Magnet & reed switch boot opening

[NigelGRF]

I've read about the Modwise kit to open the boot using a magnet & reed switch, and I'd like to implement a similar system myself on my Griffith.
I understand it uses a microswitch on the door unlock mechanism, so that power is only fed to the reed switch when the car is unlocked. Has anyone got the fitting instructions, or a photo of the mounting of the microswitch? and a circuit diagram?
Any info would help a lot

Thanks

[phillpot]

Did something similar on my S Series. I used a permanent live, that way I can walk up to the car and open the boot without putting ignition on, my car doesn't have central locking.

[Polly Grigora]

5 terminal door lock actuators if fitted have common, open and close contacts built in

[David Beer]

[quote=NigelGRF]I've read about the Modwise kit to open the boot using a magnet & reed switch, and I'd like to implement a similar system myself on my Griffith.
I understand it uses a microswitch on the door unlock mechanism, so that power is only fed to the reed switch when the car is unlocked. Has anyone got the fitting instructions, or a photo of the mounting of the microswitch? and a circuit diagram?
Any info would help a lot

Thanks
[/quote

You will need a long arm micro switch, obviously the reed switch , magnet and a relay.
You could just buy the complete kit from tvrssw.
If you do have the 5 wire actuator, it doesn’t matter.

[David Beer]

David Beer]igelGRF said:

I've read about the Modwise kit to open the boot using a magnet & reed switch, and I'd like to implement a similar system myself on my Griffith.
I understand it uses a microswitch on the door unlock mechanism, so that power is only fed to the reed switch when the car is unlocked. Has anyone got the fitting instructions, or a photo of the mounting of the microswitch? and a circuit diagram?
Any info would help a lot

Thanks
[/quote

You will need a long arm micro switch, obviously the reed switch , magnet and a relay.
You could just buy the complete kit from tvrssw.
If you do have the 5 wire actuator, it doesn’t matter.

Did you speak with https://www.tvrssw.com/ ?
If you want diy info, drop me a line. I bet you don’t. !!

[cp81]

Dave would you mind sending me parts details and wiring diagram?

[David Beer]

Will send Tuesday .

[Polly Grigora]

A boot actuator can be operated by a remote control for as little as £6.93 + delivery + cable and connectors which are very cheap
Click Me To Reveal All

[David Beer]

Polly Grigora said:

A boot actuator can be operated by a remote control for as little as £6.93 + delivery + cable and connectors which are very cheap
Click Me To Reveal All

That’s lovely ! A magnet slipped into the tvr key fob is not visible !
Each to their own I guess.

[miniman]

I did it last weekend using the wiring diagram in this thread:

https://www.pistonheads.com/gassing/topic.asp?h=0&...

I took permanent live from the purple wire for the courtesy light which you can get at just behind the passenger seat. That powers both positives shown in the diagram.

I used this reed switch, hidden behind the number plate. Note you need a normally closed switch (which seems counter intuitive to me, but anyway this switch has both).

https://www.amazon.co.uk/gp/aw/d/B09TP5BSXN?psc=1&...

Generic relay from eBay / Amazon / motor factor.

Obviously the boot will open when the car is locked, but I figure someone would need to know where the reed switch was AND have a handy magnet to get any benefit from it!

[Polly Grigora]

miniman said:

I did it last weekend using the wiring diagram in this thread:

https://www.pistonheads.com/gassing/topic.asp?h=0&...

Note you need a normally closed switch (which seems counter intuitive to me, but anyway this switch has both).

Oh no, am very confused now

Surely the correct reed switch is of the normally open type like the one shown in the below diagram

If one was to use a normally closed type reed switch the boot would be normally open when the vehicle is in motion and the driver would have to lean out of the window, reach out to the rear of the vehicle and hold a magnet against the area where the reed switch is fitted to keep the boot closed

Regarding my above opinion and taking into consideration the position of the reed switch in your car which apparently is behind the number plate............

Should you ever be followed by the police and they notice that whilst driving you are also covering the rear number plate with your hand and lower arm preventing them from carrying out a vehicle ID check.......Yes you've guessed it correctly.......Big Trouble With The Law Incoming

[David Beer]

Okay about the reed switch being normally open, but really the police and illegal to have a reed switch behind the numberplate.

[miniman]

Yes I initially ordered normally open switch. The description of the switch I ended up with is:

NC means normally closed: when the magnet is together, the circuit is conductive (light on); If the magnet separates, the circuit is non-conductive (lights off)

Which seems somewhat counter intuitive but I tested with continuity tester before fitting and as described bringing the magnet into proximity connects the circuit.

[phillpot]

I guess in it's normal application, window or door closed the magnets would be together making a circuit, NC.

Open the window and switch opens, breaking circuit and triggering burglar alarm?

[miniman]

Yes I suppose if you classify “normal” as “with the magnet in place”.

Anyway, it works, just waiting for some tiny super magnets to hide in my Lego minifig keyring!

[Polly Grigora]

The type as in NO/NC of any contacts in any switch or relay is dependent upon which contact is made to the common contact when they're not activated

Good hey

[David Beer]

cp81 said:

Dave would you mind sending me parts details and wiring diagram?

Drop me a mail and I forward all the info .

[Pupp]

I must have posted up the logic and components I used at the time but somehow managed to rig up a boot release circuit that (usually) would work by holding the driver’s side door release button in. Worked regardless of locked/unlocked and the activation time varied according to ambient temperature… didn’t work if very cold or car battery was low. I recall I used a big capacitor to induce the ‘delay’.

Had quite forgotten that, be interesting to see if it still usually works when I recommission the car (having a body off currently)

[FarmyardPants]

Polly Grigora said:

A boot actuator can be operated by a remote control for as little as £6.93 + delivery + cable and connectors which are very cheap
Click Me To Reveal All

I installed a 4 channel one for doors and boot (and 1 spare) but the problem with these is that they are prone to being triggered by other RF transmitters nearby. I would often find the doors and boot open for no apparent reason (I keep the car unlocked in the garage).

I had toyed with the idea of using the 4th channel for the ignition button for remote start, but after the above experience thought better of it .

[David Beer]

FarmyardPants said:

I installed a 4 channel one for doors and boot (and 1 spare) but the problem with these is that they are prone to being triggered by other RF transmitters nearby. I would often find the doors and boot open for no apparent reason (I keep the car unlocked in the garage).

I had toyed with the idea of using the 4th channel for the ignition button for remote start, but after the above experience thought better of it .

That’s why better for a magnet and reed switch. If worried about legal stuff, I had mine in the rear light. However the legal stuff is complete rubbish, how many hatchbacks with their tailgate up have no number plate.
All parts are available from farnell.