Warning Light

[DorsetRoger]

Can someone help before I lose the rest of my hair; why will my ignition warning light not illuminate? I have good battery voltage and also at the input to the bulb holder. With the bulb in the holder I have battery voltage through the bulb at the output side and at the input to the alternator. It is not the bulb as I have tried 4 all of which work across the battery. With my voltmeter across the battery and while cranking the battery voltage dips and rises as the engine speed increases to about 14.8 volts - all appears as expected.

So at the moment I am running with no warning light and am not too worried as the battery is receiving its charge.

May thanks Roger

[stevejgreen]

Re: Warning Light

Early morning thought is that whilst you have a feed to the bulb holder, it has lost its negative return.
there will probably be better replies as the sun is just coming up and I have not had my coffee yet.

[philcoyle]

Re: Warning Light

Morning Roger,

It could be that one of the diodes in the alternator has blown or the regulator is on its way out. What kind of readings do you get if you switch on all the electrics in your car and check voltage at tick over and higher revs. Do not run the indicator lamp wire to earth.

[stevejgreen]

Re: Warning Light

Morning Roger,

It could be that one of the diodes in the alternator has blown or the regulator is on its way out. What kind of readings do you get if you switch on all the electrics in your car and check voltage at tick over and higher revs. Do not run the indicator lamp wire to earth.

Oops, I warned you it was early morning!. But from memory you have a Zetec with an Omex under the bonnet of your Berlinetta.

[daveghunt]

Re: Warning Light

I had this fault on my Berlinetta, it was a alternator regulator fault. Cost £35 at my local auto electrician.

[andyf]

Re: Warning Light

Same here, seems that they don't like not being used for a while!