HID's and DRL's?

sledman62 · #1 10-18-2009, 04:44 PM

I'm a Canuck and my rig has Daytime Running Lights. Since my heads are 10 years old and in poor shape, and the fogs are filled with water and not working, I decided enuf's enuf, and ordered Lightning style knock-off heads and corners, along with Euro Style clear fogs. To compliment them, I ordered a 55w 9007 hi/low HID kit, as well as a 35w H10(9145)? kit.

Leading me to my first question:Is an H10 the same as 9145?The DDM site says it is, but I always like to be sure.

The other day I was talking to a friend about this upgrade and he has done it on a few of his cars, and he tells me I will need to "loop back" or otherwise "trick" my DRL into thinking it is working, when it is not.He tells me that when using the DRL, the power supplied to the heads is not enough to light both HID's, and only one will work.So it must be defeated in order for the HID's to light properly.

Can anyone point me in the right direction with this? I like to be well informed before I dive into the pool.

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Halverso_99 · #2 10-18-2009, 05:01 PM

Hey a fellow Canadian! I can't really help you but not to thread jack but I myself do not understand the entire concept of HID lighting so if anyone could explain it for me?

sledman62 · #3 10-18-2009, 08:42 PM

I was doing a Google of this question and here's what I came across.

http://www.fordf150.net/howto/drl.php#resistor

Quote:

"Ford enables DRL on Canada trucks simply by plugging in a DRL Relay Block and plugging in a DRL Resistor. On American trucks without DRL, the wiring harness is the same but they simply replace the DRL Relay Block with a loop-back plug and put a cap on the wiring harness where the DRL Resistor plugs in. The loop-back plug provides ground to the Multifunction Switch (Steering Column High/Low/Flash to Pass switch) so the lights still work when the DRL Relay Block is not present. On trucks sold without DRL the DRL Relay block is not present, so the resistor doesn't even need to be plugged in... thus the cap. So for people wanting to disable DRL on their trucks, all they need to do is remove or unplug the resistor.

I want to Disable DRL on my Truck...
This is actually very easy. You need to find the resistor (See Location is Everything below) and disconnect it. It's that easy. And Yes... your low beam and high beams will still work with the resistor unplugged.

"

So I guess when I get all these parts together and get em installed, I'll know what to do to get em' working.
But I'd sure like to hear some "real-world" experiences with this install.

Ronix · #4 10-19-2009, 04:43 PM

I have an 05 F150. My HID's have a wiring harness that attaches the main power directly from the batteries positive. The harness then plugs in to the stock light connection then connects the HID to the headlight housing. The stock harness will still supply the switching power to turn the headlights on/off.

I just pulled the DRL's relay on my headlights so I manually have to turn them on or off if the auto illumination doesn't trigger. The biggest thing you need to watch out for when connecting and running with DRL's still active is because it is only supplying half the power it will cause some HID's to flicker which is bad. HID's draw the most power when first illuminating so the more you can stop them from turning on and off the longer the bulbs and ballasts will last you....also a reason why I just pulled the DRL's fuse so they weren't on 247. You can still run your marker lights or just turn your headlights on if the weather is crappy that day.

H10 and 9145 are the same

sledman62 · #5 10-19-2009, 08:20 PM

Thanks, Ronix for the info,I appreciate it. Nice truck, too, by the way.