Grand Cherokee Limited Under Hood Light - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Tech Tips/DIY/How To

Reply
 
Thread Tools Display Modes
 
  #1  
Old 04-29-2015, 11:16 AM
NetworkTV's Avatar
Member
My Jeep: 2015 3.6L WK2
 
Join Date: Apr 2015
Posts: 862
Thanks: 3
Thanked 201 Times in 153 Posts
Rep Power: 12625
NetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond repute
Grand Cherokee Limited Under Hood Light

I previously posted this in the "what did you do with your WK2 today" thread, but I figured I'd repost it here for those that might be interested in doing the same thing. I've also added a bit more information about materials and products....descriptions of photos appear above each photo...

Since my GC Limited didn't come with an under hood light, I decided to install one. However, I decided that if I was going to do it, I wanted lighting that would actually provide light.

I decided to install two LED strips - one under the hood and one lower in the engine bay to light the lower area of the engine (where things tend to go wrong on the road).

Here are the materials. I bought most of it on Amazon just because it was easier to get exactly what I wanted, but most of it's pretty much off the shelf:

- 1 Pair LED driving lights. They run around $7 and can be found here: Amazon.com: 2 pcs Set Waterproof Aluminum High Power 6W 6000K Xenon White Slim COB LED DRL Daylight Driving Daytime Running Light Lamp For Car SUV Sedan Coupe Vehicle + Free Gift: Automotive

- One hood pin switch.

- Two standard washers to add more support for the pin switch (since I was using an existing hole that was slightly too large) as well as create more surface area for the ground.

- One inline blade fuse holder.

- 5 amp fuse

- A spool of black/red two conductor automobile wire (18 gauge).

- Various wire connectors and a battery terminal.

- 1 roll of small diameter braided wire loom (just enough to fit 2-3 18 gauge wires inside).

- Roll of Heat Shrink tubing

- Rubber bumper pad to protect the hood surface where the pin switch contacts it

- Electrical tape

- Soldering gun, flux and solder

- High temperature marine silicone adheasive

The LEDs I chose are enclosed instead of the normal bare strips due to both looks and concerns over heat and weather. They're sold as driving lights and are both heat and weather resistant. When wiring them up, I added a 5 amp blade fuse in case anything shorts.

The leads are very thin, so you'll want to beef up the protection of them in the engine bay. They're only 22 gauge. In addition, I found it easier to solder the light connections to the rest of the wire runs since I wasn't satisfied with using butt connectors - they just didn't hold as tightly with two different gauges:



I started by running wiring inside the hood and around the engine bay for the LEDs. For the wires in the engine bay itself, I used a mesh wire loom, similar to what is used on much the Jeep OEM wiring. For the hidden stuff, I used heat shrink tubing to prevent wires chafing on the body and frame.

If I only did an upper light, the install would require no removing of body parts, other than popping up the plastic near the pin switch location to be able to tighten the lower nut on it (there's no way to get your hand or tools in there unless you do).

Since I did a lower light, I had to remove the lower fascia below the radiator and front of the engine. There are 3 screws and a snap tab just behind the bumper, two screws on each side securing the fascia to the inner fender covers and two larger screws at the rear.

The lower light was placed on the support beam below the radiator fan. After some testing, I found that beam never gets hot, even after long highway drives.

To start everything off, I ran my wiring, using heat shrink tubing where wires went into body parts and wire looms for the rest. Where the wire comes out near the hinge, I strapped it down to keep it from ending up pinched in the hinge:


Fishing wires in the hood....





Engine Bay wiring (The skinny wire loom in the center of the first photo is mine - second from the left):



Wire runs to the hood switch and the lower lighting (foreground horizontal loom and the background vertical one with a tape covered OEM wire between them):




The Hood Switch. I was able to use an existing hole. I used the washers mentioned above to stabilize it since the whole is slightly oversized and oval shaped. It's off center in the hole because it ensures the switch clears some plastic below when the hood presses it down.

The switch is simply a ground connection that connects or breaks when the switch is pressed or released:



Testing the upper light (with the garage lighting on):



...and the lower light before putting the lower fascia back on. I also hadn't put the wire loom on (it's split, so it can be put on after install) or strapped the wire run down yet:



...and finally, here's what they look like in the dark:





In the last photo, you can see the lights actually provide a decent amount of ambient light - plenty to work by:



So, now I have under hood lighting that actually lights up the whole under hood area, not just the top of the engine.

My goal is to find a better switch than a pin switch since those tend to break and look somewhat ugly. I'd like to see if I can come up with something that works off the hinge and provide the same result. I thought about a tilt switch, but those can result in the lights flashing on and off on bumpy roads or steep uphill grades.

If anyone knows of a better ground based switch, feel free to let me know.

