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6v constant with 12v flash How to stop 6v

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ua///m3 
Member - Posts: 2
Member spacespace
Joined: March 07, 2006
Location: United States
Posted: March 07, 2006 at 7:59 PM / IP Logged  

Ok, well here is the situation. In my BMW 3 series for the parking lights and blinker, there is a single filament bulb. When I turn on the parking lights, there is a constant 6v signal and when I put the blinker on, there is a 12v signal sent for the bulb to blink. Basically, I do not want the parking lights to go on in the front for car show reasons, but I still want to retain my blinkers for when I am driving around. What can be done. I was thinking somewhere along the lines of a volt detector to detect only the 12v signal, but I have absolutely no idea of electronics. Any ideas would be great. thanks.

ua///m3 
Member - Posts: 2
Member spacespace
Joined: March 07, 2006
Location: United States
Posted: March 09, 2006 at 5:08 PM / IP Logged  
bump. no one knows. Is it possibe to build some sort of a relay or circuit???
mad550 
Copper - Posts: 201
Copper spacespace
Joined: February 23, 2006
Location: Australia
Posted: March 09, 2006 at 5:36 PM / IP Logged  
Try a crystal diode, they only conduct when the voltage reaches a curtain threshold eg:11.5v just ask your local electronics supplier, also known as a "crash" diode.
WOW Sight and Sound
Maroochydore
Nothing is impossible!
Do it right the first time or don't do it at all.
datspeed77 
Member - Posts: 35
Member spacespace
Joined: September 14, 2004
Location: United States
Posted: March 29, 2006 at 5:25 PM / IP Logged  
You can hook up a SPDT relay directly to the blinkers.  Use your 12V trigger off of your blinkers to trigger the relay. 
geepherder 
Platinum - Posts: 3,668
Platinum spaceThis member consistently provides reliable informationspace
Joined: October 27, 2003
Posted: March 30, 2006 at 4:49 AM / IP Logged  
That alone won't work because 6v will trigger the relay.  You can probably wire a resistor in series with the coil (keep trying higher values) until 6 volts does not trigger it.  You could use a zener diode as suggested above, however, just use it to trigger a relay.
My ex once told me I have a perfect face for radio.
datspeed77 
Member - Posts: 35
Member spacespace
Joined: September 14, 2004
Location: United States
Posted: March 30, 2006 at 10:53 AM / IP Logged  
geepherder wrote:
That alone won't work because 6v will trigger the relay.  You can probably wire a resistor in series with the coil (keep trying higher values) until 6 volts does not trigger it.  You could use a zener diode as suggested above, however, just use it to trigger a relay.
Wow!  I didn't know 6v will trigger a 12V relay!  Are you sure?  I remember on the 2002 Ford Taurus, the remote turn on is 6V.  I tried to trigger a bosch relay with it and it didn't work. 
geepherder 
Platinum - Posts: 3,668
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Posted: March 30, 2006 at 11:19 AM / IP Logged  
I've done it.
My ex once told me I have a perfect face for radio.
datspeed77 
Member - Posts: 35
Member spacespace
Joined: September 14, 2004
Location: United States
Posted: March 30, 2006 at 11:22 AM / IP Logged  
geepherder wrote:
I've done it.
Maybe the bosch relay won't.  What kind of relay is it?  I'd love to have those in the shop! 
geepherder 
Platinum - Posts: 3,668
Platinum spaceThis member consistently provides reliable informationspace
Joined: October 27, 2003
Posted: March 30, 2006 at 11:57 AM / IP Logged  
I didn't realize that was a problem, maybe I just got lucky.  I used a Bosch-type, not positive of the brand, but it was used in a Ford as well.
My ex once told me I have a perfect face for radio.

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