I've got a '92 S10 blazer with shaved handles. I'm currently running them off the aux channels of my alarm, which has no safety device.(ie. accidently hit button while driving and doors open)
What I want to do is disable the power to the relays when the vehicle is in any gear except Park or neutral. Would the neutral safety switch allow me to do this? Whats the best way to do this? Run a relay off the neutral safety switch that switches the power to the actuator relays off and on depending on gear selection? thanks in advance.
I'm just wondering how you "accidentally" hit one of those tiny little buttons on the transmitter, hanging out of the ignition ....while driving down the road?
I see there are no door handles..... but how about locks? (ign. controlled)
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The crazy thing is....these trucks have a mechanical neutral safety switch on the column which impedes the crank signal when in gear. You can't use this for your set-up.
I suggest using the light green key sense wire which sends a ground when key is in barrel. Key must be out of barrel for doors to open or close.
Here's how. Send aux (open/close) channel through the normally closed contacts of a relay. Key in barrel activates coil thus impeding door opening.
If you want to get fancy: you can add the door trigger to the above idea so that if the door is open it will allow it to close but if it's closed and the key is in barrel then it doesn't open.
Another idea, if you have a spare aux channel then you can do it so that you need to press aux to latch a relay allowing the "open" command to pass through.
IMPORTANT Speaking from experience, add a mechanical means to open door in case of dead battery or inop system. Use a bicycle brake cable connected to the door mechanism and pass this out from the door out to some secret location.
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Prepare your future. It wasn't the lack of stones that killed the stone age.
thats not really what i wanted to hear about the mechanical safety switch, but the spare aux to latch a relay sounds like a good idea..
I've got one more question though. I've got a button on the dash that pops the rear glass open, and it only works when in P or N. The wires running to it are pretty small, could I power a relay off the wire running into the switch?(it only has two wires) Or maybe track down its 12v power source?
And as far as a mechanical backup, I've already got a hidden release cable on my rear hatch(which is also shaved). Worst case scenario I'll be climbing in through the back. I guess I'm not the only one using bicycle cable..
thanks for your knowledge
You know what? I forgot about that. Don't go to the switch but rather to the relay it controls. There's an ORANGE / Black at the rear hatch release relay (near the inside fuse box). This shows ground when in park.
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Prepare your future. It wasn't the lack of stones that killed the stone age.
hi,
you can use two relays (A + B), wire as follows:
term 86 of both relays to ignition, term 86 of relay A to key side of neutral safety switch (yes a mechanical one is fine) with a diode (1N4001 or equiv) in series, band towards the switch, term 86 of relay B to ground, term 30 of both relays to your aux out channel alrm etc., term 87 of relay A and term 87a of relay B to whatever you'd like to control.
relay A uses the neutral safety switch to switch a ground (through the resistance of the starter solenoid) closing the contacts of this relay...relay B's contacts are opened when the ignition is turned on.
hope this helps
mark
thanks for the help. i'll put it to good use.