EcoDiesel Summit HID bulb change - Jeep Garage - Jeep Forum

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Old 03-24-2016, 02:14 AM
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Just an FYI, this is even harder than the videos describe. Ironically, the driver side is *easier* to change on the EcoDiesel Summit than the passenger side, and the driver side involves completely removing the airbox. I finally got the driver side bulb swapped after much travail and the use of a dental mirror. The OEM bulb ceramic insulator was likely damaged as I maneuvered the bulb out of the housing because there is a paucity of slack available in the adaptive headlamp wiring harness.

I'm debating whether to even try the passenger side adaptive headlamp without dropping the fascia and bumper and releasing the headlamp assembly from the frame. It's so tight in there that even with the ECU removed it is difficult to slide a smartphone in to get a picture of the back of the D3S bulb. Unmounting the coolant reservoir didn't help to provide a better angle, nor does approaching from the fender access port. This task may be best performed by a small child who has a forearm with three wrists in a row and fingers that can individually rotate 180 degrees, or perhaps a trained, amphibious octopus.

UPDATE: I did change the passenger side bulb. It involved removing the ECU, unmounting the coolant reservoir, and having one hand up the fender access port while the other was reaching down from under the hood. It was hair-raising because the tip of the bulb *will* come into contact with various parts of the vehicle headlamp assembly.

But it all works now.

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Old 03-25-2016, 12:07 AM
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Re: EcoDiesel Summit HID bulb change

Many Bothans died to bring us these EcoDiesel-specific photos.

The blue arrows in the following images point to the locking collar that must be rotated counterclockwise (facing the back of the bulb) in order to release the bulb:

A followup photo once the D3S bulb has been removed. This image is rotated by a few degrees due to technical limitations of the composition. The eccentric aspect of the bulb housing hole is actually vertical. Blur in the foreground is the bulb wiring harness.

Facing from the front of the vehicle looking into the engine compartment, this is the passenger side bulb once "more room" has been made by unmounting the coolant reservoir and the ECU. For reference, the square metal housing of the D3S bulb is about 44 mm (aka 1.75 inches) per side:

Taken from inside the engine compartment, driver side, with airbox removed. The vertical rubber cone on the left is part of the airbox mounting hardware. Observe how much more space is available compared to the passenger side, as well as the limited amount of slack for the bulb's wiring harness. Also notable is the broken ceramic insulator on the bulb's electrode. Ouch.
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Old 12-16-2016, 12:50 AM
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Re: EcoDiesel Summit HID bulb change

Well, after only six months the driver's side HID lamp died. Yes, there's a modicum of irony that the side that I believed was less fraught to install was the one that failed.

I have mixed feelings about the sudden death of the bulb. On one hand, I'm not particularly upset that the $35 Morimoto bulb from Amazon failed. The brand has reasonable quality and the price is definitely right. Also, as one can tell from my installation travails, I may share some blame for the bulb not being perfectly pristine when it was placed in the housing. I did my utmost to avoid contaminating the bulb but it might have touched something or other during that process. I'd have definitely been irked had this been a $100 Osram bulb that died. We'll see about the warranty, but I'll be putting in another Morimoto bulb.

I'll probably drop the fascia and remove the headlamp assembly to do the replacement, as per the factory service instructions. I haven't removed the fascia before.
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Old 12-16-2016, 12:59 PM
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Re: EcoDiesel Summit HID bulb change

All the reason I need not to drive at night.


Thanks for the great post.
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Old 12-16-2016, 01:34 PM
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Re: EcoDiesel Summit HID bulb change

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Originally Posted by Sebec View Post
All the reason I need not to drive at night.
Haha, it's actually not so bad—much to my surprise. HID is roughly 3x as bright as halogen, so even with one bulb out it's still 50% brighter than two halogen bulbs would be (albeit the beam pattern isn't ideal with the driver bulb out). Tack on the fog lights and it's tolerable.

I'm still going to replace the bulb today though. I love driving at night and I love my HID.
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Old 12-17-2016, 10:59 AM
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Re: EcoDiesel Summit HID bulb change

My sneaking suspicion was confirmed that dropping the fascia would not be as easy as those videos and the published instructions on WK2jeeps made it seem. The Summit is a different beast.

I had to use a heat gun to melt off trim pieces, for example. In summary, some steps in the instructions were superfluous, and the instructions omitted other key steps. The first 80% of the time was spent figuring out how to successfully drop the fascia, and the second 80% of the time (haha) was spent on one step, trying to get the fascia corners to latch during reassembly.

On the "pro" side, this exercise made the "changing the HID bulb without contaminating it" step very easy. On the "con" side this exercise took even longer than the approach of not dropping the fascia, I have not yet fully reattached the trim pieces that needed to be melted off, and this approach can affect headlamp alignment. The simple approach of confirming restoration of alignment by checking it against masking tape on the garage that was marked off at the beginning of the project doesn't work if the bulb is already dead.

I'll post pics later of the variant steps for the Summit that differ from the official instructions & that popular video, which might help others decide which approach is best for them.
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