10 amp fuse

[(RIP) rustygates]

Hi all,
Just noticed this morning, no central locking and no radio and no clock and and the doors open light is on continually, after going through the fuses there was a 10amp fuse blown (top row ) changed fuse but it blew again so there must be a dead short somewhere, can anyone give me a pointer as to where i go next, before i start doing the "process of elimination" which could take days. thanks

rustygates.

 

[ronypony]

What did the blown fuse protect ?....this may give a clue as to where the problem lies.

I once had a similar problem with another 4x4 vehicle. However the problems were with the rear lights/rear wiper/heated screen etc etc....it turned out to be damage to the wiring loom as it passed under vehicle on its way to the back. Check as much of the harness as you can see/get to for damage.

The common factor for the interior light and central locking mechanism is the TCU...timer control unit...might be worth checking that...since it dont seem to be turning off the interior light and central locking is not working.

 

[(RIP) rustygates]

What did the blown fuse protect ?....this may give a clue as to where the problem lies.

I once had a similar problem with another 4x4 vehicle. However the problems were with the rear lights/rear wiper/heated screen etc etc....it turned out to be damage to the wiring loom as it passed under vehicle on its way to the back. Check as much of the harness as you can see/get to for damage.

The common factor for the interior light and central locking mechanism is the TCU...timer control unit...might be worth checking that...since it dont seem to be turning off the interior light and central locking is not working.

Hi,

Ok, the interior light is ok, what i was meaning was the " door open" symbol on the speedo panel was on and no radio/cd working or the clock and central locking so i am assuming that the 10amp fuse covered all of them, which seems a lot of items for a 10amp fuse. i do apologise if i do not make myself clear.

rustygates.

 

[Toolbox]

What about your reversing light is that working?

 

[(RIP) rustygates]

Hi toolbox,

I shall have a look in the morning and report back, thanks again for the info sofar, i dont want to start going through every circuit that this 10amp fuse feeds unless i really have to.
rustygates.

 

[(RIP) rustygates]

Hi,

I checked the reversing light and it's ok,

I will dig the cd manual out and trace some of the circuits out soon, and i forgot to say that the fuse is blowing with the ign off but the "door open" symbol stays on when ign is turned on.

rustygates.

 

[extreme-4x4]

wiring from body to door then id guess

 

[lacroupade]

wiring from body to door then id guess

don't you mean to the body-mounted rubber-covered microswitch?

 

[extreme-4x4]

don't you mean to the body-mounted rubber-covered microswitch?

no... :lol:lol:lol
i mean the wires that run from the body near the hinges to feed power to the door

or as you say the
body-mounted rubber-covered microswitch

 

[lacroupade]

no... :lol:lol:lol
i mean the wires that run from the body near the hinges to feed power to the door

or as you say the
body-mounted rubber-covered microswitch

but what i'm saying is, if its got a 'door open' light that implies theres something wrong with that switch (which is mounted on the body) doesn't it, or backwards from there? i.e. interior wiring not in the door.

If the switch is OK (its just one screw holding the rubber cover in place) there could a short in the wiring circuit somewhere.

Mind you, that supposes that switch controls the 'door open' warning light AND the interior light, as I'd expect the latter to come on as well if it had a short?

RUSTY are your courtesy lights working or are they fused as well?

 

[(RIP) rustygates]

Hi all,
just been and checked there is no courtasey lights working on any of the 3 doors, you are getting closer lads, by the way where are the switches that work the courtsey lights ?.

rustygates.

 

[lacroupade]

Hi all,
just been and checked there is no courtasey lights working on any of the 3 doors, you are getting closer lads, by the way where are the switches that work the courtsey lights ?.

rustygates.

open the drivers door and look at the bottom left hand corner of the opening - theres one on each door....also see if one of the bulbs in the courtesy lights have blown, might be a short there?

 

[Toolbox]

Wouldn't think it would be the door courtasey light switches as these just make an earth conection any short on the wiring to them would just keep the light on and not blow a fuse.

 

[(RIP) rustygates]

Hi;
tomorrow i will start by removing interior lamps front and rear then check the fuse and move on to the door switches, process of elimination and check fuse and report back, your help is much appreciated, i do most mechanical jobs on the terrano and even welding, especially the exhaust, never bought an exhaust in 8yrs, but the wiring and electrical faults do test my patience so thanks again.

rustygates.

 

[rossco]

Hi all,
Just noticed this morning, no central locking and no radio and no clock and and the doors open light is on continually, after going through the fuses there was a 10amp fuse blown (top row ) changed fuse but it blew again so there must be a dead short somewhere, can anyone give me a pointer as to where i go next, before i start doing the "process of elimination" which could take days. thanks

rustygates.

If your open door light is on continually and the fuse is blown then it must be getting earthed between the power supply and the fuse. This is whats causing the fuse to blow.
See Option 1

e.g.
Option 1
Power ----X-------Light symbol ----X------Fuse----------- Door Light------Door (earth)
Short Short
or

Option 2
Power----x------Fuse--------Light Symbol----------Door light------Door (earth)


If Option 2:
If the fuse is blown then no power to the light symbol should happen

So this could point to what Toolbox is saying


Check your wiring behind the fuse and check to see if the others are actually on that fuse.

With the Mistral I have a separate fuse for the audio, interior lamp, and under the bonnet is a 30 amp door lock fuse.

 

[(RIP) rustygates]

Hi,
checked door courtesey switches removed made sure good earth and reconnected. door symbol gone off now so assuming that bit is ok, but fuse is still blowing with ign off, so i disconnected int lamps and fuse still blows, so no clock or radio or c/locking, removed fuse block from it's bkt and there is a blue wire going to one side about 1.5mm and a .5mm red and lt/green going to the other side. under bonnet all the fuses are ok inc fused links, so am i right in thinking one wire either blue wire or red and lt/green on the non ign side is going to earth or is that to simple put.

rustygates.

 

[lacroupade]

well call me a bodger, but if you don't want to waste too much time, why not cut the wires one at a time and see which it is thats causing the fuse to blow, then you can work that one back...

You can rejoin them temporarily with a choc blocked taped up to insulate, then solder them later. Might save some time....:nenau

Just an idle though... (like most of mine!)...

 

[(RIP) rustygates]

Well "bodger" i thank you for your suggestion but no that will never happen it's totally impractical and knowing my luck it would be the last wire that i cut would be the one, no there has to be a more scientific way, if only the cd manual was in layman's language and in colour it would be easier, but hell the terrano keeps going so i can play with the wiring and offending components when i have time and can still lock it using the key if not the keyfob.

rustygates.

 

[extreme-4x4]

these are all items that do not need ignition to work. so could be
the small wires to the battery

 

[(RIP) rustygates]

Hi all,

Update on blown 10 amp fuse problem, my brother came with his meter and tried to sort out problem, we discovered that the fuse box has power coming in on a busbar and the fuses carry power out not as i thought, anyhow we tried various things like stripping back sheathing to try and trace the offending wires but to no avail, removed and replaced relays, and replaced the 10amp fuse and everything is back to normal, so we don't know what we've done but it all works, which is good, but not knowing what the problem was is very annoying and it could happen again! so thanks for your effort in sorting it out.

rustygates.