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modifying flasher for led signals


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wungun 
Copper - Posts: 71
Copper spacespace
Joined: November 27, 2004
Posted: July 04, 2007 at 6:02 PM / IP Logged  

I need to modify the way my Ford Focus flashes the turn signal to compensate for LED signal lights (rapid flashing)

I think the flashing duties are handled by the GEM...

Has anyone modded one before?

i am an idiot 
Platinum - Posts: 13,442
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: July 04, 2007 at 9:40 PM / IP Logged  
The Led's do not pull near the current that your incadescent bulbs did.  The car thinks you have a burnt bulb, the lack of current draw is the culprit.   You may have to figure out how to get the bulbs back into the circuit along with the Led.
copcarguy 
Copper - Posts: 122
Copper spacespace
Joined: February 12, 2003
Location: Pennsylvania, United States
Posted: July 04, 2007 at 11:52 PM / IP Logged  
Whelen Engineering sells a part which is basically a dummy load that we use when converting fire apparatus from incandesent to LED. Part # LEDLOAD. You will have to purchase an individual load for each flashing lighthead. Good luck!
R Jackson
Owner/Installer
TRM Emergency Vehicles
Information is advice only and should be confirmed with OEM or quality test equipment.
Boyertown, Pennsylvania
wungun 
Copper - Posts: 71
Copper spacespace
Joined: November 27, 2004
Posted: July 05, 2007 at 7:28 AM / IP Logged  

Thanks, but I was thinking more along the lines of this...

http://www.hidplanet.com/forums/viewtopic.php?t=32116&highlight=shunt

copcarguy 
Copper - Posts: 122
Copper spacespace
Joined: February 12, 2003
Location: Pennsylvania, United States
Posted: July 05, 2007 at 8:58 AM / IP Logged  
I cna't view this without a username and password but sorry my solution wasn't what you were looking for.
R Jackson
Owner/Installer
TRM Emergency Vehicles
Information is advice only and should be confirmed with OEM or quality test equipment.
Boyertown, Pennsylvania
wungun 
Copper - Posts: 71
Copper spacespace
Joined: November 27, 2004
Posted: July 06, 2007 at 7:45 AM / IP Logged  

Here is what controls my flashers (I think), among other things...

modifying flasher for led signals -- posted image.

modifying flasher for led signals -- posted image.

copcarguy 
Copper - Posts: 122
Copper spacespace
Joined: February 12, 2003
Location: Pennsylvania, United States
Posted: July 06, 2007 at 7:52 AM / IP Logged  
OK...so do you want the flashers to behave as the regular incandesent bulbs did or are you looking for some special flash pattern?
If you want to have them operate factory original then the LEDLOAD will work, you just put one in series with each bulb/array at the lense assembly and away you go.
Let me know and I will try to help out as much as I can.
R Jackson
Owner/Installer
TRM Emergency Vehicles
Information is advice only and should be confirmed with OEM or quality test equipment.
Boyertown, Pennsylvania
wungun 
Copper - Posts: 71
Copper spacespace
Joined: November 27, 2004
Posted: July 06, 2007 at 8:09 AM / IP Logged  

Thanks...when you say in series, do you mean inline with the ground OR positive lead, or across both the + and - lead?

I imagine it would work either way?

copcarguy 
Copper - Posts: 122
Copper spacespace
Joined: February 12, 2003
Location: Pennsylvania, United States
Posted: July 06, 2007 at 8:16 AM / IP Logged  
Here is a link to the installation instructions Whelen is usually pretty straight forward with their directions.
www.whelen.com/install/135/13574.pdf
R Jackson
Owner/Installer
TRM Emergency Vehicles
Information is advice only and should be confirmed with OEM or quality test equipment.
Boyertown, Pennsylvania
js305 
Member - Posts: 26
Member spacespace
Joined: April 29, 2007
Location: United States
Posted: July 22, 2007 at 11:20 PM / IP Logged  
When changing regular stop and turn signals to LED's you need to add a resistor to each side. I use a 10 ohm 50 watt resistor. This simulates the load that a lamp like an 1157 or equivalent draws. This needs to be wired in parallel with each turn signal lamp. Splice one lead into the "hot" wire and ground the other to a convenient location.
Joe in Texas
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