Some dashboard lights not working

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Alex123
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Some dashboard lights not working

Postby Alex123 » Fri Aug 31, 2018 5:04 pm

Hi all,

I've just got my car back from an electrician place to fix what turned out to be a dodgy fuse box. After he put it back together the dash lights have stopped working except the clock illumination and the green indicator light (they worked before). So now I don't have an ignition light, handbrake/brake fluid light or high beam light.

I just had the clocks out myself and it looks like power is going to the plug that goes onto the printed circuit board just fine. The tracks on the circuit board look intact so I was wondering if maybe the culprit is that voltage regulator or the capacitor that sits next to it? I'm unsure though because the temp/voltage guages still work (still need to investigate the fuel gauge; it's been iffy for a while).

Anyone else had a similar problem and could the voltage regulator even cause this?

It's a Mk3 Capri laser 2l

Thanks for any help!

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Andrew 2.8i
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Re: Some dashboard lights not working

Postby Andrew 2.8i » Fri Aug 31, 2018 5:19 pm

Alex123 wrote:could the voltage regulator even cause this?

No. The regulator only regulates the voltage that feeds the temp sender and fuel sender.
If you've had work done on the fuse box, that might be a good place to start looking for a solution.
Have a look at the diagrams on these pages and compare with the wiring on your fusebox:
https://www.tapatalk.com/groups/ccscotl ... xvd1o-cE5s
You could also check that the bulbs in the non-working warning lamps are OK.

Andrew.
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Alex123
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Re: Some dashboard lights not working

Postby Alex123 » Fri Aug 31, 2018 5:36 pm

Thanks Andy, that's a really great writeup.. way nicer than trying to interpret the haynes wiring diagrams!
It says the ignition/brake lamps are on the same circuit as the temp gauge and since that still works..

Maybe it is the bulbs, he did say he changed them so they should be fine, but stupidly I didn't check them while I had it out.
Hopefully it's that simple.

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Re: Some dashboard lights not working

Postby Peter-S » Fri Aug 31, 2018 9:23 pm

Alex123 wrote:Maybe it is the bulbs, he did say he changed them so they should be fine, but stupidly I didn't check them while I had it out.
Hopefully it's that simple.


What sort of bulbs are in there? If modern led type things have been used I have come across some that need earth and live the correct way round otherwise they won't work.
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Re: Some dashboard lights not working

Postby 340truck » Sun Sep 02, 2018 9:43 am

If your car has been to an auto electrician to have a repair done, and when you get it back there are electrical faults like this....why haven't you taken it back to the auto electrician to sort out the faults he has created?
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Re: Some dashboard lights not working

Postby Bod9084 » Sun Sep 02, 2018 11:10 am

Just check the dimmer on the dash by the radio he mite have not put the wire on

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Andrew 2.8i
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Re: Some dashboard lights not working

Postby Andrew 2.8i » Sun Sep 02, 2018 3:03 pm

Bod9084 wrote:Just check the dimmer on the dash by the radio he mite have not put the wire on

That won't be the issue as the OP states that it's the warning lights that are not working, not the illumination.

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Alex123
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Re: Some dashboard lights not working

Postby Alex123 » Mon Sep 03, 2018 5:57 pm

Got it done! Turns out just a slightly dodgy connection between the bulb holders and the clocks.
I would have asked the guy I gave it to to fix it but I needed the car unfortunately. I'm almost glad I didn't because I wasn't that impressed with how he put the dash back together and I was able to take the time to do it neatly.

Thanks for all your help.

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Re: Some dashboard lights not working

Postby pbar » Wed Sep 05, 2018 6:44 am

Alex123 wrote:I wasn't that impressed with how he put the dash back together and I was able to take the time to do it neatly.


No one takes the same level of care with your car as you do yourself, it's always been the case I have found. Glad you're sorted! :)