1999 Ford explorer transponder bypass
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=4183
Printed Date: August 18, 2025 at 11:19 AM
Topic: 1999 Ford explorer transponder bypass
Posted By: brianh
Subject: 1999 Ford explorer transponder bypass
Date Posted: October 04, 2002 at 11:47 AM
I am fixing to install a alarm/remote start on my brothers explorer. Any suggestions on how to bypass the transponder without giving up the key? I have all the wiring info on the vehicle just this last hurddle. Thanks in advance. Brian
Replies:
Posted By: mobiletoys2002
Date Posted: October 04, 2002 at 12:06 PM
there is no way to bypass a pats system without a key but you can try a 555f from dei this is a keyless module that will learn the code from the key and send it back upon remote start but this module has had problems on some fords and does not always work that good. Your best option would be to find a locksmith that can do transponder keys, when you find one you will need 2 working keys and the car and they can clone you a new key. After you get the new key you can get a 555u from dei and put the key in the module this will work everytime and it will keep your transponder factory without any changes. I have found good locksmiths that will clone keys for 35 dollars this is much cheaper than going to a dealer because delaers charge about 60 dollars a key and most want to reprogram all keys for the car and this will cost over 100 dollars so find a locksmith and you will be set good luck.
Posted By: kickyride
Date Posted: October 04, 2002 at 4:22 PM
That's not quite true. Omega R & D has a bypass module called the DB-PKF. It works on the vehicle's databus and doesn't require a key. It runs around $30. To use it, you would need 2 working keys to program it to your vehicle. Any local Omega dealer should be able to get you one. Or, you could order one online from my company. I don't list it on my site but it is available. I hope this helps. Mike ------------- Mike
Sales/Tech Support - KICKYRIDEoCOM mobile electronics
MECP 1st class-Security Specialist
Posted By: Velocity Motors
Date Posted: October 04, 2002 at 4:54 PM
You can bypass the PATS with a spare key and a relay. Basic and secure. The relay will only activate when remote starter is engaged otherwise it is dorment.
-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: brianh
Date Posted: October 04, 2002 at 7:20 PM
Thanks alot for the help guys. This is the first transponder type antitheft system that I have had to bypass. So you say you can get around it with one key and a relay. How so? Brian
Posted By: Velocity Motors
Date Posted: October 04, 2002 at 7:56 PM
You need to wrap the key cylinder with a 22 gauge wire and also the head of the spare key ( or just the chip ) to introduce the resistor to the PATS module. Wire in the relay so that the ground out when running wire activates the relay and use the ignition wire for power only when the ignition is on so you don't have the relay on all the time. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: mobiletoys2002
Date Posted: October 05, 2002 at 6:43 AM
to add to what velocity said the wire you use to wrap around the ignition switch goes to pin 87 of the relay and the other end of that wire that wraps around the head of the key goes to pin 30 of the relay. the key does not have to be near the ignition switch it can be about 10 inches away from it. If you are worried about someone finding the key and using it to start your car then you can cut the key off and just use the head or take the transponder out of the key. Like i had said in my above post if you dont want wire to be wrapped around ignition switch you can accieve a cleaner install using a 555u from dei this will hold the key and have a antenna ring that goes around the key cylinder. Everything is built in to the unit no relays needed only 2 wire hookup and i think it is much more professional looking and performing.
Posted By: mobiletoys2002
Date Posted: October 05, 2002 at 7:35 AM
Posted By: brianh
Date Posted: October 05, 2002 at 1:21 PM
Alright I understand what you guys meant by wire and a key now. I quess thats how the 555u works its just easier to install for some. Does it matter how many wraps of wire around it? I would think that several wraps would be better than a couple to pick up the induced code.(sorta like a electro magnet?) Thanks again for everyones input. Im glad I found this site, I know a good bit about this stuff but there is a first time for everything. Thanks again BrianH
Posted By: Velocity Motors
Date Posted: October 05, 2002 at 2:24 PM
Wrap around key about 8 - 10 times and the same for the cylinder to ensuer a solid signal going to the PATS system. If you already have a spare key with the correct code then all you need is a relay ( which in my mind is cheaper than buying the DEI piece ). If you need two keys to program the DEI unit anyway there's no need to have the second one afterwards. If I were you just take the chip out of the key head and wrap the wire around the chip and then you still have the spare key as a door key. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: mobiletoys2002
Date Posted: October 05, 2002 at 2:52 PM
hey velocity its funny i just had to do a car right now and needed a transponder bypass and i used the wraparound key trick and i think you are right. I used to use the dei piece but i like saving 23 dollars on the piece and using a 2 dollar relay insted.  I always read about it but never liked the way it was done but i do lik eto save money and with a little adjustment of a wire it works great.
Posted By: Velocity Motors
Date Posted: October 05, 2002 at 3:34 PM
Not to mention you said that you don't want the unsightly wires from the key cylinder.... well you don't even see it with the cover back on and the wire is such a small gauge, you really have to know that it was there before you can even see it. Otherwise it's unseen and looks clean. One note about this procedure is that if you can take the resistor pellet out of the key head, the better chance you will have of getting the vehcile to start the first time. Otherwise you have to move the wires around the head of the key until you get that sweet spot where the resistor is located. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: brianh
Date Posted: October 05, 2002 at 5:15 PM
I think Im going to go with the "wire"and key bypass. Jeff what is the best way to remove the pellet from the key? I know that there is a small trap door on the key. Do you just pry it open and out falls the pellet? Im sorry if these questions sound stupid but I just want to do it right. Also do you have to be careful where you mount the pellet? Thanks for your patients on this matter. BrianH
Posted By: Velocity Motors
Date Posted: October 05, 2002 at 11:35 PM
Actually, the trap door doesn't open as easy as it sounds What I've done in the past is take the top of the key to a scroll saw and cut the top portion of the key off ( be careful that you do not cut the pellet ) and then peel back the black portion of the key top until you can get at the pellet. This will still allow you to have the key portion of the key and some of the top portion as well so you have a spare door key. You can mount the pellet about 2-3 inches away from the key cylinder and use hot glue to keep the wounds of wire from coming loose. Tape up this pellet and it will be solid for quite some time. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: brianh
Date Posted: October 06, 2002 at 5:50 AM
Thanks Jeff, Im going to give it a try. I really appreciate all of you help. Ill let you know how it turns out. Brian H
Posted By: Velocity Motors
Date Posted: October 06, 2002 at 9:26 AM
No problemo, let us know how you make out witht his installation. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
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