ignition key turned on (not started) but no red ignition light on

Gunter Butfuster · Apr 7, 2020

Hello,
I'm visiting family and not at home due to lockdown. No manual with me. I have a 1994 range rover classic softdash V8 3.9
The red ignition light has suddenly stopped working. All other dash lights work plus rev counter. Checked the alternator output, showing 14.75v. - 14.95v
I checked the bulb, swaped it with another working bulb.
Anybody got any idea where to start looking next?
Would appreciate any help to find the cause of the problem.
Cheers, Paul

Western Slope Rover · Apr 7, 2020

Does it start?

Edit: Of course it does. That's how you tested the voltage. Did you check the voltage under load?

Flossie · Apr 8, 2020

A grown up will be along shortly with the correct answer but....(going off memory...) Isn't the bulb earthed when the alt' starts charging?
So my guess is the positive feed to the bulb isn't there .
Best wait for a grown up.

discool · Apr 8, 2020

Maybe an iffy link on the dash PCB, or the wiring from your alternator or the alternator regulator is on its way out .

Ratae · Apr 8, 2020

Locate the warning circuit wire at the alternator end of the wiring.
Ignition on.
Touch the wire to a good clean earth.
Warning light should come on if that part of the circuit is OK.

Gunter Butfuster · Apr 8, 2020

Western Slope Rover said:
Does it start?

Edit: Of course it does. That's how you tested the voltage. Did you check the voltage under load?

Under load 3000 revs 14.86 does intially spike to 15v for a second then settles. Only spiked twice out of 6 seperate tests under load.

Gunter Butfuster · Apr 8, 2020

Flossie said:
A grown up will be along shortly with the correct answer but....(going off memory...) Isn't the bulb earthed when the alt' starts charging?
So my guess is the positive feed to the bulb isn't there .
Best wait for a grown up.

As long as it's someboby online. Don't want anybody to get nicked for non essential buggery! I'll start tracing the wiring and check connections. Was hoping it was the alternator, just nut and bolt job.

Gunter Butfuster · Apr 8, 2020

discool said:
Maybe an iffy link on the dash PCB, or the wiring from your alternator or the alternator regulator is on its way out .[/QUOTE
I'll take a look. Many thanks.

Gunter Butfuster · Apr 8, 2020

Ratae said:
Locate the warning circuit wire at the alternator end of the wiring.
Ignition on.
Touch the wire to a good clean earth.
Warning light should come on if that part of the circuit is OK.

Ok, cheers.

Flossie · Apr 8, 2020

Gunter Butfuster said:
Ok, cheers.

With the ign turned on, don't forget that!.

ignition key turned on (not started) but no red ignition light on

Gunter Butfuster

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Western Slope Rover

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Flossie

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discool

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Ratae

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Gunter Butfuster

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Gunter Butfuster

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Gunter Butfuster

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Flossie

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