No ignition light

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chum17
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No ignition light

Post by chum17 » Fri Oct 12, 2018 5:06 pm

Hi all
I know this has probably had many posts. Started gtc this afternoon . Starts ok but no ignition light and no gauges ....all lights, wipers work ok. I'm sure one of you learned gentlemen can give me some advice. I'm about as far away from being an auto electrician as you can get.
Thanks in advance
Pete



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scimjim
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No ignition light

Post by scimjim » Fri Oct 12, 2018 5:24 pm

Check for loose connections at the alternator first. If they’re okay, measure battery voltage with engine running and engine off to see if the alternator is charging or not.


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No ignition light

Post by chum17 » Fri Oct 12, 2018 5:54 pm

Thanks Jim



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Roger Pennington
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No ignition light

Post by Roger Pennington » Fri Oct 12, 2018 6:31 pm

I had that problem, and it turned out that the thin wire from the alternator had come off it's terminal on the back of the alternator


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DARK STAR
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No ignition light

Post by DARK STAR » Fri Oct 12, 2018 6:37 pm

No gauges?
Speedo at least is mechanical so presumably that works?
I think oil pressure gauge is also, but I may be wrong as usual.
Of the gauges that are electrical, and the ignition light, the only thing they have in common is the earth connection :wink:


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Roger Pennington
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No ignition light

Post by Roger Pennington » Fri Oct 12, 2018 7:06 pm

I make no claims to be an auto-electrician, but unless I'm barking up the wrong red herring, I don't think that's right? AFAIK the ignition light isn't earthed in the dash, it's supplied with 12v from the ignition switch, which is then earthed through the alternator, lighting the lamp. When the alternator starts producing 12v as well, you've got 12v going both ways, and they cancel each other out, and the light goes out?

It might however be that the (electrical) instruments and the light share the same ignition-controlled live feed????


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demonbluedays
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No ignition light

Post by demonbluedays » Fri Oct 12, 2018 7:12 pm

*ahem* Mighty pulled this stunt not long ago, turned out to be the alternator, it whined like hell when engine was running, voltage reading was barely above red. Suspected at first it was fuses until we started to hear it at idle. Did necessitate a new battery last week as well as that had gone too


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No ignition light

Post by chum17 » Fri Oct 12, 2018 7:29 pm

Thanks guys...will have a look tomorrow.



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DARK STAR
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No ignition light

Post by DARK STAR » Fri Oct 12, 2018 7:29 pm

I think you're right there Roger, feed for the ignition light comes from the ignition switch and the alternator.
But I'm pretty sure I am right about the gauges, so why have they failed at the same time ...
Oh yes, it's a Reliant :lol:


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No ignition light

Post by chum17 » Mon Oct 15, 2018 9:48 am

Thanks for the posts....the ignition module was sitting in washer fluid due to the washer bottle previous repair leaking. The adjacent earth and two connectors were cleaned and the alternator plug cleaned. All now working as it should.
Unfortunately the car has not been used recently due to ill health ....It is a Scimitar and needs to be used regularly.
Are washer bottles still available for gtc from club traders ?



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demonbluedays
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No ignition light

Post by demonbluedays » Mon Oct 15, 2018 10:28 am

My se6 has a non original one with pumps fitted that cost less than £20 all in, I'll find the invoice later if yoyr interested to let you know where it's from


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Terry H
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No ignition light

Post by Terry H » Mon Oct 15, 2018 10:38 am

You could buy two of these https://www.ebay.co.uk/itm/TVR-ACP-1-2- ... 2749.l2649 and fit one in the cubby at the rear of the car and replace the leaking one with the other.
Regards Terry H
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No ignition light

Post by Corky » Mon Oct 15, 2018 10:42 am

Graham had some washed bottles a few years back. Maybe worth a call. It’s not an uncommon problem for washer fluid to be dumped into the ignition module on a gtc. Generally it tracks into the plugs and that’s when the verdigris develops and the connections weaken. It’d be worth giving these a thorough clean to prevent a recurrence.


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No ignition light

Post by chum17 » Mon Oct 15, 2018 11:52 am

Will give them a call....I guess that could explain the white cables going into the connectors by the module are becoming quite warm



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No ignition light

Post by demonbluedays » Mon Oct 15, 2018 8:06 pm

You beat me to it Terry :mrgreen:


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