MOT time and its booked in for 3pm tomorrow.

 

Done all the usual MOT checks but one thing (its always one) has presented itself as a wonder !

 

After the zed being off the road for nearly three months all was well untill about an hour ago where

i notice the door illumination on the dash won't go out and when i checked that all doors are shut

it stays firmly lit.

 

Would that wee bulb cause my zed to fail its mot ?

 

A few things i've done to test the door circuits is to close and alarm the car then manually open the

door to see if the alarm will trigger which it does for the two doors but not for the boot so i check

the boot circuit and when disconected and reconnected you can clearly hear the door relay which is

behind the passengers side.

 

So what is failing and why ?

 

What is covered by the open door alert on the dash; is it just the doors and boot or is the bonnet

part of the circuit.

 

Any suggestions would be appreciated.

 

Cheers

 

Lee

Great news, cheers bud !

 

now apart from pulling the bulb how do i go about testing all the door connectors and how many are apart of the circuit ?

 

its not an mot fail mate

The alarm is probably the problem, most alarms will use a single cable connected to the door pins to trigger the alarm, the boot will not set the alarm off as there is a diode in the circuit to isolate the door and boot contacts from each other. The open door trigger is working as you said so the alarm is sensing a change on ethe circuit, however we have seen this when a few times when the alarm input trigger circuit has gone resistance and so the door open light glows.

 

Try and find where the trigger cable is connected to the door pins, as most times alarm engineers favour the drivers side for everything, remove the sill cover and pull the carpet back, undo the door pin and gently pull on the cable this will show which one it is and bet you will find a non Nissan cable connected to it, this will be the alarm cable disconnect this and retest.

 

Jeff TT