn being a major symptom, it is pretty easy to tell that it is not fixed. But I would think that it also should help narrow down the problem.
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