M80
Senior Member
- Joined
- Jan 21, 2006
- Messages
- 5,931
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- Location
- Derbyshire
- Your Mercedes
- 2014 639 Viano- 651, 5sp Auto. 2009 S211- 646, 5sp Auto.
I fitted a garage door remote into the Gr Cherokee, intending to do the same for the Viano a little later.
The remotes are the 12v learning type. Set up to operate the door the remote button is linked out and the battery terminals have soldered fly leads from them, the idea being that when 12v is applied to the remote it opens / closes the door. It works as desired.
A while ago I ordered some countdown timer relays from China. They weren't as described in that they could be triggered to initiate the pre set countdown via a momentary switch, but the same switch wouldn't terminate the countdown. I'm waiting for the supplier to send the desired timers.
It struck me that these timers could be used for the remote purpose.
On applying 12v to the timer relay it would initiate the pre set countdown, the ign' aux 12v could be used for this.
Applying 12v to a trigger pin would do the same, the cars reverse 12v could be used for this.
The common of the outgoing relay is linked to the aux input.
The n/o of the relay feeds the garage remote.
Mounting the angel eye momentary switch in a convenient place, and the timer countdown set at 4 minutes and now,
the key in the ignition and the LED of the momentary switch is illuminated at a lesser brightness to indicate availability (till the 4 minutes times out the relay). Press the switch to full brightness to indicate the remote activation.
As we both reverse onto the drive on returning home selecting reverse will trigger the countdown again half illuminating the momentary switch. There is then 4 minutes again to activate the remote, before the key is removed.
All dandy, no more digging out the remote to open the door, and security is no longer compromised if someone broke into the car and nicked the remote.
Installed tonight the door closes as designed.
The issue is that the door doesn't open. It seems to me that the car is acting as an RF blocker and reduces the remotes signal strength, strong enough to reach inside with the door open but the garage door blocks some signal.
Thinking of moving the remote's antenna to have a clearer view of the garage I opened up a remote but can't see anything resembling an antenna.
Has anyone any thoughts of how to improve the signal seen by the receiver in the garage?
The remotes are the 12v learning type. Set up to operate the door the remote button is linked out and the battery terminals have soldered fly leads from them, the idea being that when 12v is applied to the remote it opens / closes the door. It works as desired.
A while ago I ordered some countdown timer relays from China. They weren't as described in that they could be triggered to initiate the pre set countdown via a momentary switch, but the same switch wouldn't terminate the countdown. I'm waiting for the supplier to send the desired timers.
It struck me that these timers could be used for the remote purpose.
On applying 12v to the timer relay it would initiate the pre set countdown, the ign' aux 12v could be used for this.
Applying 12v to a trigger pin would do the same, the cars reverse 12v could be used for this.
The common of the outgoing relay is linked to the aux input.
The n/o of the relay feeds the garage remote.
Mounting the angel eye momentary switch in a convenient place, and the timer countdown set at 4 minutes and now,
the key in the ignition and the LED of the momentary switch is illuminated at a lesser brightness to indicate availability (till the 4 minutes times out the relay). Press the switch to full brightness to indicate the remote activation.
As we both reverse onto the drive on returning home selecting reverse will trigger the countdown again half illuminating the momentary switch. There is then 4 minutes again to activate the remote, before the key is removed.
All dandy, no more digging out the remote to open the door, and security is no longer compromised if someone broke into the car and nicked the remote.
Installed tonight the door closes as designed.
The issue is that the door doesn't open. It seems to me that the car is acting as an RF blocker and reduces the remotes signal strength, strong enough to reach inside with the door open but the garage door blocks some signal.
Thinking of moving the remote's antenna to have a clearer view of the garage I opened up a remote but can't see anything resembling an antenna.
Has anyone any thoughts of how to improve the signal seen by the receiver in the garage?