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Post by PatMcCoy on Apr 8, 2006 15:44:32 GMT
I bought some new halagen headlights Do i need a relay Or can i put in a inline fuse
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Post by RichardF on Apr 8, 2006 16:42:01 GMT
Pat, By all accounts and past threads you will need to fit a relay. Even with the original lamps, the lighting switch was prone to being overloaded, so the extra load from halogens would seem to guarantee a problem. Sometime in the next few months I intend to do the same (bought the headlamps already). I have in the meantime been drawing up a wiring circuit which incorporates relays. RichardF Southampton
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Post by dorsetflyer on Apr 8, 2006 17:55:17 GMT
Definitely use a heavy duty relay whenever you change to halogen lamps. My 3 litre coupe had these lights and I ended up with a cooked switch (sidelights) which caused all the lights to go out while travelling in the dark on the motorway. The relays don't cost much and I have them ready to fit once I can get going again before I start using it.
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Post by Deleted on Apr 12, 2006 12:01:44 GMT
Any recommendation as to where a relay can be purchased. I bought Halogen headlights from Vehicle Wiring Products, but havn't fitted a relay, maybe they have them?
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Post by Phil Nottingham on Apr 12, 2006 12:19:27 GMT
They stock minature HD relays as well
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Post by dorsetflyer on Apr 12, 2006 14:56:42 GMT
The relays from Vehicle Wiring Products, either R20B or R40B are under £2 each.
There was an article in 'Practical Classics' on this subject last year. I think it was in the June edition. Good for reference purposes.
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Post by Deleted on Apr 18, 2006 11:51:04 GMT
Thanks guys, I will invest in a couple of those!
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Post by Deleted on Apr 19, 2006 8:12:48 GMT
No gentleman should be driving around after dark anyway. ;D
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Post by Deleted on Apr 19, 2006 8:18:19 GMT
If the Halogen headlamp bulbs are the same wattage as the originals, why do you need to uprate the wiring etc and add a relay? If the current drain is the same as before, why do we need to add a relay etc? I just wondered why.
CHeers
Freddy
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Post by Phil Nottingham on Apr 19, 2006 9:34:52 GMT
As I mentioned before, on the P5B particularly the switch is up its maximum load and can very easily overheat (try touching it after its been on for a while) this usually leads to melting the cable and terminal insulation followed by failure of the lights usually in the pitch black miles from anywhere!
It also gives max volts to the lights.
I have seen very few P5B and even P5's which had less powerfull main beams without evidence of the switch overheating
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Post by Deleted on Apr 19, 2006 11:19:25 GMT
Thanks for that Phil. By the way, will you be going to The Chequers at Ullesthorpe on St Georges Day? If so, we look forward to meeting you both there. