This may be in the wrong section, Ron, feel free to move if need.

But, I decided to add the DEI tilt and motion sensor to my Viper 350r. I have the tilt sensor all figured out. But the wires on the motion sensor have me a little confused. I know the red wire goes to the red (+)12V Constant on the alarm harness and the black goes to the orange ground when armed on the main harness. It`s the blue and green wires on the sensor that has me confused. Do I connect them to the green and blue wires on the main harness? AND, I would like to use the warn away on the alarm...


EDIT: After reading the manual, I may have figured it out. But if anyone has any input on this, I would definitly appreciate it.

It`s an EJ1, btw...

 

Which motion sensor?

If it is a single-zone sensor, you can connect the blue on the sensor to blue on the main harness (- instant trigger) and diode isolate.

If it is a dual-zone sensor, you will connect the blue to the brain using the 4-pin harness that should have come with the sensor (this allows for multiplex input). It is not necessary to connect the green - this is for a second sensor and not dual-zone functionality.

Even with the 4-pin connector, you are correct by using separate +12V and GWA from the main harness. The fine print in the 350 manual states the 4-pin connector does not provide enough current to drive a motion (radar) sensor off the 4-pin connector.

 

Sorry, should have stated that before. I got the dual zone 508D.

I would love to connect the sensor to the brain but, there is no other open port on it. There is a green and blur wire that comes out of the main harness and the manual said that they both are (-) multiplex. I thinking I could just tap into those wires...unless I`m missing somehting

 

Just to be sure... This is a R350 ("Responder 350") model, correct?

 

Yea..sorry, long day at work.

EDIT:

 

What sensor is currently using the 4-pin connector? -- Just so I'm clear, you have/are aware of the 4-pin connector but it is currently occupied by another sensor (?).

This port can actually accommodate any number of sensors if they are properly wired and diode isolated. (DEI provides a "Y" cable with certain sensors for this purpose. They don't provide one with the 508D due to current draw, but you can get around this like you did by wiring +/GWA to the main harness.

AFAIK, the instant trigger (blue) on the main harness is not a multiplexed input, only the blue and green on the 4-pin sensor harness.

(I have the same alarm with the 508D and multiple sensors).

 

That 'Y' cable though, I clearly don`t have...

How do you have the 508D wired? Do you have it using just one zone? Or did you manage to get the dual zone to work?

 

I keep reading the little peice of paper they gave me with the 508D. This is the one line that I need clarification on: "If you are using the 508D with a DEI security system, (which I am), that has a multiplex input, (which I am like 90% sure that`s the blue wire on the main harness), you can connect both the BLUE and the GREEN wires to the multiplex input"...

So does that mean all I need to do is to connect the red-red main harness wire and the black-orange. And then, splice the green and blue wire on the sensor together and connect that to the blue wire on the main harness?

Mind my ignorance, I just want to do this right the first time.

 

Negative if you're running the Responder 350. Your multiplex input is the blue wire on the 4-pin connector. You don't need the Y cable if connected as below (you de-pin an existing wire and add another).


Dual zone works. This is where is gets confusing:

The 4-pin connector has a blue and green wire. *Each* wire is a multiplex input, meaning, *each* wire can report _both_ the inner and outer zones of the 508D. It does this based on the pulse width of the sensor's signal to the brain, NOT which wire provides the signal (they both do in tandem).

The green wire on the 508D is superfluous, and duplicates exactly what the blue wire does (goes high when blue goes high). The blue and green wires DO NOT represent the inner and outer zone. There are two wires to allow the use of the "Y" cable to easily connect two sensors.

So, --

1. All your single-zone sensors (hood pin, tilt, battery backup, etc.) should connect to the blue (-) instant trigger on the main harness, each diode isolated with the stripe facing away from the brain.

2. The 508 and second 4-pin sensor is connected as follows:

a) At the "brain-facing" end of the 4-pin cable from the 508D, the red and black will be removed (cut) from the plug and connected to the main harness.

b) Either the blue *OR* green wire from the 508D will remain connected to the "brain-facing" end of the cable, the other will be removed.

c) The other sensor using the 4-pin connector will be connected exactly as the 508D, but using the complementary color on the "brain-facing" connector (ie. if the 508D is using the blue, the second sensor will use the green).

If you're running more than one sensor off the GWA, these also need to be diode isolated, but with the diode's stripe facing *toward* the brain (opposite of the blue instant trigger).

