Bertram Hill
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TVR  Griffith   
This  information has been gathered from personal experience and is  believed to be  accurate but there is no guarantee that this is the case. Anyone  using this  information does so on the understanding that its use is completely  at their own  risk and that no liability for errors or omissions or consequential damage to  persons or possessions will be accepted by the author  or his agents. Prospective  users should make their own considered judgement or  seek specialist advice as to  the accuracy or otherwise of any statements made  before using this information  in anyway. 
  
  

Boot Lid Motor Failure
The boot lid is  released  from a momentary action dash panel push button. Unfortunately this  push button  frequently sticks behind the dash causing the actuating motor to  run  continuously. As the motor is only light duty it burns out very   quickly.   The solution was to  knock  up a simple pulsed time delay unit that produces a single 1/2 second  pulse when  the button is pressed. After the single pulse, the supply is cut off   so even if  the button sticks all day no harm will result.    The unit is placed   between the existing boot connectors for the boot motor. Action: When the boot   open button on the dash is pressed, +12 volts is fed to the circuit. The   normally closed relay contacts A1 then route the +12 volts to the motor and the   boot opens. After about 1/2 second the 47 micro-farad capacitor charges up   sufficiently to cause the transistor TR1 to conduct, this operates the relay   causing contacts A1 to open and the boot motor to stop running. Even if the  push  button sticks in the relay contacts remain open so no further current can  reach  the motor. There is a small current drain through the relay coil but this  is  only milliamps so of no consequence. I used a 2N3053 transistor but any NPN   transistor of a similar rating would be OK. The device has been in place now  for  several years and to date no more burnt-out motors.

Supplier for components:
Maplin
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