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hid kit in a 09 ford fusion.. warning light..help

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keoyo

Joined: Nov 13 2009
Posts: 52
Location: ramah, nm


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Post Fri Jan 01, 2010 6:08 pm

installed hid kit on a 09 fusion and the warning light comes on, installed a relay harness to.. how can i fix this?
alkatmsu

Joined: Nov 08 2005
Posts: 1560
Location: Kentucky


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Post Fri Jan 01, 2010 11:46 pm

No clue what you're talking about (what warning light?), but you may want to try over at http://www.fordfusionclub.com/index.php
Black DX

Joined: Oct 16 2007
Posts: 1007


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Post Sat Jan 02, 2010 1:08 am

Let me guess, it's bulb out warning right? if this is so than you're going to need to place a load on the line to fool the bcm (body control module) into thinking there is a bulb still there. DDM Tuning sells bulb out eliminators that might work with your vehicle.
clutch1

Joined: Oct 08 2006
Posts: 1928
Location: around hurr.


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Post Sat Jan 02, 2010 4:52 pm

If you can.. measure the amps the HID harness is pulling on the circuit.

Then put your stock bulb instead, and measure amps..

Take the difference... lets say it's only pulling 3 amps, and it should be pulling 5.

volts = 13.5 lets say

13.5 = HIDamps * HIDResistance ... compute to find HIDresistance.


Next 13.5 = Bulbamp * Bulbresistance ... compute Bulbresistace


Now, you need to achieve Bulbresitance with a parallel circuit.. so...

Bulbresitance = 1/ (HIDresistance + LoadResistor)

Calculate a value for LoadResistor, and go buy a BIG resitor with that value... make sure it's BIG, gonna have to be for this application...

IF you want to make sure you get a big enough resistor, do this.

(13.5/LoadResis) * 13.5 = Watts.... make sure it's a larger than your value for Watts, otherwise it'll burn up.

Wire it in parallel with on the harness, and the computer will be fooled.


Hope all this techy crap made sense
icon_wink.gif



EDIT: the above is if the HIDs are ON the bulb circuit... if you're running a relay on the bulb circuit instead, simply measure the Halogen bulb's amp draw.. then..

13.5 = Bulbamps * Resistance...

Take the value you get for resistance, and get your big resistor, and wire it in parallel with the relay on the bulb circuit.
Tat2Dragons

Joined: Jan 21 2007
Posts: 3404
Location: Baltimore Maryland


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Post Sat Jan 02, 2010 6:42 pm

^^Another way would be to just measure the resistance of the factory bulb and then simply add a resistor with the same value in line/parallel to the harness. icon_smile.gif

http://www.allaboutcircuits.com/worksheets/ohm_m.html
^^That link may be of help for the O.P.
clutch1

Joined: Oct 08 2006
Posts: 1928
Location: around hurr.


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Post Mon Jan 04, 2010 2:59 am

Tat2Dragons wrote:
^^Another way would be to just measure the resistance of the factory bulb and then simply add a resistor with the same value in line/parallel to the harness. icon_smile.gif

http://www.allaboutcircuits.com/worksheets/ohm_m.html
^^That link may be of help for the O.P.


It changes a little when it's hot.. I guess I'm being over anal though, it can't be THAT sensitive icon_lol.gif
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