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Horn Starting My Car 

 

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 Post subject: Horn Starting My Car
Posted: Wed Mar 17, 2010 7:56 pm 
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Ride: EF Falcon GLI

Location: sydney
NSW, Australia

Hey everyone im looking for some ideas on whats going on with my car, it's a manual 94 ef gli sedan and has recently begun not starting sometimes when i turn the key.
I have now found through sheer luck that if it won't start, if i honk the horn or turn the headlights on and off it will start, even if i do this while i'm turning the key, honk and simultaneously it starts. Weirdly enough the usual honk or headlight trick wasn't working yesterday when it wouldn't start and somehow i bumped the brake while turning the key and it started simultaneously :? Although it hasn't caused me any trouble yet it seems to be developing new symptoms and i'm worried the next one may not have a quick fix.
Any help will be much appreciated.
Thanks

 

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 Post subject: Re: Horn Starting My Car
Posted: Wed Mar 17, 2010 9:46 pm 
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hit the dash just infront of your left knee while trying to start. its probably the BCM

 

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 Post subject: Re: Horn Starting My Car
Posted: Wed Mar 17, 2010 11:57 pm 
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try flicking hi beam on and off three times followed by pumping the foot brake rapidly while closing the centre console lid. then swear violently and punch the dash hard, quickly followed by a vicious turn of the key and a footward stab on the accelerator. works for me every time....
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 Post subject: Re: Horn Starting My Car
Posted: Thu Mar 18, 2010 5:57 pm 
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Ride: EF Falcon GLI

Location: sydney
NSW, Australia

Hitting the dash doesn't do anything, just the horn and lights so i guess ill have to take it to an auto electrician and see what they have to say, thanks for your help mate

 

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 Post subject: Re: Horn Starting My Car
Posted: Thu Mar 18, 2010 6:10 pm 
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Ride: NA Fairlane / FE LTD

Location: bayswater
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Dont hit the dash, bang the panel with your fist by your left knee while turning the key. This is a bandaid fix that should be fixed asap because it will eventually fail.
If it starts your BCM is kaput
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 Post subject: Re: Horn Starting My Car
Posted: Thu Mar 18, 2010 6:14 pm 
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Sounds like the Smart Lock module to me.
It is located under the dash (to the left of the steering column) where the handbrake used to be located for the EAs, etc...
Turn the key and give that area a hard smack at the same time.

Works for me everytime!
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 Post subject: Re: Horn Starting My Car
Posted: Thu Mar 18, 2010 6:17 pm 
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Ride: EF Falcon GLI

Location: sydney
NSW, Australia

Turns out it does work, but the horn seems funnier to start the car with, guess ill be getting a new bcm installed, thanks everyone who acctually hellped

 

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 Post subject: Re: Horn Starting My Car
Posted: Thu Mar 18, 2010 6:42 pm 
Tyre Shredder
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Ride: NA Fairlane / FE LTD

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Your only going to replace it with another dodgy one or one that soon will be. It is the BCM not the smart lock module. There is another thread going at the moment, have a read.

Look for "car sometimes starts"
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 Post subject: Re: Horn Starting My Car
Posted: Thu Mar 18, 2010 7:05 pm 
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check your battery terminals

 

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 Post subject: Re: Horn Starting My Car
Posted: Thu Mar 18, 2010 7:18 pm 
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Ride: EL F100 CAPRI XR EF

Power: 234 rwkw

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SA, Australia

nalane wrote:
Your only going to replace it with another dodgy one or one that soon will be. It is the BCM not the smart lock module. There is another thread going at the moment, have a read.

Look for "car sometimes starts"


smartlock is part of the bcm in ef and el's
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 Post subject: Re: Horn Starting My Car
Posted: Thu Mar 18, 2010 7:19 pm 
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oops
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 Post subject: Re: Horn Starting My Car
Posted: Thu Mar 18, 2010 7:22 pm 
Tyre Shredder
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Ride: NA Fairlane / FE LTD

Location: bayswater
VIC, Australia

smartlock is part of the bcm in ef and el's[/quot
Exactly
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 Post subject: Re: Horn Starting My Car
Posted: Thu Mar 18, 2010 7:31 pm 
Getting Side Ways
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Ride: EL F100 CAPRI XR EF

Power: 234 rwkw

Location: brighton
SA, Australia

they are common to have dry soldered joints inside them (bcm)
sounds like the dry joints are related to the earth, if u can also get it to start with lights and horn

raa and roadside assistance will try turning the lights on when a broken down car is stuck on the side of the road if the battery just went dead. helps the earths get a better contact
id be checking the 3 earths in the engine bay and remove and clean/spray the battery terminals with some crc/wd spray too
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 Post subject: Re: Horn Starting My Car
Posted: Thu Mar 18, 2010 8:52 pm 
Tyre Shredder
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Age: 52

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Ride: NA Fairlane / FE LTD

Location: bayswater
VIC, Australia

Exactly where are all the earths. We hear so many earth related problems it would be good to have a list of where they all are through the whole car.
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