2004 GU Patrol 3.0 TD Sub tank warning light

I am quite sure I did not press the sub tank switch, have also checked the switch.
Nothing to see here!

Flanker
Are you talking of a warning light on the instrument panel or the light on the switch button??
On Patrol

Also, is the light on all the time, only when the radio is switched on or only when you transmit ?

The warning light on the instrument panel is on as soon as the engine has started.
No light on at any time on the switch.
Does not make any difference what I am doing with the radio.
Cheers

What state is your fuel level in the sub tank, is it low??

Just using the KIS principal mate.

Otherwise I am not sure what else it might be!

The tecnophiles amoung us will be sure to have a say beyond that. Good luck

On Patrol.

Fuel level in Sub tank about 1/4 main tank about 75 % full.
Cheers

hqve u checked the drivers manual, sometimes they use the same warning light for three or more different things, maybe your fuel filter needs draining or something?

Yes Mattie. I am aware of this and have gone to the trouble of disconnecting the radio from the car. pulling the power lead and Aeriel which should eliminate a possible path to the chassis.
I have read a post on this subject.
The solution was to have the computer reset, my opinion is that the control system should be able to handle this without a reset.
Though I had a tow-truck operator leave my ignition on all night in Kunnunara last year. This resulted in all my Keys not being recognised by the Nissan security system. So don't have your battery go flat with the ignition on! but hats another story.
Cheers Peter

Disconnect the battery/ies for a few minutes......resets the leccy bits and you should find it will be okay after that.

Much has been written on this forum about sub-tank light on GU's and I've had the same thing happen to mine too. Disconnect power; reconnect; reset the radio stations....all good!!

Thanks Roachie. I'll try that in the morning.

Cheers Peter

I could not wait until the morning.
It worked many thanks Roachie.
Instead of spending all day climbing all over my Patrol, I should have got on the internet!
It remains to be seen if the problem returns when I re connect the CB though!
I'll keep you posted.

Cheers Peter

Someone on here last year tried to tell me that the most common cause of electrical faults with Patrols is that they are not earthed in the normal way.

WELL HELLO,,,,,DUH.

Open the bonnet of any patrol you wish to inspect and you will find big fat heavy wire from earth of battery to chassis to engine, as on all cars. It is a lie, a trick, a sham. probably by someone who likes to see Patrols kicked around and given a bad name. Not mentioning any names, acchhhoootoyotadrivers, hum, er snifle, let me wipe my nose, achoo !!!

Some people on these forums spread the most unbeleivable rot sometimes. Anyway, glad to hear all is fixed with the sub tank light now.

Sorry Muzzgit, but my Patrol and every GU I have ever worked on DID NOT have an earth wire going to the chassis. It does have one from the battery to the motor and to the body(inside guard), but none to the chassis. The problem is that the motor and the body are rubber mounted to the chassis.
The only electrical component of the car to be fixed to the chassis is the subtank sender and pump wiring, so any other electrical accessories that are fitted to the chassis, eg. spot lights on the bull bar and towbar wiring to trailers etc, try to earth themselves through the subtank wiring, which causes some of these problems. Have a closer look, your earth doesn't go th the chassis!
A simple heavy wire from the body to the chassis solves these problems.
Chaz

I do hope this is the final chapter.
My own opinion and difficult to prove, but this is what I am assuming.
The CB radio was just a coincidence.
The problem has been the starting battery voltage has been intermittently dropping off while I am driving. Causing all kinds of weired things like transmission to change down while cruising at 100Kmh, Cd player display dimming, hands free kit to beep as if I just inserted the phone. I had to pull over near Yatal yesterday.
I quickly got my meter out shut down the engine and checked the Battery voltage.
It was all over the place varying from 7 volts to 10 volts.
New battery fitted all is back to normal.
Cleared the Sub tank fault by disconnecting the battery for 20 Min's.
I found that I had a sub tank warning indication after each battery voltage episode.