I hope this post finds everyone doing well and staying safe.

I have a 99 Ford Ranger XLT 3.0L V6 Sport. Any insight would be appreciated as car looting and theft have gone up in this neighborhood since the pandemic.

What I'm trying to do is wire in one of those remote / wireless kill switches in-line with the inertia switch (I'm thinking of mounting it behind the kick plate to the right of the switch near the passenger door).

My question is about what wires to tie it into. From what I've read, there are two different sets?

Any information at all would be really appreciated as I'll sleep better at night once the switch is in place!

 

Welcome to the forum

1999 Ranger 3.0l XLT will have PATS(passive anti-theft system), it was an option in 1998 but all Ranger V6 models had it in 1999 and up, 4cyl didn't and some XL models, Ford calls it SecuriLock

So yours already has better than a kill switch, it kills fuel injectors so there is no "work around" for that, you can hot wire starter and fuel pump, but no way to hot wire injector timing pulses

PATS uses "transponder" keys, each key has an RFID tag in its handle, no batteries needed, it has a unique number
When you turn the key on that number is read by an antenna loop around the key slot
The PATS module(above glove box in 1999/2000 Rangers) then compares that number to the 3 or 4 numbers that were programmed into its memory at the factory(the 3 or 4 keys the Ranger came with when new)
If a match is found then PATS module "tells" Computer "OK to start"
If no match or no number, then there is no "OK to start" message and computer stays OFF, AND ....a THEFT light on the dash will start to flash rapidly

You should see THEFT light come ON and then go off with key on, IF your key was recognized

You can add more keys, well a locksmith can if you only have 1 key, you should always have a spare key or you will need a mobile locksmith to come to vehicle location to make(cut) and add a new key to PATS

You can test your PATS system by wrapping key's handle in aluminum foil and then put key in and turn it on, should see flashing THEFT light and maybe a no crank, but for sure a no start
In 1999 some PATS also disabled start motor activation, but not on all models


So a fuel pump Kill switch would be redundant on your model, computer turns on the fuel pump with key on, but wouldn't turn it on if PATS didn't send the "OK to start" message


PATS is "passive" so not an alarm
An active alarm might be a better way to secure your vehicle, i.e. flashing lights and horn honking

And just a heads up, if someone tries to start a PATS vehicle 3 or 4 times with Flashing Theft Light each time, PATS will go into LOCK DOWN mode, so computer will stay off for 90minutes even if correct key is used it won't start
No way to reset that 90min, even unhooking the battery won't help