Alarm Activation Switch

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Page created by T Jan 4th 2011:

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Original Alarm Activation Switch. Illuminated, Push Button, Momentary Activation.  Click to Enlargen. Photo by T.

Alarm Activation Switch:

Early Car Alarms were activated by an Illuminated, Momentary Contact, Push Button Switch.

Activation:

Activating the Alarm was done by pushing the Switch when the Ignition was off.The Light then remained steadily illuminated for 30 seconds, allowing time to close the Doors and leave the Car. After 30 Seconds the Light flashed every second showing the Alarm was activated.

Triggering:

The Alarm was triggered when any of the sensor Switches were operated. Sensor Switches were mounted in the Doors, Bonnet and Boot for a Sedan or the Tailgate on a Wagon. Typically the Horn would sound and the Hazard Lights flash until the Ignition was turned on. 
Original Alarm Activation Switch. Note the Plastic Nut that holds the Switch in place. Click to Enlargen. Photo by T.

Deactivation:

Deactivation of the Alarm occurred when the Ignition Switch was turned to the on position. Note it wasn't necessary to start the Car, only to turn on the Ignition Lights by turning the Key to the on position. After unlocking the Car, the Driver was allowed 10 seconds to deactivate the Alarm by turning on the Ignition before the Alarm sounded.

The yellow Bezel could be removed by pressing in the tangs with a Paper Clip. After the cover was removed, the Light Bulb could be replaced. The replacement Switch uses an LED which draws much less current for the same light output. Click to Enlargen. Photo by T.

Switch:

The Switch used was an Illuminated Momentary Push Button Switch like Jaycar Cat No SP0750.All that description means is that the Switch had a light in it (illuminated), could not be held in any position (Momentary) and was activated by pushing (Push Button).

The Switch Has 6 Contacts:

1 - 2 Normally Closed: The Alarm trigger Wires are connected here. If the Circuit is broken and the Ignition is off, the Alarm is activated. 3 - 4 Normally Open:   Not used.a - b Light Bulb:          In the case of an LED, these were marked + and - since the LED only works if wired +ve to + and -ve to -.   
 
Labellings on the Original Switch. Click to Enlargen. Photo by T.
 
Labellings on the Original Switch. Click to Enlargen. Photo by T.
 
Replacement Alarm Activation Switch, Jaycar Cat No SP0750. Manufactured by TEND Taiwan. Model T16Bl-9 12V. The replacement Bulb is Jaycar SL2635. Click to Enlargen. Photo by T.
 
The replacement Switch Connections. The red Bezel removes the same way as the yellow Bezel. Click to Enlargen. Photo by T.
 
The replacement Switch Connections. Note the Castellation around the Contact Area. The Nut has to slide over this section. Click to Enlargen. Photo by T.
 
The Nut on the new Switch slides over the Castellation until it reaches the threaded part. That can be a trap if you're trying to fit the Nut blind behind the Dash and can't make out why it won't rotate. Click to Enlargen. Photo by T.
 
Better Switch. Cheaper, LED rather than Incandescent so less likely to Blow in Cold Weather, Shorter Body. Jaycar SP0741. Has positive Locator.  Photo by T. Click to Enlargen.
 
Better Switch. Cheaper, LED rather than Incandescent so less likely to Blow in Cold Weather, Shorter Body. Jaycar SP0741. Has positive Locator. Photo by T. Click to Enlargen.
 
Wiring for Alarm Activation Switch Jaycar SP0741. Image by T. Click to Enlargen.

     

Links:

Jaycar Replacement Switch Maker (TEND Taiwan)

Terms:

Terms

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