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Unread 06-04-2012, 11:39 AM   #1
gunterm
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2005 TJ Wrangler 
 
Join Date: Jun 2012
Location: Topeka, Kansas
Posts: 18
Trailer wiring

OK, been lurking for a while so I decided it's time to register! Especially since I have a question now

So our 2002 KJ Liberty was bought second-hand, has a factory hitch on it but no wiring, so I assume I'll need one of those tail light converter boxes instead of the factory tow wiring kit.

Got the build sheet from Chrysler, here is what's on it:

Code:
Vehicle Description JEEP LIBERTY SPORT 4X4 SPORT UTILITY 4-DR Model Year 2002 Body Model KJ J H 74  

Sales Code     Description 
*M5 Cloth High-Back Bucket Seats
-DV Dark Slate Gray
AHMP Convenience Group I
AJPP Power Convenience Group
APAS Monotone Paint
A33P 3.7L Eng(EKG)/4Spd A/T 45RFE(DG4)
BAZS 136 Amp Alternator
BCPS 525 Amp Maintenance Free Battery
BRBS Power Front Disc/Rear Drum Brakes
CDBS Reclining Front Seats
CF5S 2nd Row Buckets, Power Fold/Tumble 
CGGS Traveling Inboard Seat Belt Buckle 
CGUS Child Seat Anchor System-LATCH Ready 
CGXS RR Head Restraints Outboard Seating 
CG1S Next Gen Multistage Front Air Bags** 
CG6S Center Rear 3-Point Seat Belt 
CKDP Floor Carpet 
CKNS Cargo Compartment Carpet 
CKTS Cargo Tie Down Loops 
CK3S Plastic Swing Gate Trim Panel 
CLEP Front & Rear Floor Mats 
CLHP Cargo Trim Panel w/Storage Net 
CLNS MOPAR Bright Door Sills 
CLPS Door Sill Scuff Pads 
CSRS Passenger Assist Handles 
CSWS Driver Assist Handle 
CTLS Base Door Trim Panel 
CUFS Full Length Floor Console 
CUKS Removable Ash Tray 
DGBS All 4-Speed Automatic Transmissions
DG4 Multi-Speed Auto 45RFE Transmission 
DHAP Lock-Up Torque Converter 
DHNS Command-Trac Part Time 4WD System 
DJJS Dana 30/186MM Front Axle 
DMEP 3.73 Rear Axle Ratio 
DRAP Corporate 8.25 Rear Axle EKG 3.7L V6 Engine 
GBBS Tinted Windshield Glass 
GCBS Front Door Tinted Glass 
GEG Deep Tint Sunscreen Glass 
GEKS Flipper Swing Gate Glass 
GFAS Rear Window Defroster 
GNAS Rear View Day/Night Mirror 
GNCP Sun Visors w/Illum Vanity Mirrors 
GT9P Power Mirrors, Fold-Away 
GVBC All Vehicles W/Power Mirrors 
GXMP Remote Keyless Entry 
HAAP Air Conditioning 
JAYS Instrument Cluster w/Tach 
JCBS 120 MPH Primary Speedometer 
JHAS Var Intermittent Windshield Wipers 
JHBS Rear Window Wiper/Washer 
JJAS Cigar Lighter 
JJBS Dual Note Electric Horns 
JJJS 12V Auxiliary Power Outlet 
JJMP Auxiliary 12-Volt Rear Power Outlet 
JKHS Glove Box 
JPDP Power Windows, Driver One-Touch 
JPHP Speed Sensitive Power Locks 
K3AS STRIPE/BADGE/MOLDING/COLOR 
LACP Illuminated Entry 
LAJS Headlamps On Warning Chimes 
LBDS Ash Tray Lamp 
LCDP Map/Dome Reading Lamps 
LDBP Cargo Compartment Lamp 
LHDS Headlamp Off Time Delay 
LMAS Halogen Headlamps 
LNJ Fog Lamps 
LPSS CHMSL Lamp 
MFKS Body Color Grille 
MHAS Black Windshield Moldings 
MLCS Gray Fascias 
MMGS Belt Moldings 
MNAS Black Door Handles 
MVCS Jeep Badge 
MVDS 4X4 Badge 
MVJS Sport Badge 
MWGP Roof Rack 
MZLP 3.7L Badge 
MZ3S Liberty Badge 
NAS 50 State Emissions 
NBKS EVAP Control System 
NBVP Low Emission Vehicle (LEV) 
NF2S 18.5 Gallon Fuel Tank 
NHFS Power Steering Cooler
PX8 Black Clear Coat
QX8S Black Clear Coat
RAAC All Radio Equipped Vehicles
RBK AM/FM Compact Disc Radio w/Chgr Ctrl 
RCGS 6 Speakers 
RDDS Fixed Long Mast Antenna 
SBAS Power Rack and Pinion Steering 
SCDS Luxury Steering Wheel 
SDAS Normal Duty Suspension 
SUAP Tilt Steering Column 
TBBP Full Size Spare Tire 
TBRS Outside Tire Carrier 
TSN P235/70R16 OWL All Terrain Tires 
TZAP Goodyear Brand Tires 
WKBS Matching Spare Wheel 
WLCP 16X7.0 Lux Styled Steel Wheels 
WLYC All Steel Wheels 
XEUS Front Suspension Skid Plate 
XGGS Grocery Bag Hooks 
XPFS Protective Coating and Remover 
YAAS Build To U.S. Mkt. Specifications
We have the power steering cooler, and the "better" transmission (according to others) used only on the early KJ's so I shouldn't need any extra cooling to tow.

