What am I doing wrong? Remote unlock/lock issue

I've referenced several threads here on adding a beep/buzzer to my 2006 Tacoma. It has OEM keyless entry key fobs. I bought a 120db piezo buzzer from Radio Shack. Ran the positive wire straight to the positive side of the battery with an inline fuse. The negative side I connected to the red/white wire of the emergency flashers connector. The buzzer works fine when I hooked both wires straight to the battery. However after wiring it up, I press the lock or unlock button I only get a very low volume buzz. Almost like electrical noise. I'm not sure what's happening. It's getting a signal because there is SOME noise coming out the buzzer but nothing like it should. Any ideas?

 

check voltage...low voltage, low buzz..

 

Sounds reasonable. It's strange that it's worked for many others though.

 

I did some testing. I thought I might have used too large of a scotchlock and it wasn't making good contact. So I cut the wire and used a crimp to connect it to the wire running to the engine bay. Still just a low buzz. Using a multimeter I found 12V at that wire all the time, using the negative battery post as a ground for the multimeter. The piezo buzzer works on 6-14VDC & 150mA. Any other ideas as to why this won't work?

 

Any ideas? Would really love to get this working. The buzzer I got was a 6-14VDC, 150mA. Is 150mA too high for this?

 

I'm no expert but it sounds like you have this setup backwards. I would think that the positive would come from the "emergency flashers connector" and you would ground the other end. the low buzz would be because the battery is putting out 14V while the signal the computer puts out for the flashers is closer to 12V thus only a 2V difference instead of the 6-14V needed to properly operate the buzzer

 

According to the original post on tn.com, when you push lock/unlock on the key fob it grounds out that wire. Thus grounding the buzzer. There is a constant 12v from the flasher wiring at all times. Although I haven't measured it while pushing the key fob buttons. The low buzz only happens when I push a button, no other times.

 

link to the post you are following?

 

http://www.toyotanation.com/forum/61-2nd-generation-2005-2015/221968-so-you-say-you-want-beep-6.html

His revision starts at post #84. It's an old thread now. I like this method because I rarely/never use my emergency flashers and I can wire in a switch for when I do need them.