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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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whats going on with my lights?Views : 1095 Replies : 7Users Viewing This Thread : |
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Jul 7th, 2010, 17:47 | #1 |
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whats going on with my lights?
Hi all,
I have a 1988 volvo 740, and the 'blown bulb' dash light is constantly on...all of the bulbs work fine, i've narrowed it down to the daytime running lights, on the driver side at the front, the bulb is lit, but only very dimly, the otherside however is great, I've even swapped the bulbs round and changed them for the correct new ones, still the same problem with the one side, i've tried cleaning the contacts, wd-40 incase water was getting in, i even found an earthing point from the bulb wiring and took that off, cleaned it, wiggled it and its still the same... any ideas? Thank you in advance! |
Jul 7th, 2010, 17:54 | #2 | |
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Last Online: Jun 2nd, 2013 22:00
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Location: salford
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Another weird thing is when i fiddled with the radio, (removed the horrid ford botch job, replaced it with the original one) the blown bulb light went out only to come on each time i pressed the brake pedal.......i then fiddled with the radio once again to fit the proper fascia on and now this blown bulb dash light stays on all the time again....damn electrical gremlins! |
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Jul 7th, 2010, 18:05 | #3 |
Premier Member
Last Online: Apr 24th, 2024 19:52
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Location: Cranfield
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If it made a difference when you pushed the brake pedal, you could always go round the back and try cleaning the contacts there too. Especially the rear light/brake light bulb on each side. My bulb out light does this every now and then, it just required the contacts to be cleaned.
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The Following User Says Thank You to Chris740R For This Useful Post: |
Jul 7th, 2010, 18:14 | #4 | |
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Location: salford
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Cheers, i'll do that and get back to you :-) |
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Jul 7th, 2010, 22:00 | #5 |
VOC Member
Last Online: Nov 6th, 2016 10:18
Join Date: May 2009
Location: Blackpool UK
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Make sure the bulb holders are 100% intact for the front day running lights as they tend to crack over time from the heat and don't hold the bulb correctly leading to all sorts of strange faults on the lighting circuit (I had this happen on my last two 740's) - Mike
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Jul 8th, 2010, 10:19 | #6 |
Mr G
Last Online: Jun 12th, 2020 19:11
Join Date: May 2007
Location: north yorkshire
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sounds like a short maybe? are you sure the bulb holder is the correct type for the dual filament bulb? its not uncomon for people to have changed them and not used the proper one. do the spades in the base of the holder look ok? not bent or anything? check if when you press them in, is one moving and trying to toch the other? (assuming yours is the clasic 740 front with dual filament bulb) if it is, can you confirm if its the 21w filament thats actualy glowing, but dim, or is it the 5w thats glowing?
as chris said the fault can flip roudn the car, check the ground leads coming from your tail lights.. them wee bugers can cause allsorts of weird reactions!
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will the jimousine ride again? previous models 940 TDI360 GLT 480 ES 740 GLE 940 SE 760 Executive 940 GL 850 GL 760 TIC V70 Torslanda Last edited by Jim760; Jul 8th, 2010 at 10:25. |
Jul 9th, 2010, 12:49 | #7 | |
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Jul 9th, 2010, 12:54 | #8 | |
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in both front lamp holders are dual filament bulbs, so and the other side works fine, so i'm assuming that the holders are right, sine the pins on the side of the cap only enable the bulbs to fit in one way round, the connectors look a little grey, they seem to be tight in there and secure, though i can confirm that the spades aren't touching eachother as they still have their springness in them and a well away from one another (3-5mm), I'll check back to you tonight as to which filament is lighting up, and i'll file the earthing points to get them back to shiny metal and see if that helps if not. thank you for your suggestions |
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