__________________
2015 Jeep Grand Cherokee Limited
Deep Cherry Red Crystal Pearl Coat

Reply With Quote
The Following 2 Users Say Thank You to NetworkTV For This Useful Post:
Sponsored Links
Advertisement
 
  #2  
Old 04-29-2015, 08:59 PM
Member
My Jeep: 2014 6.4L SRT WK2
 
Join Date: Jan 2011
Location: Near Tulsa, OK
Posts: 391
Thanks: 0
Thanked 34 Times in 21 Posts
Rep Power: 22140
rich mac has a reputation beyond reputerich mac has a reputation beyond reputerich mac has a reputation beyond reputerich mac has a reputation beyond reputerich mac has a reputation beyond reputerich mac has a reputation beyond reputerich mac has a reputation beyond reputerich mac has a reputation beyond reputerich mac has a reputation beyond reputerich mac has a reputation beyond reputerich mac has a reputation beyond repute
Re: Grand Cherokee Limited Under Hood Light

I have a similar setup (same lights), except put both on the hood, separated to cover both sides of the engine bay. I did use the mercury switch. I adjusted the switch so it activates when the hood is about halfway opened, I haven't noticed any momentary lights while driving. I found an unused hot terminal in the TIPM, and grounded to the false negative battery terminal (it screws off easily so the added wiring does not show). Covered with spiral wire loom, hard to tell the wiring was added.
Reply With Quote
The Following User Says Thank You to rich mac For This Useful Post:
  #3  
Old 05-02-2015, 09:33 AM
KONE-DAWG's Avatar
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Apr 2013
Location: North America
Posts: 137
Thanks: 3
Thanked 29 Times in 22 Posts
Rep Power: 1666
KONE-DAWG is on a distinguished road
Re: Grand Cherokee Limited Under Hood Light

Nice work like the idea
Thanks for to write up
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 05-02-2015, 10:03 AM
MDBones's Avatar
OVERLAND HIGH ALTITUDE
My Jeep: 2016 3.6L WK2
 
Join Date: Mar 2014
Location: Wisconsin's West Coast
Posts: 3,938
Thanks: 728
Thanked 693 Times in 573 Posts
Rep Power: 11114
MDBones has a reputation beyond reputeMDBones has a reputation beyond reputeMDBones has a reputation beyond reputeMDBones has a reputation beyond reputeMDBones has a reputation beyond reputeMDBones has a reputation beyond reputeMDBones has a reputation beyond reputeMDBones has a reputation beyond reputeMDBones has a reputation beyond reputeMDBones has a reputation beyond reputeMDBones has a reputation beyond repute
Garage
Re: Grand Cherokee Limited Under Hood Light

A+ job on this, NTV.
__________________
http://www.jeepgarage.org/members/54562-albums357-picture4858.png
Reply With Quote
  #5  
Old 05-02-2015, 03:12 PM
BlckWK2's Avatar
Premium Member
My Jeep: 2014 3.6L WK2
 
Join Date: Apr 2014
Location: Metro Detroit
Posts: 794
Thanks: 144
Thanked 135 Times in 92 Posts
Rep Power: 2270
BlckWK2 has a reputation beyond reputeBlckWK2 has a reputation beyond reputeBlckWK2 has a reputation beyond reputeBlckWK2 has a reputation beyond reputeBlckWK2 has a reputation beyond reputeBlckWK2 has a reputation beyond reputeBlckWK2 has a reputation beyond reputeBlckWK2 has a reputation beyond reputeBlckWK2 has a reputation beyond reputeBlckWK2 has a reputation beyond reputeBlckWK2 has a reputation beyond repute
Garage
Re: Grand Cherokee Limited Under Hood Light

Great write up and DIY.


--------
Phil
__________________

Phil
14' Altitude
Reply With Quote
  #6  
Old 05-02-2015, 03:34 PM
ekaz's Avatar
Member
My Jeep: 2015 6.4L SRT WK2
 
Join Date: Oct 2009
Location: Chicago
Posts: 764
Thanks: 9
Thanked 40 Times in 33 Posts
Rep Power: 3799
ekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond reputeekaz has a reputation beyond repute
I did the same sort of setup on my 300,but put both lights on the hood, they work really well.
Thanks for the write up, I'm going to keep it handy if I have a Jeep to put these on.
__________________
2015 Billet Silver
past:
2012 300SRT, 2009 Jeep SRT, 2006 Charger SRT
Too many mods to list for each, so let's just say a lot was done over the years.
Reply With Quote
  #7  
Old 05-02-2015, 06:47 PM
NetworkTV's Avatar
Member
My Jeep: 2015 3.6L WK2
 
Join Date: Apr 2015
Posts: 862
Thanks: 3
Thanked 201 Times in 153 Posts
Rep Power: 12625
NetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond repute
Re: Grand Cherokee Limited Under Hood Light

Thanks for the kind words, everyone.

...and Rich, thanks for the info. I'll look into tilt switches a bit more. If I can get the angle steep enough, it might do the job.

