06 silverado service brake system

There's a lot of disagreement over whether or not it's important to power up the brown, second-accessory wire. I never power it up, not just to save time, but also to keep the wipers off during remote start. Other installers always hook it up. At any rate, it wouldn't hurt to connect it if you want to. I've done literally hundreds of those trucks, mostly with the GMDLBP, but a handful with the XK01 as well. I don't remember those modules giving any trouble. About the truck's batteries......well, it is nearly four model years old. The batter(ies) might be near the end of their life anyway. Wouldn't be a bad idea to have a mechanic or auto parts store test them for you before winter hits. The only other possible thing I could think of..... What remote starter are you using? I wonder just how they have their outputs timed....ignition 1, 2, accessory, and so forth. If you noticed, the white Ignition 2 wire gets power FIRST, immediately when you move the key forward from the Off position. The pink Ignition 1 wire gets power LATER, only when the key has moved fully to Run. Most remote starters power up Ignitions 1 and 2 at exactly the same time.....and I've never had a problem with a GM truck because of this. I wonder if your remote starter somehow powers up Ignition 2 a little bit late? Also, I know you've tested the white wire in the truck during remote start....but, I should have mentioned this before: Have you also verified that it maintains power during cranking? Some remote starters have an "off during crank" or "as accessory" setting for Ignition 2 in their programming menu.....that could get you screwed up if you turned that on by mistake. Here's something else you could try: Prepare a jumper wire (preferably fused). (If you have a jumper wire with an old toggle switch, that's even better.) Using the jumper wire AND the remote starter, try to emulate the truck's factory behavior of powering up the white Ignition 2 wire before the pink: 1: Connect jumper wire from constant power to the white on the truck. 2. Activate remote starter, let it start engine and run. 3. Now, remove jumper wire and let the remote starter run the truck on its own. 4. Repeat this several times......see if it makes the problem go away. If it does, maybe you could use your remote starter's "ground when running" output and a relay, to power up the Ignition 2 circuit on the truck a little early.

Correct, I do not do this for a living. I am a mechanical engineer, professionally speaking. If you ever have any mechanical questions, I can certainly try to answer them. I have read that the WTS light can cause problems. Do we know what actually causes the problem? I am going to investigate the timing of the ignition wires. There may be something to that. The system is a Viper 5301, and I believe that the ignition 2 settings are still set to default. Thanks again for the help.

Chris, Quick thought here: If ignition 2 is being powered up before ignition 1, could I just swap 1 and 2 at the plug for the remote start module? I still need to get out and test the timing. I only have one test light, so may need to pick up another (it's too difficult for me to monitor a Fluke and a test light simultaneously). I've got my batteries out right now, running through a de-sulfate cycle before the extreme cold weather we'll be getting. If no one has tried one of the new style switching battery chargers (usually called smart chargers) they are worth a serious look. I have pulled batteries from salvage yards that cost me $5.00 because they were only good for a core, put them on my charger set to recondition, and had two years of successful operation from them. Technology is amazing. Anyway, I will try to get a handle on the ignition 1 & 2 timing tomorrow. Just thought I would throw out the switching of the wires idea. Thanks.

tach wire wont cause any issues  (certainly not the one you are having)... i have done many of these vehicles (03-07 C/K's) with the 5301 and XK01 and never had any issues.... i prefer the XK01 for these vehicles (running D2D)... i also never power the Brown 2nd Acc....with no issues.....Kevin Gerry

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