sub tank indication

[Nightjar]

Would "Cookster's" 2003 Patrol have a computer?
Had a similar problem with my 2002 and the problem was, my main/starting battery had karked it, and unbeknown at the time, the auxiliary battery was both my main & auxiliary.
My system has a solenoid separating the two, and most of the add ons run from the auxiliary in ign accessories position.

[Cuppa]

Yesterday I filled both tanks & following this the sub tank warning (orange) light came on & stayed on. Drove 20kms, switched off & then started the vehicle again. Warning light still on.

This morning I did two things. 1. Siphoned 5 litres out of the sub tank as I seem to recall reading somewhere that over filling can make the warning light come & 2. disconnected battery for a while. It worked, no warning light now.

Of course I don’t know if siphoning the fuel out was part of the ‘cure’ or not but assuming the initial cause of the warning light staying on was over-filling the sub tank can anyone explain how & why this happens? I’ve previously filled both tanks right up to the filler cap & this has not occurred. ???

[the evil twin]

Hiya Cuppa

1 - If the fault light comes on it latches IE you can turn the vehicle off for weeks but the light will still illuminate next time you start it until you remove power (battery/fuses/unplug computer)

2 - I think the fault was temporary gremlin and may not return

[Cuppa]

Hiya Cuppa

1 - If the fault light comes on it latches IE you can turn the vehicle off for weeks but the light will still illuminate next time you start it until you remove power (battery/fuses/unplug computer)

2 - I think the fault was temporary gremlin and may not return

Hi ET,
1. I read that in one of your previous posts & found it useful. That’s why I disconnected the battery.

2. Gremlins are little bastards aren’t they!