508D wiring

I recently purchased a Jeep Wrangler that has a Hornet 740T alarm installed. The previous owner had purchased a 508D and had it installed but said he had nothing but problems with it so he had it removed and of course has no installation or owners manual. I would like to try to reinstall it but have no idea what wires go where. I have the original harness from the 508D but it is 4 prong (Blue, Green, Red, Black) and the Hornet only has a place to plug in a 3 prong harness. Also is there anywhere I can get these manuals because I knwo DEI will not let me download them.

That 3 pin port is for door lock.

Do a search and you will see this question come up alot and the answers.

The reason the previous owner had problem was because there was no external shock sensor so that there could be warn away and full trigger.

But if you want to install it without warn away, wire it like this

red- 12v
black- ground
blue- blue wire of the alarm, on the 12pin main harness (instant trigger)

Seeing how there isnt a warn away, i say there is no point for the 508d. The shock sensor, or door trigger would do fine for intrusion.

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Note: You Always Dont Get What You Pay For.

You cannot add another shock sensor, i am saying that since your alrm has built in sensor. It is not like most with external sensor. If you did (which u dont and cannot without getting a new brain), you would be able to make your connects along the line of the external sensor.

Just wire it up like above (you do not have warn away), so when som1 enters the interior of the jeep, it will set it off. Shrink the size of the dome to your interior Only. So that when some1 is standing next to it, it wont go off.



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Note: You Always Dont Get What You Pay For.

the 740T is just one of the model that doesnt have extra port. The previous person should have gotten a higher model.

There are others that has built in shock sensor and a port meant for the 508D.
727T has built in shock sensor and extra port.


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Note: You Always Dont Get What You Pay For.

2 Multiplexed BLUE wire of plug-in shock sensor. Inputs shorter than 0.8 seconds will trigger a Warning Zone response, while inputs longer than 0.8 seconds will instantly trigger the full alarm sequence.

4 Multiplexed Input GREEN wire of plug-in shock sensor. Inputs shorter than 0.8 seconds will trigger a Warning
Zone response, while inputs longer than 0.8 seconds will instantly trigger the full alarm sequence.

You mean the multiplex input, not output.
https://www.the12volt.com/downloads/file.asp?ID=511

Look at the last page of the file. You do not have a multiplex input, that is only avaible on the plug-in shock sensor, which you do not have.

Was wrong about how to wire it up, should be
red - 12v
black- orange Ground when armed
blue- blue wire, instant trigger

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Note: You Always Dont Get What You Pay For.

Actually the correct way to wire it would be:
Red- constant power
Black- ground or ground when armed
BLUE AND GREEN- Blue multiplex input.

Also if you look at Page 5:
H1/6 BLUE (-) multiplex trigger input, zone 1
This wire will respond to a negative input with an instant trigger. Inputs shorter than 0.8 seconds will trigger the Warn Away response, while triggers longer than 0.8 seconds will instantly trigger the full alarm cycle. This wire is ideal for hood and trunk pins and will report on Zone 1. This wire can also be used with Directed Electronics 506T Glass Breakage Sensor, as well as other Directed Electronics single stage sensors.
The H1/6 BLUE multiplex trigger wire can be used to shunt sensors during operation, using the auxiliary channels. When any of the auxiliary channels are transmitted, the H1/6 BLUE wire monitors for a ground. If ground H1/6 BLUE (-) multiplex trigger input, zone 1
H1/5 GREEN (-) door trigger input, zone 3
H1/4 BLACK/ WHITE (-) interior light illumination output
6 © 2004 Directed Electronics, Inc. Vista, CA
is detected within 5 seconds of transmission, the sensors and the multiplex trigger input on the BLUE wire will be shunted until 5 seconds after the ground is removed. This allows the customer to access the trunk, remote start the vehicle, or roll the windows down without first disarming the alarm. (See Bypassing Sensor Inputs section of this guide.)

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Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Wow im a noob.
Never knew blue wire monitors like that. Ive always been using it for trunk.
But wire it like Auex says and it will be right 100%.

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Note: You Always Dont Get What You Pay For.

Cool, just make sure you turn it down if you have the plastic windows because it will false when there is some wind.

captainzab, most dei alarms have the multiplex input now. It has been that way since around 99 when I attended a technical training seminar. Always learning something new is the only way to stay on top.

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Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Thanks again for the help that seems to work. Well somewhat.......I just have to mess around with the sensitivity, having a little trouble getting it correct but I expected that. I mounted the 508D in the center console and it doesn't seem to want to cover the back of my Jeep real well, maybe I expected too much or maybe I just don't have the settings correct yet. I'll keep trying !!!!!

Did I misunderstand or should the 508D work if I mount it in the center console which is wood. It just isn't consistent on picking up and sometimes it won't even trigger the alarm even when I wave my hand directly over the console. I have tried the settings from one extreme to the other.

Many suggested headliner is the ideal or perhaps the correct location for mounting 508D.

If you want the range to cover all around your vehicle without setting it to most sensitive, hook up another 508D is not crazy. This way you get 2 outter circles, one near the front and another near the rear, and of course, there is a little overlapped range but it doesn't matter.

Like auex mentioned, 508D will false when wind blows. It will also false when birds fly by or if you park your car under a tree and a leaf falls. That's why I hooked my warn away wire through a switch so I can toggle it and disable warn away if necessary.