I'd probably go with a mechanical or electronic tilt switch instead of mercury since those tend to be less affected by vibration, but the down side is those tend to fail more easily in extreme environments.
__________________
2015 Jeep Grand Cherokee Limited
Deep Cherry Red Crystal Pearl Coat

Reply With Quote
  #8  
Old 05-07-2015, 07:07 AM
Member
 
Join Date: Oct 2014
Posts: 58
Thanks: 17
Thanked 9 Times in 8 Posts
Rep Power: 11378
CaptWill has a reputation beyond reputeCaptWill has a reputation beyond reputeCaptWill has a reputation beyond reputeCaptWill has a reputation beyond reputeCaptWill has a reputation beyond reputeCaptWill has a reputation beyond reputeCaptWill has a reputation beyond reputeCaptWill has a reputation beyond reputeCaptWill has a reputation beyond reputeCaptWill has a reputation beyond reputeCaptWill has a reputation beyond repute
Re: Grand Cherokee Limited Under Hood Light

NTV, nice job, and pictorial write-up. Thanks for posting.

Rich Mac, can you post any pics of the mercury switch install and wire routing to the 'false negative battery terminal'? I presume that you are referring to the jump-start terminals.

Regarding tilt-switches; I agree they tend to fail, as did the pone on my 2000 Sierra p/u. I took it apart, and expected to see corroded terminals. What I found was they use a sliding weight, that moves against 2 terminals, to complete the circuit. The weight was not sliding, so I cleaned everything up, and put a little Fluid Film on the slider.

It's been working fine ever since. I still do not like these things, but they are better than pin switches. NTV, if you keep the pin switch, I would try to fabricate some sort of a rubber boot, to keep dirt and moisture out.
Reply With Quote
The Following User Says Thank You to CaptWill For This Useful Post:
  #9  
Old 05-07-2015, 09:57 AM
NetworkTV's Avatar
Member
My Jeep: 2015 3.6L WK2
 
Join Date: Apr 2015
Posts: 862
Thanks: 3
Thanked 201 Times in 153 Posts
Rep Power: 12625
NetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond repute
Re: Grand Cherokee Limited Under Hood Light

Quote:
Originally Posted by CaptWill View Post
NTV, if you keep the pin switch, I would try to fabricate some sort of a rubber boot, to keep dirt and moisture out.
I'm not really worried about that for two reasons:

The switch is only a ground. Worse case, moisture keeps it grounded and the lights don't come on. It won't short anything.

If the switch does fail, those things are dirt cheap to replace.

My whole reason for using a tilt switch would be to be able to have it placed in a hidden spot in/on the hood (likely under the sound mat). I'd rather not see it at all.
__________________
2015 Jeep Grand Cherokee Limited
Deep Cherry Red Crystal Pearl Coat

Reply With Quote
  #10  
Old 06-17-2015, 11:25 AM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Dec 2014
Location: RVA
Posts: 46
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 957
Reswob is on a distinguished road
Re: Grand Cherokee Limited Under Hood Light

Any way to tap into the factory hood-open sensor?
__________________
'11 WK2 Limited 5.7 - Inferno Red
Looking for stock 18's and a full sized spare!
Reply With Quote
  #11  
Old 06-17-2015, 02:56 PM
NetworkTV's Avatar
Member
My Jeep: 2015 3.6L WK2
 
Join Date: Apr 2015
Posts: 862
Thanks: 3
Thanked 201 Times in 153 Posts
Rep Power: 12625
NetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond reputeNetworkTV has a reputation beyond repute
Re: Grand Cherokee Limited Under Hood Light

Quote:
Originally Posted by Reswob View Post
Any way to tap into the factory hood-open sensor?
Possible, if it's a ground activated switch. I'd have to look into it further to know what triggers it.
__________________
2015 Jeep Grand Cherokee Limited
Deep Cherry Red Crystal Pearl Coat

Reply With Quote
  #12  
Old 06-21-2015, 07:37 AM
Member
 
Join Date: Nov 2013
Posts: 99
Thanks: 13
Thanked 1 Time in 1 Post
Rep Power: 1417
diggum is on a distinguished road
Re: Grand Cherokee Limited Under Hood Light

The way you captured that V6 cover light up looks as if it belongs on the brochure
Reply With Quote
Reply

Tags
grand cherokee, limited

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2002 Grand Cherokee Limited Knocking when under load! Dirish1 Troubleshooting/Problems 4 11-29-2016 07:56 AM
'97' wrangler under hood light assembly,, jeepman97 Wrangler-YJ, TJ & JK 3 09-09-2014 10:39 AM
Billet Technology Jeep Grand Cherokee 5.7L Under Hood Package 2011-2012 J13ntv Billet Technology 3 02-20-2012 03:52 PM
rims, under the hood, rear spoiler parry69 Visual Modifications 13 07-27-2010 12:09 PM
Light for WK under the hood. TimmyB Audio, Video, Navigation & Electronic Modifications 26 02-12-2010 05:41 PM

» Premium Vendor Showcase
Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 03:27 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.