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Old 10-26-2010, 04:40 AM   #1
PaulBennett
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Default Remote Keyless Access - I will have to engineer my own - need help

2003 Century Fleet car w/o receiver module (confirmed by dealer. I could do a cheap dirty where fob opens/closes locks via battery powered receiver. Crude. Anyone have diagram of where the (ROI?) module plugs into the car and where. Parts man refused me the part number of the GM aftermarket module to bring the body up to speed with factory installed modules. Quoted $350 for the part and $60 labor and says the 2003 modules are unofficially out of stock but floating around the parts system, hence available.

Cheapest and easiest alternative is the $10 device, stick it behind the driver'* door lock handle, wire to the lock/unlock switch and power with 3 or 4 of "C" cells needing replacing every 6 months.

I would like to use car battery power and tie into door and trunk lock/unlock, horn and lights. This requires information I'm asking you for...about the connector the factory module plugs into, where it it and the wire color/functions.

Anyone have these wiring diagrams? And can relay the info? Please
contact is PM or [email protected] - THANKS
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Old 10-26-2010, 06:28 AM   #2
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Paul... need a little more info here.

Do you have factory power locks and are you against having an aftermarket system added? The Regal has the RFA module behind the cluster. I think they probably prewired most of the cars and that you'd be able to get one from another car like you mentiion. I'm not 100% that the connector etc would be there.
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Old 10-26-2010, 07:55 PM   #3
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Paul... need a little more info here.
Do you have factory power locks and are you against having an aftermarket system added? The Regal has the RFA module behind the cluster. I think they probably prewired most of the cars and that you'd be able to get one from another car like you mentiion. I'm not 100% that the connector etc would be there.
What is RFA? What cluster?
I have factory power locks and am probably going to engineer an aftermarket system. According to the Buick dealer parts dept, all cars have the connector but fleet cars didn't get the module. He wants $400-500 to install the factory add-on kit. They are out of production for the 2003 Century but he claims the ability to find one within the US dealer network.

I have no pull-parts junk yard nearby to explore. I have explored the lock/unlock switch at the drivers door and can add an aftermarket there but don't know about getting +12v in the door. One Rec-11 claims 5Ma idle current so a pack of "C" cells wouldn't last 6 months. I'd like to find diagrams to know where the factory module is normally installed and the wiring at the connector. Diagram for the door would also be helpful to locate +12v.
I do NOT want to get into the wiring under the dashboard/steering wheel area.
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Old 10-27-2010, 07:46 AM   #4
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If you toss the module number in this thread, it'* very possible the junkyard guys can find you one for $10-$20. The RFA is the remote function actuator, aka the little black box that connects in and makes it all happen.

This box plugs in on your car right behind the instrument cluster. It takes about 10 minutes to get to it. If the connector is there, I don't see why it would be a hardship to put a $10 box in and add a factory remote to have the factory look and ability.

I'd skip the C batteries personally and add an aftermarket version instead. For what it'* worth I recently installed a starter on my Regal and can hand you the lock/unlock wires on the Body Control Module that would be located under the dash by the drivers door.
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Old 11-02-2010, 11:25 PM   #5
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If you toss the module number in this thread, it'* very possible the junkyard guys can find you one for $10-$20. The RFA is the remote function actuator, aka the little black box that connects in and makes it all happen.
Thanks. I await receipt of a ebay DVD service manual to get the number. The local Buick dealer parts department guy looked up my VIN and said my car didn't have it and it was against somebodies policy to tell me the part number. He said I could pay them $350-$450 installed price, only then would he would check with other dealers for one.

Thanks for the location, I assume the connector is available after removing a panel above the pedal area. I still am hoping someone here knows that module number.

You already know and I just learned: Couldn't lock the car by standard methods like using the key in the (solitary) driver'* door lock or pressing "lock". One must press "Lock" and listen for the 3 beeps, then press it again and the doors will lock (click), then close driver'* door. Voila
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Old 11-03-2010, 07:57 AM   #6
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Bob...where are you located? If you are near anyone one of us...this is a project, I'd like to see us take on.

Do me another favor.. toss me your vin# in a pm. I know a dealership parts counter guy. He'* amazing at finding parts numbers and always willing to share them.
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Old 11-04-2010, 11:46 PM   #7
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If you toss the module number in this thread, it'* very possible the junkyard guys can find you one for $10-$20.
OK, my DVD FSM came and I know know how to get at the keyless module...it'* by removal of 5 bolts holding the cluster in place. I might add, although the software wrapped around this FSM is strange, it does have the proper wiring diagrams etc which I was after. Programming is different than elsewise told...it says to synchronize the transmitter/receiver just hold the Lock/Unlock both down for 7 seconds...Quite a bit different that the keyin/keyout/keyin/keyout etc routine.

The FSM referrs to it as RCDLR. Is that an adequate module number?



*FSM=factory service manual
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Old 11-05-2010, 09:06 AM   #8
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I think that'* the name of one of the modules.
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Old 12-22-2010, 02:03 AM   #9
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I'm new here and not well versed in Buick'*, so maybe I'm a bit naive on some of this, but...

Why not just install a basic keyless entry system? A decent Audiovox unit is $20 with 2 fobs. It'* 4 wires for basic functionality (+12v, ground, red/black for lock, orange/black for unlock, both in the drivers kick or at the BCM). 7 wires if you want horn, lights and trunk (horn is black at the steering column, lights are light blue at the headlight switch, trunk release is brown at the BCM).

It shouldn't take any more than an hour, maybe two if you've never pulled trim pieces off before.
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