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I had a keyless entry and push button wired and working in car but the keyless entry/locking was effectively only mimicking using sill buttons to lock car so I was wondering could it be connected so BECM thinks it's original system and alarm works as well?

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You like living dangerously don't you? It could be done but how are you doing it at the moment? Are you using an extra actuator to physically move the sill button or are you applying a pulse to electrically simulate the sill button being pushed down?

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I took it out but I wired it to the lock unlock cables in door then to couple relays then to gob sytem but the lock unlock from BECM was cut do it didn't feed back to outstation but as it only activated lock for sill locking it didn't activate alarm and I woul have liked alarm working

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Rewire it back to standard then use your relays on both the CDL and keyswitch wires to simulate the key being turned and the CDL switch being operated. It needs to supply a signal to the outstation from the latch, a momentary connection between the Blue/Red and Black wires will make it think the key has been turned in the lock and at the same time you need to put a continuous connection between Green/Red and Black to hold it unlocked and open circuit to hold it locked.

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It's currently back to standard bud but are you meaning cables to outstation

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Yes, you need to simulate the key being turned in the door lock to lock and unlock, so any additional connections need to be done at the latch end. What's wrong with using the fob that Land Rover supplied you with though?

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Nothing but keyless entry uses there own fob but while I new how to connect it for sill locking there was no alarm, but thinking of it now itlf it's wired so alarm works then if you press brakes 15 seconds after car starts it locks doors so a bad idea then lol also thinking about it if while using sill lock and no alarm was OK with push starter if it thinks key was used to unlock car but car started from buttom I'm assuming eventually it will upset the BECM

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Without knowing what system you are trying to fit, can't help much. By keyless entry do you mean remote fob (like Land Rover fitted in the first place) or one of these systems like they started to fit to new cars (and are now stopping again because it's too easy to use a code grabber to steal a car) where it automatically unlocks when you walk up to it? Haven't a clue what the brakes have to do with it.....

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Yeah it unlocks when you walk upto it and have to press brakes to start car and it auto locks after 15seconds of driving then unlocks when engine stopped

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So the same as most newer cars then? It's standard on most, if not all, Mercs (although can be turned off), BMW, Bentley, Audi and probably a lot more (they are just the ones I've driven recently). It's mandatory in the US so I suspect it's there on all cars that are sold in the US. The problem with it is?

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The problem m with it is?

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I can see that not setting the alarm is a problem but the self locking is normal on most modern cars. You've modernised the locking so you've got to live with it.

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I've just put it back to standard but I think the self locking can be switched off in aftermarket unit