I was hoping the experts here could say for sure that I can't use the factory tow wiring harness, before I order the tail-light converter. One more question about the tail light boxes, I found two models, a Curt and the one etrailer.com sells. The Curt box is a very simple install similar to the etrailer one, except that the etrailer box has a 12V wire that you run up to the battery. My question is, should I get the etrailer box because it can draw extra power, or do the tail lights have enough electricity for the Curt box to work fine?

BTW, the tow load I'll be pulling is a 21' hybrid camper weighing 2200 pounds.

thanks in advance for the help!


Last edited by gunterm; 06-04-2012 at 11:48 AM.. Reason: clean up build sheet code
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Unread 06-04-2012, 05:34 PM   #2
95BadBoy
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Join Date: May 2006
Location: Grand Forks, ND
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First post - welcome to the club -

If you are doing a seven pin type hookup (hope so) - I would lean towards the E-trailer one. You are planning in running trailer brakes aren't you? Teconsha brake controlers seem to work well on my tow rig.
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05 TJ RME 42RLE with some things
05 KJ CRD 545RFE, GDE Eco tune, Franky II, Al's 4.5 A-arms, JK Rubi Moabs, Silent Armors 245-70-17's, Spidertrax Adapters, Rola Basket, Fumoto Valve, Pinch welds pounded

FS or FT (2) JK Rubi 17" Moab Rims - really nice shape
Need JK Rear Spare tire bracket for project

Last edited by 95BadBoy; 06-04-2012 at 05:36 PM.. Reason: More info
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Unread 06-04-2012, 07:41 PM   #3
gunterm
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Location: Topeka, Kansas
Posts: 18
Trailer is a 4 pin I believe, with surge bakes. It's a rental so I don't really have much info on it.
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Unread 06-05-2012, 02:50 PM   #4
TwoBobsKJ
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Join Date: May 2011
Location: Northern, OH
Posts: 572
I would STRONGLY suggest you go with the factory 7-pin round - gives you more options in the future and you avoid the dreaded electrical gremlins that tend to drive us Liberty owners nuts. Going with the converter opens the door to those problems...

The factory wiring harness literally clips right in. Yes, you need to run the wires up front and through the firewall but it's not that difficult - and since you have the factory hitch it will simply bolt on to the harness box that's already there. And if you add a brake controller later all the wiring is in place to do so.

The factory harness is going to cost you more but it will take no more time than the aftermarket converter harness and it is darn near guaranteed to work - as opposed to the aftermarket ones.

Here is a link to the harnesses. Scroll down to the 7-way round connector - and yes, you'll need the supplemental harness. Lots have tried to argue their way out of needing it but trust me - you need it since you don't have the required EVIC overhead console.

PM me if you have questions or need help installing it.

Bob
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- 3.7L, 42RLE, 4.10's, 4X Guard Trans skid, Factory Engine, T-case, Tank skids, Modded BoulderBars sliders, OME 927/948, Bilsteins, JBA A-Arms & 1/4" top plate, 1 extra rear iso/side, Moabs with Firestone Destination AT's 255/70-16
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Unread 06-05-2012, 03:15 PM   #5
gunterm
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Location: Topeka, Kansas
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I was going to go the 7 pin route, but some info I found made it sound like I'd have to take apart half the insides of it, is that true? Do you have a link to the instructions?
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Unread 06-05-2012, 07:11 PM   #6
95BadBoy
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Always a good idea to check a few of the discount online Mopar parts sites. If you have the part #'s which Bob has in his link - usually will save you a few bucks for the exact Jeep harness needed.

7 pin hookups are almost always a better way to go. Many will have the center pin (pin 7) that have the ability to activate the backup lights on a trailer if so equipped. Handy when backing into some sites at night. The simple 7 to 4 adapters work for any of the 4 pin stuff which I'm sure you already know.
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05 TJ RME 42RLE with some things
05 KJ CRD 545RFE, GDE Eco tune, Franky II, Al's 4.5 A-arms, JK Rubi Moabs, Silent Armors 245-70-17's, Spidertrax Adapters, Rola Basket, Fumoto Valve, Pinch welds pounded

FS or FT (2) JK Rubi 17" Moab Rims - really nice shape
Need JK Rear Spare tire bracket for project
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Unread 06-06-2012, 07:49 AM   #7
gunterm
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Location: Topeka, Kansas
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Anyone know of free shipping deals for any of the mopar sites? Pricing seems to be the same on most when shipping is added.
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Unread 06-07-2012, 01:25 PM   #8
gunterm
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Use code SAVE10 for 10% off $100 or more
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Unread 06-09-2012, 05:51 PM   #9
gunterm
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Location: Topeka, Kansas
Posts: 18
To save money I only ordered the first harness for now, we'll see if it works at all. I don't have the evic but do have those premium features like keyless entry that I hope means I don't need the sup harness.
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Unread 06-12-2012, 02:14 PM   #10
gunterm
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It's here!

First off, all 4 pin trailer functions work fine: LT, RT, and BR. Obviously there's no +12 or trailer brakes on the 7.

The 21' TT is said to weigh 2300 dry by the place that rents it, however I think it's heavier than that; this will be my first experience with a TT so I'll defer to the renter.

They said it's a 7 pin but doesn't have trailer brakes, and would be towable with even a 4 pin adapter. I'm assuming it has 7 pin on it then for backup lights and charging the aux battery?

EDIT: I'm also getting backup lights as well, so the only parts that don't work without the harness are trailer brakes and +12, and there's a aux outlet in the back, so I might just find out which wires are those and rig something up

Last edited by gunterm; 06-12-2012 at 03:13 PM..
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