magnetic door key

[MARTYCAB]

hi there can any one help me i have just got hold of a 87 cab which will not start can any one tell me what the magnetic key does which is under the main key lock on the door and can it be disarmed .i have no power getting to the fuel pump under the car and was wondering if this had anything to do with it .the fuel pump does work when power is attached to it from the battery so can anyone tell me what the key affects on the starting system thanks

[orangecurry]

if you put the magnetic key in, and the system is 'on', there should be an LED lit just EDIT* ABOVE * the keyhole, and also one on the rear of the car just under the number plate (might be difficult to see in daylight).

It might be worth putting the key in to see the LED 'on', then putting it in again to see the LED go 'off'.

[orangecurry]

if you have a manual, it details this key on page 38 - it doesn't mention the fuel pump, but it does say '...and the ignition circuit is interrupted.'

it might well NOT affect the fuel pump?