Causes Of Ignition Not Turning Off

[CallMeLegend]

How annoying.

Replaced the switch with a known good unit. Still doesn't switch off. Wondering if faulty diode pack/regulator in the alternator could be causing it.

[GeoffSmith]

As I said before, it is possible but unlikely, however you have ruled out some of the more probable causes. It's probably not an easy thing to do, but I would unplug the alternator and see what happens.

[CallMeLegend]

As I said before, it is possible but unlikely, however you have ruled out some of the more probable causes. It's probably not an easy thing to do, but I would unplug the alternator and see what happens.

That's my next move.

Other than that at the moment I'm stumped.

Wiring all looks to be in good order

[GeoffSmith]

A couple of questions for clarification Mark:
How do you stop the engine?
What happens when you undo what you did to stop it - does the ignition come on again or does it not come on until you've started the engine?

[Simon_P]

And have you worked out why the voltage gauge isn't working? And what is the voltage when running?

[CallMeLegend]

A couple of questions for clarification Mark:
How do you stop the engine?
What happens when you undo what you did to stop it - does the ignition come on again or does it not come on until you've started the engine?

I stop the engine by stalling the car (brakes on, in gear, let clutch up gently)

[CallMeLegend]

And have you worked out why the voltage gauge isn't working? And what is the voltage when running?

Voltage gauge does work

[GeoffSmith]

A couple of questions for clarification Mark:
How do you stop the engine?
What happens when you undo what you did to stop it - does the ignition come on again or does it not come on until you've started the engine?

I stop the engine by stalling the car (brakes on, in gear, let clutch up gently)

Is the ignition still on afterwards?

[Rambo]

And have you worked out why the voltage gauge isn't working? And what is the voltage when running?

Voltage gauge does work

No voltage registering on dash guage so small drain, hopefully alternator regulator.

???

[CallMeLegend]

A couple of questions for clarification Mark:
How do you stop the engine?
What happens when you undo what you did to stop it - does the ignition come on again or does it not come on until you've started the engine?

I stop the engine by stalling the car (brakes on, in gear, let clutch up gently)

Is the ignition still on afterwards?

Yes. I have to disconnected the battery.

[CallMeLegend]

And have you worked out why the voltage gauge isn't working? And what is the voltage when running?

Voltage gauge does work

No voltage registering on dash guage so small drain, hopefully alternator regulator.

???

I ment when the ignition is off, still have a battery light on, unless I disconnect the battery

[Simon_P]

It's probably not an easy thing to do, but I would unplug the alternator and see what happens.

Pretty straight forward to unplug the regulator - same as for an oil filter change, plugging it back in can be a challenge though. That would check the VR, but it is strange that the light doesn't go out when the ignition switch is off - That should make it open circuit? and it is the same feed as the Volt meter which is reading zero (I think!)

I stop the engine by stalling the car (brakes on, in gear, let clutch up gently)

Far more relaxing to use the Inertia switch or remove the fuel pump fuse.

Do you have anything using the A/C wiring?

[CallMeLegend]

It's probably not an easy thing to do, but I would unplug the alternator and see what happens.

Pretty straight forward to unplug the regulator - same as for an oil filter change, plugging it back in can be a challenge though. That would check the VR, but it is strange that the light doesn't go out when the ignition switch is off - That should make it open circuit? and it is the same feed as the Volt meter which is reading zero (I think!)

I stop the engine by stalling the car (brakes on, in gear, let clutch up gently)

Far more relaxing to use the Inertia switch or remove the fuel pump fuse.

Do you have anything using the A/C wiring?

A/C ? Do you mean air conditioning?

[Simon_P]

Yes Air Conditioning, there's a position for the switch which has all of the wiring. It is common to use it to power an accessory. The feed from the ignition switch is common so an incorrectly wired accessory might bypass the ignition switch.

[Rambo]

That is a distinct possibility knowing Stevo

[Simon_P]

it should be reading 12+V at rest and ~14 +V with the engine on

With a meter measure the voltage with the engine running.

And have you worked out why the voltage gauge isn't working? And what is the voltage when running?

Voltage gauge does work

The suspense is killing me!.. Answers on a postcard?

[Simon_P]

I might be wrong but it looks like 13v with a +-0.1v ripple. Interesting?

[CallMeLegend]

it should be reading 12+V at rest and ~14 +V with the engine on

With a meter measure the voltage with the engine running.

And have you worked out why the voltage gauge isn't working? And what is the voltage when running?

Voltage gauge does work

The suspense is killing me!.. Answers on a postcard?

As soon as I can get to the car I'll check. It's kept 65miles away at the moment.

[CallMeLegend]

Voltage when engine running is a slowly rising 12.29v rising to 12.48 after a couple of minutes.

Voltage gauge on dash is working.

[Rambo]

Your alternator isn't working ccorrectly as I suggested previously You should get ~14+ V across the terminals. Immediately and not a gradual increase as you are experiencing.

I suspect your regulator/diode pack.There have been mutiple examples of alternators packing up in recent times