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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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940 headlights very dim with ageViews : 7379 Replies : 91Users Viewing This Thread : |
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Apr 24th, 2017, 13:42 | #21 |
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Relay
I would be a bit careful with 100/90W headlamps, as I already think with the standard 50W ones the relay gets rather warm. As the heat is created by resistance in the relay contacts it might even be worse when the relays get older in time. If you take out the ashtray and you can check the temperature of the relay housing after the headlamps have been working for some time. It is the single relay with metal housing in the front.
I recently changed the H4 bulbs for LEDs and the improvement is dramatic! I also did the sidemarkers as their yellow stood out too much compared to the very white headlamps. Another bonus is the 25W power consumption versus the 50W of the H4 bulbs. http://www.nssclighting.com/5s-9006-...-p00075p1.html Straight fit, no issues. The braided cooling strips can be folded away nicely inside the headlamp unit. |
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Apr 24th, 2017, 20:14 | #22 |
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Thanks for that Rversteeg.
I'll take a look at the relay. Two 50-watt bulbs is only 8A total, so if the relay is overheating at that current, I'd count it as defective. Probably needs opening up and contacts resurfacing with a diamond file. Of course, it's even possible that a relay with imperfect contacts is the reason why the headlamps were insufficiently bright in the first place. |
Apr 25th, 2017, 10:04 | #23 |
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the relay only switches the live side. The real problem is the contacts on the dip switch (high/low beam switch). These are definitely in trouble once they are told to carry 200w loads.
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Apr 25th, 2017, 19:19 | #24 |
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Led
I fitted some LED headlamp bulbs the other day my mate bought them round as a present because he noticed how ****e my headlamps were. they are fantastic, I can actually see in unlit lanes now! I will take a pic later of the box...think they were about £20 on ebay. WELL worth the money imo.
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Apr 26th, 2017, 19:51 | #25 |
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LEDs are improving all the time, if you have a good solution then please post the link and preferably a photo of the bulb/packaging, specs etc.
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Nov 16th, 2018, 12:46 | #26 |
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Hi to All
Thread resurrection My headlights are now so dim I must get around to buying a pair of LED lamps for fitting this autumn/winter Most of the links in this thread no longer work Can somebody link me to LED H4's to fit my 940 please? Many thanks
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Nov 16th, 2018, 14:47 | #27 |
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I suggest: fundamentals first. The headlights were obviously OK previously. They have declined.
I don't know about your model of Volvo. I am from upstairs, the 240 section. The 240 issue is that reflectors corrode. Headlights consequently dwindle. It's not an absolutely easy thing to fix but, well I managed to replace my headlight reflectors. What I am saying is this. What is the actual cause of your headlights becoming dim? If the reflectors are corroded, brighter light sources will be trying to work shine via corroded reflectors. What is the actual cause of your headlights decline? Fitting LED will not address that cause. Fitting LED is a separate issue. Fist get the basics right. I am trying to help. |
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Nov 16th, 2018, 15:19 | #28 |
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On re-reading this thread. Ahem. You still need new headlight reflectors. Init?
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Nov 16th, 2018, 16:40 | #29 | |
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Is your car roadworthy? Yes. I am feeling feisty today. But then again I am full of a Shakespearian feeling re the EU. How DARE any prime minister of Her Majesty bring to Parliament a treaty that the Kingdom cannot leave without permission??? Theresa May proposes a whole new chapter in Erskine May. EEK. "This England never did nor never shall lie at the proud foot of a conqueror save when her princes first did do Her wrong." . Last edited by Stephen Edwin; Nov 16th, 2018 at 16:47. Reason: Bad spell. |
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Nov 17th, 2018, 08:20 | #30 |
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I'm quite interested in the outcome of this thread as the lights on my hearse are less than brilliant! Although it probably has ancient bulbs. Could we compile a checklist for troubleshooting dim lights? I'm new to the electrickery scene but reading this thread has thrown up some common suggestions:
1. Check earth connections, cable crimps etc(any specific cables/areas?) 2. Check reflectors and headlight lenses for corrosion/algae/cleanliness 3. Something about relays 4. Headlamp bulb integrity/quality/power output/blackened glass 5. Battery integrity/size/output etc
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