09 Toyota Tundra, Compustar troubleshoot

I need some help trouble shooting a major issue I'm having with my 09 tundra compustar install. I have installed car electronics for a quit a few years on and off as a hoby and am knowledgeable about what is going on and always use my multimeter to test connections before they are made. Prior to my compustar install I had a very extensive wiring diagram so it made it quit easy. Here is what happened, I got everything up and running after about my 3rd or 4th test start (they all were worked fine) during my last test start suddenly my truck shut down. I would stop the starter by pressing the remote button. After some panic I realized the battery was dead. I'm guessing this happened because I basically had the door open for a day and half and the interior lights were on draining the battery. After charging my truck over night I realized that my radio wasn't turning on and other ACC items weren't working associated with a specific fuse. I checked all the fuses and they were all good and double checked my wiring. So I had to bring it into the dealer to have it looked at and luckily they covered a MAJOR electronic failure. Here is what was found, I needed the drivers side junction block replaced, also known as the block assembly ($470 item). Here is what the tech wrote in his notes: "remove rt kick panel to check accessory cut body ecu to check beige wire at body ecu. power is supplied to beige wire at connector dd pin 45. check fuses and wiring to individual circuits. no power being applied to fuses for cig and 7.5a acc fuse. internal accessory relay failure. replace body module and working. So my take is that just before the fuse some electronics got fried, which leads me to think my ACC connection had something to do with it or maybe the hard shut down of my pick up? Really not sure. Opinions?

Well what can i say beyond many have been done this install in this truck and have not had an issue so the logical conclusion is something was wired incorrectly or the product malfunctioned. The junction block is just that, place where current and signal get dispersed to different areas of the truck. My guess is something was incorrectly wired and fried a trace line on some board in the block and it had to be replaced. I doubt there is an actual "internal accessory relay" but i guess there could be. Most relays are replaceable as it is a moving part. You say you double checked your wiring, are you sure it is correct to begin with?Mike M2

Tech Manager

CS Dealer Services

I double checked all my wiring after the fact but before I try to start it again I'll recheck. What I take away from the tech's report is that the ACC connection is what went bad, so is it possible that the brain sent to much voltage over the ACC connection while it was under the remote start power? I installed the same model remote start on my 06 civic and never had issues. In fact the only issues I've ever had when installing something is a car is blowing a fuse which can easily figured out. Should I check the voltage on the ACC connection from the brain? Not sure how to do that with out having it start the car and send the signal. appreciate the responses