viper 5900 no warn away?

Diesel wait-to-start wire isn't necessary, and in fact on many vehicles isn't even possible(the indicator light is controlled via a data signal)...the 15 second timer is plenty sufficient for getting a diesel to start properly. Best to remove the wire and forget about it. As far as the warn-away, it's really no big deal which way that harness is connected(the green and blue wires both output the same signal from the shock sensor). The more important thing is the shock sensor sensitivity, and where it's mounted. Where is the sensor itself mounted to? C Renner's Auto Electronix

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chriswallace187 wrote: As far as the warn-away, it's really no big deal which way that harness is connected(the green and blue wires both output the same signal from the shock sensor). The more important thing is the shock sensor sensitivity, and where it's mounted. Where is the sensor itself mounted to?

The way the harness is connected certainly does matter. The "loose" wire in the harness plug should be on the brain side. The "looped" side of the harness should be on the shock sensor side. If you have it reversed, warn away will not work. Once you have it connected properly, you will need to adjust the sensitivity dial. I have always had good success with mounting DEI shock sensors to a thick wire harness with a 14" tie wrap. It needs to be a sturdy harness in the vehicle. Make sure you wait at least 20 seconds after arming the alarm before hitting the truck to test the sensitivity.

JWorm, where are you getting your info in re: the shock sensor harness? I've always been under the impression that the alarm brain chooses warn-away or full siren based on the duration of the signal received from the shock sensor and not on which wire the signal came through. Agreed totally on tying the sensor itself to a big harness...DEI's sensors don't work worth a damn when mounted to metal.C Renner's Auto Electronix

My service is cheap, quick, and good - pick any two

JWorm has it right. The loop needs to be on the sensor side and the open wire on the brain.boosh!!

This is how the sensor inputs on DEI systems work. One wire (the green wire) coming out of the shock sensor is for warn away. If the shock sensor detects a slight vibration it will send a short pulse ( less than .8 seconds ) down the green wire. If the shock sensor detects a big vibration it will send a long pulse ( greater than .8 seconds ) down the blue wire. If you connect the harness correctly, those wires join together and go to the same input coming out of the brain. The alarm brain determines if it gives warning chirps or full trigger by the length of the pulse. Either way, zone 1 gets triggered on the remote. If you have the loose green wire in the harness connected to another similar sensor ( let's say a 508D motion sensor) it works the same way. Both the green and blue from the 508D are connected to the green wire in the shock sensor harness. The brain determines full trigger or warn away based off of length of pulse. Since it sees the pulse on the blue wire, it triggers zone 2 of the alarm. I have no idea if a Viper 5900 remote reports which zone was triggered, but this is how it works on a Viper 791xv, Python 881xp, etc. If you have the loose green wire in the harness coming out of the shock sensor it pulses a short pulse on that wire every time the sensor gets a light impact. The wire goes no where, so the alarm does not report the light impact.

That makes sense...haven't done DEI in a while. It really doesn't make sense to have the green wire loop at all if everything's on the blue wire. Mea culpa.C Renner's Auto Electronix

My service is cheap, quick, and good - pick any two

Not everything is on the blue wire coming out of the shock sensor. Only full trigger is. The green wire coming out of the shock sensor is warn away. The warn/full trigger outputs are on separate wires making it possible to use the shock sensor with a non-DEI alarm. I've only done one DEI in about 3 years, but I can still do one in my sleep because I did them for 6 years. I use Compustar now.