2012 tacoma viper 5704 and pkall

They aren't aftermarket the lights come LED from the factory. So your saying my brake lights are back feeding to the vipers brain and shutting down the remote start.

I just got finished checking my starter and ignition wires based on the trouble shooting checklist from the viper manual. When I checked the violet wire on the starter side with the remote start i don't get any voltage, all my 30A fuses are good. When i use my key in the ignition and crank I see cranking voltage on starter side and key side. All my other ignition wires checked out.

Have you checked remote start shutdown/startup diagnostics, after failure the unit will click and flash your lights a number of times telling you why it's misbehaving.

Howie, I pulled the codes yesterday and I have #3 Low or No RPM and #4 Transmitter shutdown (or optional push button)

Disconnect the tach wire and reprogram as virtual tach. The current car had a Clifford with Intellistart lV, then a 5904, now a month ago a 5906. Earlier this week the R/S decided it wasn't working, 10 day old battery, yet first low revs then low voltage. That's what I did and now we are happy again.

Ok I'll try that. When you do virtual tach the violet/white wire just needs to clipped and taped off? Or do I have to find another tach source I have my tach source from the OBDII connector.

Yes and AFAIK tach wire, pin 9 on the OBD ll Toyotas, BMW is the best place to pick up tach. Please don't tell me that with a 1 week old new battery my 5906 from out of the blue suddenly doesn't recognise tach? Methinks something spiked it.

Thanks Howie for your help I will try that this weekend.

I think may have found my problem, while doing some research at work I went the xpresskit website and found out I need 2 keys to program my bypass module. My question is If I already programmed it with 1 key do I just disconnect the module and repeat the steps for the second key? Xpress Kit

That is the problem with XpressKit, their WEB site and manuals are very confusing. You really have to be reading the fine print with this vehicle. If you open the PKALL Install Guide you linked to, you will see that for Connection Type and Programming Type it points you back to the XpressKit WEB site and the generic PKALL info. From that point you should click on the Download Manual tab at the middle of the page and then click on PKALL and then scroll down to Toyota Tacoma G Key 2010 - 2011. That will allow you to click on the actual Install Guide ( http://www.xpresskit.com/DocumentDownload.aspx?documentid=7017&productid=196&firmwareid=1636 ). I believe that this guide also applies to the 2012 Tacoma. Page 1 details the needed wire connections and Page 2 shows the module programming. It looks like you only need one key.Soldering is fun!