Thanks to DonSmith because that contributing this article. This tech short article was originally posted in ~ FordF150.net. It is generally intended for 1990"s-2000"s Ford trucks but most likely additionally applies to various other Ford models and years.

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Why was this write-up created?There seems to be a many confusion about Daytime to run Lights (DRL) ~ above the Ford F150trucks.How to allow them, just how to disable them.Can I usage the currently wiring exploit to execute thisor execute I need the Ford "kit" to carry out it?Where carry out I obtain the components to enable them?Whatare the part numbers?The following article was produced to aid you with enabling or disabling DRL foryour truck.


How DRL Works:1999 and newer:From the manual:The DRL are implemented by using the short beams in ~ a lessened voltageof approximately 80% system voltage. This is accomplished by inserting a DRL resistor in collection with thelow beam filaments. When the headlamp move is engaged, the daytime running lamp function is disabledand the low beam filaments receive 100% system voltage.What that means: The DRL Relay Block enablespower to the low beams and the resistor changes thevoltage going come the low beams native 12 volts come 10 voltsthus making lock dimmer.In trucks the donot have actually DRL a loop-backplug is in ar of the Relay Block i beg your pardon providesground to the Multifunction move (Steering ColumnHigh/Low/Flash to happen switch) for this reason the typical low andhigh beam lights still work.

1998 and older: (Sorrypeople... Very minimal information top top this one)From the manual:The DRL systemis designed to rotate the high beam headlamps on in ~ areduced calculation without illuminating the high beamindicator. The mechanism is activated when the ignitionswitch is in the on position, the headlamp switch is inthe off position, and the parking brake is released.What the means: The DRL "Module"does everything. The does not use a resistorbut instead uses switches to administer lower voltage tothe High beams. Not sure around to much morelike wiring, etc.All I know is that it"snot compatible through the 1999 and newer layout.I do however have the component number because that the module:F65Z-15A272-AA.It"s location isaround the very same area together the resistor top top the 1999 andnewer trucks.

Some history of mysearch...I have talked to the company department and also partsdepartment in ~ my regional Ford Dealership (where i boughtthe truck) letting them recognize I wanted to enable DRL onmy 1999 Ford F150 truck.I was told thatthis might be excellent by to buy the DRL Kit because that about$55.00.I did simply that and also found the Iwould have to hack into my wiring harness to get this towork.I checked my shop manual and also found thetruck is currently wired because that DRL.I"m make anassumption that this is since Canada requires DRL andFord does not want to have actually 2 wiring harnesses because that thesame truck. For this reason I checked my truck and sure enough,the wiring harnesses space there and also all I necessary to carry out isreplace the loop-backplug through the DRL Relay Block and also install the DRLResistor right into it"s location.Ford enables DRL top top Canada trucks merely by pluggingin a DRL Relay Block and plugging in a DRL Resistor.On American van without DRL, the wiring exploit is the same but they merely replace the DRL Relay Blockwith a loop-backplug and put a lid on the wiring harness where theDRL Resistor plugs in.The loop-backplug provides ground come the Multifunction Switch(Steering obelisk High/Low/Flash to pass switch) so thelights still work when the DRL Relay Block is notpresent. ~ above trucks sold without DRL the DRL Relayblock is not present, so the resistor doesn"t also needto it is in plugged in... For this reason the cap. So for peoplewanting come disable DRL on your trucks, all they need todo is remove or unplug the resistor.

I want toDisable DRL on mine Truck...This is actually an extremely easy.You should findthe resistor (See ar is whatever below)and disconnect it. It"s the easy. AndYes... Your low beam and also high beams will stillwork through the resistor unplugged. :)

I desire to EnableDRL for my Truck...So you desire DRL for her truck yet don"t want to go outand acquire the electric engineering degree needed toinstall the Ford DRL "Kit"?Well... Girlfriend can allow DRL for her truck withouthacking into your wiring harness. Usage this site toget areas and part numbers because that doing this.There is another great web website out there to assist youwith this task.See the various other DRL WebSite web links below.

Location isEverything!Finding this stuff seemsto be the greatest difficulty for everyone.Here is where whatever is situated on my truck.

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DRL Resistor/Cap:The DRL Resistor (or wherein it"s claimed to be) islocated in the former of the truck.Clickfor DiagramsDRL Relay Block/DRL Loop-Back Plug:The DRL Relay Block is located just under the optimal of thepassenger side dash. Clickfor Diagrams

Part Numbers:1999 and also newer:The part numbers rely on the year of van youhave.What I have seen is that listed below are thepart numbers of the Relay Block and the Resistor: (Thebattery and penny give you an idea of size)

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Relay Block (Shown Left) - Ford part Number YL1Z-13B218-AAResistor (Shown Right) - Ford component Number XL3Z-14A601-AACost of the relay block is about $45.00 and the resistoris about $15.00. So for about $65.00 (includingshipping) you have the right to plug in this parts and also have DRL onyour truck. :)

1998 and also older:

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DRL Module - Ford part Number F65Z-15A272-AA

Contacting Me!You deserve to email me at if you have questions about this due to the fact that I"ve excellent this onmy truck and it works favor a champ.

Disclaimer:(Sorry... I have to obtain legal for a minute)What you perform to her truck/car is yourbusiness not mine. I am no responsible because that damagecaused by you or someone else to friend or your automobile byfollowing any type of or all of these pages.Use atyour own risk! occupational on your automobile at your ownrisk.All the component place views and also wiringdiagrams space from the 1999 F-150/250 Shop and also WiringDiagram Manuals spread by HelmIncorporated.(I would recommend ANYONEdoing work-related on their vehicle to acquire the shop manual...not cheap yet they are good! friend can even get themon CD!)