Peculiar electrical episodes

[Scooby P1]

When I had my lights turned on tonight, every time I went to main beam it momentarily turned my radio off, but immediately back on again.

Then after more miles, the same thing happened when I indicated too.

Did not happen when I turned the lights off.

Then, suddenly, all of this stopped and everything worked normally. then my interior light suddenly flashed for no reason.

All during a 2 hour nighttime journey.

Odd?

One more thing - does anyone's water temp ever go lower?? Mine went to 80 degrees tonight when it is normally ALWAYS 90 without a flicker. Motorway driving, at night without pushing it. Back to normal in traffic. Is that simply engine cooling working better in lower temps with low rev driving?

Quirky things these Nobles....

[Fixanything]

Sounds like you have a bad earth somewhere that is common to those items. If it happens again you could try running an earth wire directly from the battery -v and connect it to the local earth, say the case of the radio and see if this clears the problem.

[daddysumo]

Your water temp didn't change, was the signal/voltage to it from the ECU that changed as the temp gauge is programmed via the ecu to always read 90 degs unless the water temp gets really hot,(unless you have had this changed) then it will just go straight to the red... so as suggested checking all your earthing points is a good place to start.

[Blu3R]

+1 & +1

Earths are the first place to start.

[Scooby P1]

Sounds like a job for Matt and Dave whilst I have all my water pipes changed as they are starting to get old and rather hard....leaks follow....

[andygtt]

Scooby P1 said:

as they are starting to get old and rather hard....leaks follow....

are you talking about Matt and Dave here?

[Scooby P1]

ha ha - not far from the truth!

[r10crw]

Hi,
Sorry for digging up an old topic, did you find this common earth fault?
I have exactly the same symptoms, interior lights coming on at random, radio on/off with lights.
Guess there must be a common earth in the footwell but diagrams just show a common splice but no indication of where.
Craig.

[Scooby P1]

Might be worth asking Dave at JS as he was the one who sorted it all in the end. Apparently it was down to a serious wiring mess in the back end somewhere from what I remember Matt saying.

Mind you, the interior light still has a mind of its own but the rest seems ok. Unless you spill a load of water down the front of the engine / gearbox as the steam whilst it evaporates causes havoc with all sorts of electrics!

But that's a unique case.