LOCK/UNLOCK Chirp for DTRL and Alternating turn signal modders

So i was killing some time today and made my way into radioshack....was initially looking for a switch for my new KC lights. that hunt failed but i did stumble upon something else. I saw some of the piezo buzzers that are used for the lock unlock chirp. I said hell why not, and spent the 3 bucks on one and decided to piddle around with the mod when i got home. Well unfortunately I got home and checked about wiring it up with a switch to the flashers and realized, "i've done the dtrl and alternating turn signal mods, due to the fact that they all share a common ground and power supply, you can't wire in a piezo buzzer without it going off with the turn signal too!" we'll i would not accept defeat so i got the link for the FSM (factory service manual) and started reading wire diagrams (lucky for you i know how to so you don't have to). Heres my approach to the LOCK/UNLOCK chirp mod so that you can keep your other mods intact.

First you will need the following supplies:

1 piezo buzzer for unlock OR lock/ 2 piezo buzzers for both lock and unlock
wire caps and electrical tape/ or soldering iron and heatshrink
wire....
wire cutters and strippers
10mm socket wrench
flat head screw driver
phillips head screw driver
duct tape
3m foam tape
patience


Here it goes!

Here is the piezo Buzzer:



First, remove your drivers side door panel following this thread:

http://www.tacomaworld.com/forum/audio-video/3198-speaker-upgrade-basic-how-2nd-gen-access-cab.html

Next get your wire and get ready for the hardest part. running a wire through the waterproof wire loom between the door and the body:



remove the speaker for better access to the loom (rubber thing)
as you can see, I used a blue and silver wire set up (using blue as my positive and silver as my negative) once you get it through that loom pull the wire out the door (look on the left side of the door, you'll see that gray metal panel and where i pulled the wire through.) I pulled the wire this way so that it did not interfere with the window rolling down in any way.



pull the wire up to where the LOCK/UNLOCk motor is (furthest left plug)

If you look at the wiring harness plugged in there, there will be several wires. First, look for the blue/pink(or red) stripe wire. This will be the positive wire. Next, lookd for the blue/black stripe wire. this will serve as your ground.

Next, get wire splices like this the following picture and connect your positive (blue in my picture) and negative (silver in my picture) wires like so:




To make sure this has spliced correctly, test your buzzer attached like this:

and hit the lock button. You should hear a loud beep.

undo that connect and run your new wire through the fire wall through the big grommet like this:



YOU'RE ALMOST DONE!!!

run the wire along the side of the battery and under neath the lip towards the radiator. Time to get the double sided tape (3m foam tape). Apply it to the back of the piezo buzzer and mount it like so:

(note: i took this picture after I had wired it up)

Tape the loose hanging wire with the black wire in the picture so nothing is hanging around (be sure not to cut your wire too short....leave some extra. I'll explain why in a minute.)

Now heres where I've got to do some explaining. After reading the FSM and playing with my multimeter, I learned that the locks will "lock" when a current is sent through them in a positive polarity (From A to B). Lucky for us, they "unlock" in a really easy manner. rather than controlled by the ecu by code, the ecu just sends a current through the circuit in a reverse manner (from B to A, or just backwards). So here is where you can use just 1 piezo buzzer or 2.

If you want the buzzer to beep when you LOCK THE DOORS, attach the buzzer to the wire you ran like so:



Keep in mind the blue wire is positive as well as the red wire. When you use your keys to lock your truck, you will hear a beep.

If you want it to beep when you unlock it, wire it like this:



see how the red postive wire on the buzzer is wired to the silver wire, which is what I considered my negative? This will make the buzzer beep when you hit the unlock button on your remote once.

Now if i have taken in anything from my circuits class, If you want it to beep when you hit the lock button and the unlock button. All you have to do is wire the postive (red) wire from one buzzer and the negative (black wire) of another buzzer to the silver wire (what i considered the ground/negative) and the black wire from the first buzzer and the red wire from the second buzzer to the blue wire (what i considered my positive). If this doesn't work (i'll try and test it tomorrow and let you know) the worst thing that could happen is you'll pop a 20A fuse in the fuse box inside the truck (learned the hard way today).

Now i know i said i did it this way cause i have those other mods done, but honestly, why try and wire this to the 4way flashers and have to use a switch so it doesn't beep when you need the flashers on in an emeregency. The only downside to my mod is that it will beep when you lock or unlock the car from the inside.

I'd post a video showing it working, but i don't know how to and you can take my word for it.


EDIT: I got the other buzzer and tested it in parallel like i said above and it works flawlessly.

One beep for lock
One beep for unlock
two beeps for all doors unlocked.

 

going out to buy the other buzzer right now!

 

Nice! Added to the cheap/free thread!

 

Very nice. Added rep for this one!

 

Sweet! I plan on another good write up next week too!

 

awesome write up.

 

very cool! I think i might have to do this one

 

Awesome write up Paul. We can do that to my truck on mod day (if we can get one together). Rep coming to ya



edit: Rep wil come once I can get some more

 

updated. see end of first post.

 

Nice!

 

If I could I'd rip the one off my 09 and give it to someone. I fuckin hate that thing, it's annoying as hell. I don't even use the keyless entry anymore because of it, I just unlock it manually with my key.
Maybe yours won't be so bad cause it only beeps twice, mine beeps 4 times, and it's ridiculously loud.

 

http://www.tacomaworld.com/forum/2n...-when-i-lock-unlock-my-taco-3.html#post394687

post 43

worked like a charm and litterly took less then a minute

 

quick question....
lets say i am driving, i pull up to the woman's house with the engine running and unlock the doors (so she can get in obviously lol) will it beep when i do so?
lmk still on the fence debating whether or not to do this mod..

 

Yeah it will beep. Better than hooking it up to a blinker though if you ask me. For the most part the only time I lock and unlock the car is when I am not inside it.

 

Only when you pull up to the lady's house will it beep.. now if you're pulling up to another lady's house it'll wolf-whistle. It’s true. It really happens that way. I don’t lie. Everything you read on the internet is true.

 

lmao..what model piezo makes that sound?
jk

 

thanks man

 

you can find them on craigslist. Shady piezos..

 

Ah..... Good to know. We have 3 kids so I use the power lock buttons quite a bit.

 

that could be a problem pt. I read over the fsm multiple times about current locations when it's locked and ublocked. I really wanted to hook it up to where the wireless sensor was bit it only had a constant 12vdc source.