2005 nissan titan remote start trouble

ok got the relay, before i hooked it up, tried the remote start to make sure it was in the same shape i left it (starting then shutting off) I noticed that the antenna wire was off so i plugged that back in, went to start it, then the r/s clicked like it was gonna turn on, the dash/parking light/gauges turned on like normal, then shuts off and wont stay on to even engage the starter. it just does this over and over, wont stay on for more than a second. so i hooked the relay up and can't even try it. what could be going on. I havent even touched this thing for a few days. all the wires appear to still be connected and fuses are good, i have over 12 volts at my 2 12 volt line, i have 12 volts at my 2 accessory lines when the power is on, 12 volts at ignition line and when i engage the starter, line reads the voltage, where am i messing up?

Take the key and set it in the igntion switch without turning it on. Will it start?Mike M2

Tech Manager

CS Dealer Services

no, i tried doing it in the off position, acc position and on position and nothing on any of them. it bugs me out cause just yesterday i would r/s start it and it would fire up but stall out so i was told i needed to add a relay to the 2nd starter wire and before i even touched it, i tried to start it and it started doing this

anyone have any ideas?

What do you mean by a second? Is it coming on for a quick fraction of a second? If so, check the brake wire for 12volts. Is it coming on for a few seconds like it will start then just doesn't crank? Check the main connections at the ignition switch. Also check power on both power wires including fuses....Mike M2

Tech Manager

CS Dealer Services

ok i have 12 volts at both the red lines, when i hit the remote start button it stays over the 12 volts . when i check my first and second accessory lines, then try to remote start it, it jumps to maybe 8 volts but everything shuts off before it can reach 12 volts. i press the remote start button and the r/s clicks normally then the dash/parking lights come on as if it was going to start, then the gauge lights come on as normal, but they stay on only for literally a second then the whole thing shuts down. ill check the brake line right now

in addition to my above post, all that stuff happens normally, then when the gauge lights come on, usually its for 2 or 3 seconds before the starter engages but it doesnt make it that long, as soon as the gauge lights come on, it shuts off

also i failed to mention when i do the diagnostics, it comes back for code six, which is (+/- Shutdown)

ok got somewhere new, my brake switch wire wasnt making contact, solved the problem, but im back to square one now, which is better than the negative one i was at. The truck starts with the remote start and runs for maybe a second or 2 then dies out. sometimes if i try to start it 5 or 6 times it will stay running but not everytime, only after a few tries, ive relearned the tach settings but no change