whats the blue light for?

any idea what the blue light is for thats next to the blower fan switch on a 78 series 3?
dont know how to put photos on here but pic is at:-http://www.ebay.co.uk/itm/300611924988?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

Main beam ??

Main beam is with the gauges. It's either brake warning or low fuel - is it a diesel?

yep its a diesel and main beam is with the guages. could it be the charging/failing to charge light?

"cos of the risk of filling the pump with crud or air the diesels have a fuel gauge and low fuel warning light. It's probably this - what colour are the wires attached to it?

i will go and look now

Why are you selling it on fleabay :doh:

Charging light is normally on the clock with temp and fuel gauge...........my guess is its an aux warning light......fogs/reverse/spots

white and white with green tracer.

no not selling it, read the listing on flea bay it may put a smile on your face, couldnt work out how to put a photo on the forum.

oxides said:

"cos of the risk of filling the pump with crud or air the diesels have a fuel gauge and low fuel warning light. It's probably this - what colour are the wires attached to it?

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Dint know later Series' had such high faluting electrickery

borristherat said:

white and white with green tracer.

no not selling it, read the listing on flea bay it may put a smile on your face, couldnt work out how to put a photo on the forum.

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Am sure when I changed the speedo on mine it was same colouring for the main beam...... Or was it the dash illumination..... Bugger, can't remember now !!!

blue beasty said:

Dint know later Series' had such high faluting electrickery

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well I never you learn something everyday !

i take it that as the fuel guage is reading half a tank yet the warning light is on and the temp guage is in the red, yet temp is normal i should be changintg the voltage regulator?

borristherat said:

read the listing on flea bay it may put a smile on your face, couldnt work out how to put a photo on the forum.

Click to expand...

Do you have a 'buy it now' price

no i dont have a buy it now as i havnt finished with the paper yet.

white and white/green are the right colour codes for the low fuel light. Check the regulator output - it should be 10v.

On my old Series the blue light was for the main beam and there was a purple light for the low fuel indicator.

OSD

Hi I think you'll find that the blue light next to fan switch on the series 3 diesel is the brake servo low vacuum light, there is a switch fitted in the brake servo on some models. Also some have a blue light for low fuel.

on mine that light comes on when you are low fuel, on mine come on just under a quater of a tank, though mine is a red light not the blue...

Yup, mine's low fuel there in that position (diesel). The lamp looks white / pinky in daylight but illuminates red when below a quarter of a tank of fuel.

mine doesnt have a light