want keyless entry? remember the hidden fuel pump switch?

[Crunkrich]

Well now you can have it, and now your hidden switch can be wireless!

I installed a keyless entry into my brother's accord using a remote relay off eBay and a Single Pole Single Throw relay I grabbed from the junk yard. I thought the wiring diagram of how I did it could be useful, so I made one to post on here.



Do not cut or disconnect the 'unlock' wire on the lock switch or you won't be able to use the switch anymore, just strip some insulation off them and connect the wires!

NOTE: Here's the catch, just remember to hit the 'OFF' button on the remote after the door is open, because if you don't, the switch will stay on. It won't hurt anything, but it would be like holding the lock switch up with your finger. This only applies to momentary switches, like door locks or auto windows.

- - - - - - - - - - - - - - - - - - - - - - - - -

Remember all the discussions about installing a hidden switch that cuts the fuel pump off for security? Instead of wiring terminals #30 and #87 to the lock switch as shown, cut the fuel pump wire and connect the ends to these terminals. Keep the remote hidden or on your keyring.

You can apply this to just about anything that operates on a wire lol, it doesn't matter if it's a ground wire (lock switch) or a +12v wire (fuel pump).

remote relay: http://cgi.ebay.com/12V-DC-REM...1eb47

How relays work: http://www.explainthatstuff.com/howrelayswork.html http://www.youtube.com/watch?v=wz4X5umfNkQ

Modified by Crunkrich at 9:30 PM 3/9/2010


Modified by Crunkrich at 9:59 PM 3/9/2010

[RCA]

Wow, that sounds awesome!

I don't know the first thing about wiring and relays but a wireless fuel cutoff sounds SICK!

[Razi]

This is pretty awesome!Put this thread into my favorites.

[MinisterofDOOM]

The only downside I see to this is if your remote dies or you don't have it on you and you have to manually unlock the car (heaven forbid!) you're screwed.

[Crunkrich]

The only downside I see to this is if your remote dies or you don't have it on you and you have to manually unlock the car (heaven forbid!) you're screwed.

the key still unlocks the door, it doesnt actually change anything

[Crunkrich]

Wow, that sounds awesome!

I don't know the first thing about wiring and relays but a wireless fuel cutoff sounds SICK!

Actually, for positive 12v wires, you can bypass the relay and just use the remote. If its just one +12v wire you want to make wireless, just cut the wire and hook one side to the +in and the other to the +out on the remote receiver.

The reason the relay must be used on ground wire systems is that there is no incoming voltage to actually power the wireless receiver. Using a relay allows the receiver to be connected to a +12v source, then route that power to the relay which does the actual on/off on the desired wire.

[szh]

Is the switch a latching relay or does the receiver do the "latching" functions? I.e., does that "switch/relay" inside the receiver stay closed once the "ON" button is physically released on the remote?

If the receiver is a momentary contact method only - like I would expect for a door unlock-lock function, then yes, it could engage the fuel pump circuit, but then, once you let go, the relay would open and fuel pump circuit would be disabled ...

Am I misinterpreting?

Z

[szh]

Is the switch a latching relay or does the receiver do the "latching" functions? I.e., does that "switch/relay" inside the receiver stay closed once the "ON" button is physically released on the remote?

If the receiver is a momentary contact method only - like I would expect for a door unlock-lock function, then yes, it could engage the fuel pump circuit, but then, once you let go, the relay would open and fuel pump circuit would be disabled ...

Am I misinterpreting?

Ah, never mind ... I reread the original post. Looks like the switch inside the receiver stays latched - if you use this for a door unlock function, you have to remember to use the OFF button each time.

Z

[Crunkrich]

That's right, I made the part bold where I mentioned it cause it is important.

[breadbox]

SICK! I might do this if I ever feel like I wanna be baller and unlock my car from far away.

[Crunkrich]

I got kinda bored in between classes today, so....