DFlintstone

To Tap for connect trailer wiring to 1990 Jeep Cherokee;
My searches and my diagrams didn't get me the colors, or where exactly to tap in. I found the five wires, (ground, left, right, brake, and parking), to connect to a five to four wire converter for my four flat wire, two 1157 bulb trailer.

These plugs are both found under the panel behind the spare tire.
Four are found at the easier to reach six pin plug for the Left Taillight Assembly. Then just the one last one for right signal comes from the 10 pin connector for the right. (Beat's me how a "plug and play", connector would work)

*TEST YOUR CONVERTER BEFORE YOU GET TOO FAR. (after the wires are stripped) You don't want to do all this work then find its bad.
*Plumbers, put down that flux! Acid might not be good for stranded copper. Use rosin core solder.
*Smoke and fumes from that, or any burning insulation are no joke. Do whatever you need to do not breathe it! Really, it's really bad stuff.

I used Converter> http://www.ebay.com/itm/172621121891...%3AMEBIDX%3AIT
And (extra bright) LED bulbs> http://www.ebay.com/itm/201320728513

Here I strip some insulation on the Jeep side, near the plug and solder. Bummer we can't use shrink tube! Tape is it.
Going with LED's now on the trailer, regular bulbs work, but blink a bit faster. (low draw LED's don't do that).

Utube of where I stripped to solder the five wires. I staggered the cuts to feel better about needing to use tape. At the end I mention my own attempt at a relay solution for a substitute for the box. FAIL!

And here the Utube of the soldered and finishing.

Please post up a better angle if you've got one!

[BRAKE, BLU-T]**[LEFT TURN, GRY-T]**[RIGHT TURN, BRN]**[PARKING, BLU]**[GROUND, BLK] Again, Right turn is on the 10 pin plug.
["T" means it has a black tracer stripe]





With (preferably) quality strippers, cut then pull to separate the insulation. I did about 5/8-3/4" "openings".



Cut very carefully. Take your time here.


Staggering cut's down on any chance them contacting, and also makes a neater "gang" in the end.



Be sure the solder is smooth with no spurs or wires to poke through tape or anything. The smoke and fumes are toxic, I avoid even a little wiff of it!


Next I wiped clean and wrapped each connection in 1-1/2" or so of tape, then wrapped the works.



Next I made a "raincoat" for the converter box. Water has been running down the wires going up the pillar. The mylar type stuff from a large bag of vacuum packed coffee is something I had handy. I siliconed the top of the box and in between the wires, but left what looked like openings on the bottom of the box open.
I suspended it from the tube to the rear squirter. One zip tie makes a loop around the harness and the tube, holding it above waterline



Notice where mice have left tracks up my rear axle! ^^



Now, bumper to bumper I have the Jeep fully prepared to show the maximum improvement from a thorough cleaning! Going at it with the right stuff and the converter in hand I'd allow 1/2 a day


A poster with an 88 commented; " the positions of the wires are not the same as your diagram on one or two wires, so just go by the colors and splice ahead of the connector". Thanks Bullhamer!

djgrayxj

Note from DJ
We have a helper like yours.

nujeepguy

i cant help,,but it looks like the cat has it figgered!

DFlintstone

If (Calamity), Jane only knew. She is so shy, HERE nobody ever sees her but me, and now worldwide! (Yep DJ bit of a lookalike) Jeepguy, (funny!), naw, she'd be wearing her glasses if she was serious.

A five to four wire conversion can also be done with four common SPDT cube relays, instead of a store-bought converter. Here you need a power wire back there, (so really six wires). I suppose you might need to add just one fuse for that. It IS clever. You could just change cheap relays with any problem. (the relays don't need to be the type with a diode, like these shown here have)

djgrayxj

Note from DJ
If you already have the 5 pin connector on the 90 this information may help.
I Want to Connect a 5 Pin Vehicle Connector to a 4 Pin Trailer Connector No Brakes on Trailer
https://www.etrailer.com/question-46983.html
There are many different ways that you can connect the 4-pole connector on your trailer to the 5-pole connector on your vehicle. If the 4-pole and 5-pole connectors on your vehicle and trailer are the flat style connectors, then you could simply plug the 4-pole trailer connector into the 5-pole vehicle connector. Doing this would leave one slot exposed on the vehicle 5-way connector, but that slot is usually attached to the reverse light circuit which you do not need. In some cases the connector on the trailer may have extra plastic molding that may not make them directly compatible, but you could replace the connector or use a utility knife to trim down the extra plastic.

Another option would be to add a 5-way connector to your trailer like part # HM47910. This would give you the additional connection if you wanted to add brakes to your trailer in the future. If you did not want to add trailer brakes, then you could simply tie off the brake wire and tuck it away. This would give your trailer a 5-way connector like your vehicle.

DFlintstone

EDIT! DJ starts with "if you have 5 wires, I didn't see that there at first! The rest of this tread is off topic, no loss to just skip it. (DJ's #8 does show the seven pin layout though)

Mark the Calendar? Did DJ slip? Our separate amber signals make a mess of it, (or a puzzle), going to standard 4 wire for two 1157 bulbs. We don't have a "stop and turn" wire. I think he is talking about a normal, (1157 signal type) setup, where our Jeeps have separate 1156's for signals. (so we have five just for lights). Trailer brake would make six......

djgrayxj

Note from DJ
If you already have the 5 pin connector you may already have the converter box that solves the separate amber signals light problem.

djgrayxj

Note from DJ
If you don’t have the converter box Jeep also offered two different Trailer Towing packages.
My 88 had the 7 pin round version and after a lot of different attempts to adapt it to my 4 pin flat boat connector I bought a 7 round to 4 flat connector no converter box was needed ant that worked.

cruiser54

Napa has them.

DFlintstone

Napa here said they don't carry a 5 to 4 wire converter. Maybe I asked for the wrong thing? Where to hook it up was the main point anyway. I did find "new, old stock" or somethingorother, Napa, at a good price>> http://www.ebay.com/itm/172621121891...%3AMEBIDX%3AIT

DFlintstone

Mine didn't come with a tow package. I suppose if it did it should have some magic going on to isolate the functions in there somewhere!
On a four wire trailer the blinker and the brake both use the same nub on the 1175 bulb (for the shorter, brighter inner filament). Both wires effectively going to the same place, and the fact you can't connect them is the rub. Yours had to have something, it just can't be done straight off the Jeep wiring (without 5 wires and a third filament/bulb each side on the trailer), is what I'm finding. ( I DID hokey a straight wired, 5 wire setup, with extra lights for my trailer I've been using for 10 years. that was on my old 90, the new 90 is getting a cleaner setup!)

EDIT: Adding..There in that diagram, the 5 and the 6 do not exist on a non tow-package Jeep, being that signal and brake use different bulbs.

cruiser54

I typed "5 wire to 4"

and Google gave me this page.

https://www.google.com/webhp?sourcei...iler+converter

DFlintstone

Funny! Yea, when I go there half the links are purple because I've already been there. It's where to connect, and the colors of the Jeep wires to tap that you won't find anywhere. (I did find a few posts by you on various forums, at least one dealing with some *** that wouldn't get it he needs a converter!)

Plan is NOW someone searching will find the answer here. This confusing part of the thread shouldn't hurt anything.

cruiser54

Just go buy one already!!!!!!!!!!

KaMoore

Just buy this from Quadratec.

http://www.quadratec.com/search/92015.10