Both zones of both sensors will report if connected as above.

 

Crude diagram comming up....

 

I`m making one myself...But I`ll wait for yours haha.

 

Orange = GWA (ground-when-armed) on main harness.

Black arrows = 1A diodes, arrow facing stripe

 

Ok, so I went out to the car and looked at the 'brain' and there seems to be a 4-wire plug that the manual says is for a shock sensor. I`m going to assume that that is the wire that I need to connect the blue wire from the 508D to. Than the black to the gwa on the main harness. Will I need a diode for that if there is only one? Than obvisouly red-red. And not worry about the green, correct?

And just making sure my tilt sensor is hooke dup correctly: I have the red to red, blue to the main harness blue, and the orange to the gwa. I don`t have a diode on the orange to the gwa.

 

Right --

That 4-pin connector is what is going to go to your dual-zone sensor(s). The sensor should have come with a 4-pin cable. If you only have a single dual-zone sensor, you can leave both the blue and green connected straight through, and connect black (to orange)/red to the brain.

Your tilt sensor is connected correctly. The diodes are required as per DEI ("by the book"), but the only one absolutely required for proper function is on your trunk trigger if connected (otherwise, your trunk light/dash indicator will turn on when other sensors are tripped, ie. your doors are open).

If you are using any kill relays on the GWA, you need to diode isolate everything on the GWA.

 

The second partof your post I get. I am not using any kill relays yet. Maybe later on down the road.

The first part however, I`m a little confused. The 508D is a dual zone motion sensor.

Just to make sure I have this right:

Blue from them sensor 4 pin wire goes to the blue on the four pin coming out of the 'brain'> Orange from the sensor connects to the GWA > Red from the sensor goes to the 12v constant from the main harness.

And connecting it that way will allow me to utilize the dual zone functionality?

 

On the sensor cable, there is red, black, blue and green.

1. Plug the large end of the 4-pin cable included with the sensor into the sensor.

2. On the small end of this cable (that goes to the brain), you are cutting the red and black wires. The red is connected to red (+12V) on the main harness, black is connected to orange (GWA) on the main harness.

3. Green and blue will be left in place on the small and large ends of the connector, and the small end will be plugged into the 4-pin connector on the brain.

Remember (^ this was the "confusing part"), the inner and outer zones are controlled by the pulse width of the signals on the blue *OR* green wires, not which wire (blue or green) shows ground when triggered. That is what is meant by "multiplex" (a single wire carrying multiple signals). The green wire is simply provided for backward compatibility with older model alarms and is not needed for the dual-zone functionality (but will not harm anything to leave it in place, either.

If you ever decide to install kill relays (you should, otherwise you just have a noise-maker , you absolutely must diode isolate your GWA connections or your alarm will release all magic smoke.

Wired this way, dual-zone (inner and outer perimeter) will work 100%.

 

Awe, but I like the magic smoke HAHA.

But ok, that makes sense. I just have to double check where the four pin wires are going to later this morning...when it`s daylight out.

So if worst comes to worst, I can just splice the blue wire from the sensor wire to the 4 pin blue wire coming from the brain.

Appreciate the help. Much better than paying some idiot at Best Buy to do it.

 

Is this sensor already connected? You shouldn't need to splice the blue or green if this is a new install.

Gimme a sec...

 

No, only the tilt sensor is.

With that said, I shouldn`t have to splice anything. But I`ll give you the sec lol

 

The first picture shows what comes with a new sensor. The sensor itself, and a 4-pin cable.

The second picture shows how to connect the small end (on brain). Don't splice the green or blue - leave them connected straight through. You will need to move the red and black on the small end, to red and orange, respectively, on the main harness. Don't change anything on the end connected at the sensor.

 

I feel like an idiot...the pretty pictures makes it make sense. I def. appreciate it

 

You know what I don`t get though? Why do they supply a four pin wire for a shock sensor if our 'brain' has one built into it? Or is that meant for additional accessories?

 

Because not every alarm model has the sensor built-in. The R350 does, though.

The manual calls this a "shock sensor" connector, but this is a misnomer, as all the external sensors, except the tilt sensor, connect here.

 

Cool, what seemed like a 3 hour job just turned into a 20 minute one.

Sorry to make you repeat yourself lol.

 

No prob. Glad you got it working!