I was wondering what year the harness from the cab no longer makes it plug and play to convert from 2 bulb to 3 bulb... I have a 04 with 06 tails and i want to make the reverse light into a amber blinker instead of the reverse light. Im a fan of amber turn sigs and i was wondering if it can be done.

Any help would be great thanks

 

Well, you can either cut the reverse wire, and splice into the brake/turn signal wire, or run a new wire from the front of the truck or the cab to make it a turn signal wire only. If you splice into the brake/turn, your reverse light will turn into a brake/turn also.

 

Ahh i would like the brake light to function solely as a brake light and the turns to function solely as a turn signal

 

Crap i just looked and i have a 5 wire harness why did that have to be only thing other than my steering wheel and dash that got "redesigned"

 

Man I was just about too say if you have 8 wires it would be plug and play. I swapped mine from 2-bulb to 3-bulb and now I'm back to 2-bulb. The 3-bulb harness is just sitting in a tyvak envelope and I was going to say $15 shipped and its yours.

 

Do you know if there are another junctions that might have the wires separated.

A wiring diagram would be great if someone would provide me with one

 

I didn’t read all of the post, in a little hurry…

Take the existing brake/turn signal wires attach it to the backup lights.
At the Brake Pedal Switch - Disconnect the load side of the brake light switch and tape it off.
Run a new wire from the brake light switch load to the brake lights.
Hook up a relay (under the hood) using the old backup light circuit wires for a new set of lights and run a new fused power to the relay and to the new backup lights.

Make sure when you cut the wiring at the tail lights you leave enough for good pigtail off of the light.
Solder all connections and use a good quality heat shrink on all connections, make sure to use the heat shrink with adhesive in it.

Lots of way but this is easy and straight forward.

Mine works flawlessly, knock on wood.

 

What about the Blinkers do i just run wires from the front blinkers to the rear?

 

No !
The blinkers are taken care of by the original Brake Light wire; you cut the original brake light wire at the tail light then splice it to the backup light location.
So in essence the OEM Backup Lights will now work as the brake lights and the directionals. Once you disconnecting the load side of the Brake Light Switch you disable the brake light function and only leave the directionals.
The only wire you will need to run is a new brake light wire from the Brake Light Switch Load side and the wiring for the new backup lights.

This does work, on my ’03 it has worked for almost a year without any problems.

 

About how long did it take

 

Also what color is the load wire from brake light switch?

And also that wire would make the brakes work solely as brake lights correct?

 

Not really sure, I did the change with the StepSide Bed change.
It shouldn’t take that long; if you solder all of the connections at the tail lights it shouldn’t be more than 30 minutes per light.
To run the new Brake Light Wire, maybe another 45 minutes.
I’m guessing but take your time, secure the new brake light wire, make good mechanical connections before soldering and heat shrink all the connections with adhesive heat shrink.
Do not use spade lugs or some other snap together connector, they will corrode over time and cause problems down the road.

Not sure, I work from the stand point of probe the wires and see what you get.
The brake light switch usually has two connections, one hot (waiting for you to press on the brake) and one load the brake light side without power (waiting for the pedal to be pressed so it can carry the current to the lights).
If there are more than two connections on the switch use the probe, write down what you get, one has to be a load for the lights.
Disconnect the side without power (OEM load), fold it back, tape it and mark it so you will remember it is not to be reconnected.
Now just to be sure, clip the probe to the load side of the Switch and step on the brake, you should get a 12 volt reading.
Run the wire to the back !
What color should you use, your call, make sure to write it down in the Service Book for future reference.

Correct.

Sorry for the vagueness but I am not an auto electrical tech or even a hopeful one just someone that uses common sense in my approach.
Probe the switch, write down what you find, work from there.
There are people on this site that have the knowledge of automotive electrical system you want but it isn’t me, sorry…
Ask any questions you want…
This is a great mod and should have been standard on all vehicles.
Statically separate amber directionals reduce accidents.

 

Thank you very much i will have to do this very soon.

 

Keep the site posted on what you do and how it turns out.

 

Alright I will probably do it next weekend cause this weekend ive got some stuff very important stuff to do like clean my truck and go to the Beach

 

btm757,

How’s this going ?

 

Bumping an old thread for a similar question.

If it weren't winter right now, I'd just get into it and see what happens, but I have a set of 99 tails with the amber turns, and I want to put them on my 00 truck. I believe I've got a 2 bulb setup (brake/turn, and reverse), but would an 00 truck have the 8 wire harness, or would I have to go through the wiring modifications?

I'm familiar with separating the brake function from the turns, etc., but I'm just wondering if this is what I should be prepared to do, or if I have a chance at a plug-and-play swap.

Thanks in advance for any help.

 

a 2000 should be a direct swap from 2 to 3. They changed it in like 02 to have a straight 2 bulb harness without the extra wires.

Yours is a simple unplug a harness and plug a new one in.

 

Sweet. Thanks. Now to hunt a pair down. Will a 93-97 harness work? I know a yard that has a few of those near my work.

Worst case, I'm sure I can use the extra socket and wires to repin my harness.

 

I know this is an older thread but I might be facing the same issue. I've got a 2000 ranger that has an 8-wire harness going back to the tail light harness (2 bulb). Would I have to modify anything to make a 3-bulb harness work?