 | Home > Puma (Tdci) > Headlights not working on dipped beam |
 
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| Sam smith Member Since: 12 Aug 2021 Location: Suffolk Posts: 65   
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Still trying to fix my headlight issue, they aren’t working on dipped beam. Sidelights work and main beam both work ok just no dipped lights, any suggestions?
Many thanks! I’m assuming it is a fault with the relay, I have tried swapping round the bottom right one which it is marked on the diagrams as but still no luck. Which one is headlight relay location? Presumably it is the top right? |
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6th Apr 2024 7:55pm |
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| BrickBox Member Since: 05 Oct 2021 Location: Wales Posts: 840  
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Lucas light switch should sort the problem. 10 minute job to swap. 2008 2.4 110 Utility Station Wagon XS.
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6th Apr 2024 8:10pm |
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| Sam smith Member Since: 12 Aug 2021 Location: Suffolk Posts: 65
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Is there a way I can verify this prior to ordering a new switch just to be sure? Cheers |
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6th Apr 2024 9:08pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20474
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Visually and electrically check it with a DMM.
The contacts can burn out (due to load through it), you can get a high resistance reading both sides of the contacts if engaged. Excessively low voltage at a headlight socket are a few examples. (You might be able to check that, from the engine bay side, without removing a headlight from the rear by taking one socket off. If you’ve got a voltage there between ground and the dipped pin, of under 12v Approx then you can probably safely say it’s the switch. A voltage reading may show such as 0.5 v or 6v if the switch has had it or none at all, if the latter then maybe a loose connection, but switch contacts gone as mentioned is most likely culprit. If you don’t own a Multimeter / DMM, then you could borrow one possibly, using one can be very helpful for one of these kind of things if anyone is so inclined to do so there are lots of videos and details online. This is something that’s can be useful to most owners, if you already know how to use one then that’s not a problem at all. Visually checking it works to a point, but may not be particularly decisive. You don’t have a ground issue there by the sounds of it, which is good. It is likely as mentioned that it needs a new headlight switch. 
If you do decide to take a headlight out, be careful of dropping one it can easily be done. Especially if wet. No Guts, No Glory. 🇬🇧🏴🏴🏴🇮🇪🇺🇸⛽️🛢️⚙️🧰💪 |
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6th Apr 2024 11:15pm |
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| nosuchthing Member Since: 01 Sep 2022 Location: Woldingham Posts: 22 
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My 2003 TD5 has just developed the same problem. Did you find the solution? And @custom90 - are you referring to the on/off switch for the lights or the stalk which operates the dip/high beam and horn?
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7th Dec 2024 5:26pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17464 
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Yes, just unplug the switch from the harness and jumper the pins in the harness connector. |
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7th Dec 2024 5:38pm |
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| jaygti Member Since: 04 Nov 2012 Location: essex Posts: 378 
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It happened to me a couple of months ago.
I ended up replacing both headlamp switches to no avail. In the end it was the dim dip relay behind the dash. I didn’t replace it, i just took it outI and put a jumper wire in it instead. 2002 td5 90 county hardtop |
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7th Dec 2024 6:39pm |
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| nosuchthing Member Since: 01 Sep 2022 Location: Woldingham Posts: 22
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Thanks for the tip. I've been reading a lot around the subject online and yes it seems the dim dip relay is the #1 cause of the problem. Will check it out tomorrow.
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7th Dec 2024 7:07pm |
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| nosuchthing Member Since: 01 Sep 2022 Location: Woldingham Posts: 22
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Yes - the dim/dip relay was the problem. A replacement cost £25 and took 5 minutes to fit - a very easy fix.
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16th Dec 2024 2:42pm |
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| jbcollier Member Since: 29 Apr 2024 Location: Edmonton AB Posts: 122  
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Glad you sorted your issue.
The best way to isolate an electrical problem is with a 12v test light and a wiring diagram. Polling the internet for the likeliest cause and changing that without testing can get expensive. |
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16th Dec 2024 8:03pm |
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