2006 dodge caravan rke

I have a 2006 Dodge Caravan with OEM power locks but no power sliding door or hatch. Also no Sentry Key. I have a DE 712t kit that has been here forever I need to install but have ran into a problem on the door lock wiring which is a mux system. Is there an optional interface to go with this kit or a way I can make up something on site to get this working?

Thanks for any advice and help!

Regards,
Wayne Thomas

If the 712 has 2 lock wires you will need relays to drive the resistors.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

I quote:-"Lock is negative trigger thru a 5.3K ohm resistor. Unlock is negative trigger thru a 2.0K ohm resistor. MUST use relays. The BCM (Body Control Module) is in the driver kick panel near the parking brake. It has 5 plugs in it, one 6 pin plug and four 34 pin plugs. Can also use Directed interface modules".

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Thanks for the information ! The resistance values helps consideraby.. now I won't have to measure the switches :)

Wayne

One other question I forgot to ask but I think I am correct in my calculations ..Are the resistors supposed to apply the 5.3K resistance between the vehicles lock/unlock ckt to the BCM and chassis ground?
And wired to completely isolate that resistance at all times unless the fob lock function is depressed?

Yes, I think.

For Lock, the 712T's Lock output pulse will trigger a relay. The relay will connect a chassis ground thru a
5.3K ohm resistor to the vehicles Lock/Unlock wire.

For Lock, the 712T's Unlock output pulse will trigger a relay. The relay will connect a chassis ground thru a
2K ohm resistor to the vehicles Lock/Unlock wire.

Here is a diagram from Bulldog Security :
https://diagrams.marktoonen.nl/DOWNLOADS/17044_CARAVAN_CHRYSLER%20MINI%20VAN%2001%20-%20UP%201%20WIRE%20JBS%20UNITS.pdf
The top diagram would be the one to use. ( Please note the diagram has Pin 85 and 86 labels switched and did
not use a quenching diode across the relays' coil.)

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Soldering is fun!

Here are two ways to do it, they are both effectively the same, resistor values and colours vary for different vehicles:-
FEF_multiplex_via_relays.bmp
27B_resistive_locks.bmp
Sorry, didn't understand your last question, if I did the answer is that the relays effectively isolate the RKE wires from the BCM.
Kregg, not talking to me?
I emailed you last weekend and you didn't get back to me unless you were busy.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Thanks for all the great info ! I "think" that the 712 has internal door lock relays because I can hear relays operating internally when the fob is pressed so I might be able to do a direct wire without an isolation relay arrangement. The information for the 712 says relays required but if the ckt is a true open when at rest it shouldn't load the vehicles lock/unlock ckt.

Thanks again for all the information! Jogged my memory for sure!

Wayne

I did say two wires earlier and you never picked up on this.
With two wires your lock unlocks will be green and blue.
With internal relays the following 6:-
Violet
Violet/black
GREEN/ black
WHITE/ black
Blue/black
and BROWN / black.
Your instructions should show you this.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Wiring will then be violet and violet black to a good ground, e.g. bolt to kick panel, remove bolt use a ring terminal and scrape to bare metal under the bolt.
WHITE/ black and BROWN / black don't use and insulate.
GREEN/ black via resistor LOCK.
Blue/black via resistor UNLOCK.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Thanks Howie,
Sorry I didn't indicate this before..but the way you have explained it is the way it's going to be wired. With the internal relays I don't see a need for an additional relay to isolate the resistor from the receiver.

Hopefully I will get this installed tomorrow weather permitting and I will get back to here and let you know what happens.

I appreciate the help! I just wanted to make sure my assumptions were in agreement with some one who had installed on the mux setup before.

Wayne

I,m happy to report that the system is installed and working fine!
I had a little trouble with the rear hatch. The information in the application information from Directed was incorrect in my case. They specified the trunk release was to be triggered on the lift gate switch mux which makes sense..but in my situation it would not work at all on that circuit.(C2 Cavity 6) I tried all the listed resistances plus the 2.7K that the factory service manual shows with no change.

I did get it to work properly though just on a different circuit the lift gate handle switch sense ckt which is also at bcm connector 2 but in cavity 22. Service manual does not give an actual resistance for that switch but schematic symbol indicates there is one. I used 1.7K ohm resistor to the channel 2 output and it worked fine. All original switches worked fine after installation also so there is no additional loading problems.

Thanks to Howie and everyone who helped and answered my questions. Hopefully I can repay this in the future. I did several on GM vehicles while working as a GM master tech but I have since retired and all that's behind me.. almost :)

Don't worry radiotech, you aren't the only retiree here, how do you think I get time to answer multiple questions from across the pond?*
Glad you succeeded though.
* The UK. Where the Chevys are made in Korea.
And the "UK" Fords are made in Spain, Germany and Turkey.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

I can sure say it takes me a lot longer now to do an install like this :) Too many things working against me LOL!



Wayne

Tell me about the time factor when every time you stand up your knees are screaming at you.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.