Thread: Discovery 1 central door lock fuse

Hi Grahame.
Sounds like that will be fun to find.


You could try connecting a multimeter measuring ohms (resistance) stuck into the fuse "out" (not the 12 v side) and earth the other lead to will tell you the resistance from the circuit to earth.
I am not sure what the resistance should be in the circuit, but if it is reading zero this MAY indicate a short and you might be lucky enough to get a varying reading by opening/wiggling doors that may lead you to a door to isolate/pull apart first.
There are lots of mays and mights in there, but you could be lucky.


I would also try locking/unlocking each door manually and see if the reading changes.


You could also try and follow the wire path and look for obvious damage, particularly where it runs to the back door, (I don't know where it does though), or where it moves such as the door hinges. Maybe even up behind the pedals, etc.


Good luck with it.
Jeff

Hi Jeff,

Many thanks for your response. I'll try your suggestions. It is a vexing problem as the fault could be anywhere in the vehicle. Anyway, only one way to find out.

Grahame

Hi Grahame,

As Jeff says it could be hours of fun. I'm probably not going to be too much help but if it was me I'd start to eliminate possible components. Has anyone done anything to a door? Has a door been damaged recently? Has anyone installed any accessories? Could they have pinched a cable or loosened a connection?

Assuming that nothing has happened to the doors or nothing has been installed then I'd start by checking the connections to the receiver where ever that may be. Then I'd start isolating each actuator to rule them out. If it still happens then the actuators are fine and then it may be a wiring problem. Check all the plugs for loose/damaged fittings/connections. The wiring in my rear door is tied to a pressed metal bar but I noticed that it had some sharp edges. Could the wiring rubbed on similar pressed metal bar in the others doors?

Not much help but perhaps a few suggestions for you to consider.

Hi Mike,

Thanks for your advice. I'll give it a try.

Regards,
Grahame

Hi again Grahame.
I have managed to extract a D1 Electrical manual which may be of help to you.
It shows all of the connectors, cable routes, where everything is etc.
It is pretty comprehensive, so a bit big so I would suggest you right click on it and "Save target as"
http://58.162.208.190/lrd1/d1electrical.pdf
It's about 25 MB.
Hope it helps.
Jeff