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Car has gone mad...

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by Wrooty » Fri Feb 15, 2013 7:34 pm

Hi guys!

I just got home from work and parked my car on the drive as normal. All seemed fine until about 5 mins later when I saw flashing coming from outside. I poked my head out the window to find my car indicators flashing and the door locks clicking. They were flashing randomly as if I was pressing the lock button on my key fob but if I actually do that I get the "I'm already locked" horn chirp.

If I unlock the door and quickly open it the indicators stop flashing but the locks continue to actuate. I have disconnected the battery and reconnected it but that did nothing.

Any ideas?

When my car was last serviced by Trevor he commented on the SVA saying it was well done. The car itself is 2005 and done 37000 miles.
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by yellastang mike » Fri Feb 15, 2013 8:36 pm

The two things I would think of would be. Theres a door not shut propperly (Check the trunk as well.) or the battery voltage has dropped. Battery no good. Check the windows are shut as well. (That extra 5mm when you shut the door)

Mike
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by Wrooty » Fri Feb 15, 2013 8:42 pm

I have checked the doors and windows. They are all good. I will put a fluke across the battery in a min.

Just been looking at the CCTV. I lock the car at 19:11:55 and the car goes mad at 19:14:27

Although it hasn't rained today I checked the car for water inside ( I fixed my initial leak and that was in the back anyway) under the dash is bone dry.
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by Wrooty » Fri Feb 15, 2013 8:47 pm

Battery is 12.35

Here is a video if you are interested... 2 minutes and 30 seconds after I lock the car it goes bonkers.

Image
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by LV51FER » Fri Feb 15, 2013 9:52 pm

Key battery?
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by Wrooty » Fri Feb 15, 2013 9:54 pm

LV51FER wrote:Key battery?


Key works perfectly
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by cati » Sat Feb 16, 2013 7:32 am

Two possibilities

1. Dwarf still in boot from the last "service" at trevlars, old urine has a strange effect on wiring. Remove dwarf and give him two bob fifty for bus fair home.

2. Demonic possession, so call your local catholic priest

Apart from that i have no clue..... Electricity is the devil's spunk
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by Dahk » Sat Feb 16, 2013 10:58 am

cati wrote:Two possibilities

1. Dwarf still in boot from the last "service" at trevlars, old urine has a strange effect on wiring. Remove dwarf and give him two bob fifty for bus fair home.

2. Demonic possession, so call your local catholic priest

Apart from that i have no clue..... Electricity is the devil's spunk


LOL

In Trevlars defense I never caught him pissing in the boot, or at least I thought it was yellow paint... which still dose not help Wrooty with his car problem, especially as his car is blue. ;barf;
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by 07GT/CS » Sat Feb 16, 2013 12:53 pm

Not a fault I've come across before, BUT I would suggest looking at the door switches. They are fitted behind the door locks. You will need to remove the door trim to get access to the locks/ handles. The switch is the small black item with three wires coming from it. Remove it and very careful take it apart and dry it out. The smallest amount of water/ moisture can cause resistance between the contacts.
Good luck with tracing the fault
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by Surrey Mustang » Mon Feb 18, 2013 8:52 am

Battery voltage seems low at 12.35. Charge the battery fully and then re-check.


Might also be worthwhile reprogramming the key fobs.
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by Wrooty » Mon Feb 18, 2013 9:16 am

Ok! I shall do that. Might just change the battery. I think it is still the stock one.

I did disconnect the battery overnight and so far that fault hasn't come back. I just can't for the life of me think what could have caused it.

What would you expect the battery voltage to be?
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by LV51FER » Mon Feb 18, 2013 2:11 pm

When my Z28 battery went, the computer didn't "boot" and the car would idle at 2000rpm. Had one or two other issues. I'd start there.
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by Wrooty » Fri Feb 22, 2013 10:02 am

Battery is now at 12.60. Would someone else please measure their's and let me know what you get. I have been thinking about changing the battery. What make is the stock one?
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by LV51FER » Fri Feb 22, 2013 10:49 am

Stock one is Ford Motorcraft but I think a few have got a replacement from Halfords. You need to check the dimensions carefully so the posts don't short on the hood and aim for something like 650CCA (Standard is 590).

Batteries tend to last about 4-5 years in normal use (mine is 7 years old but has been on a conditioner all its life).

Have a look at this:
http://www.batterystuff.com/kb/articles ... ics.html#6
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by Wrooty » Fri Feb 22, 2013 12:16 pm

Interesting article. I have read somewhere that a batteries behaviour is quite difficult to predict even with extensive testing. I may be wrong though.

I have had a look and the battery appears to be the stock Motorcraft one. Almost 9 years... might be time to replace.

This was the battery I had in mind...

http://www.halfords.com/webapp/wcs/stor ... yId_165762

Got the model from this forum somewhere.
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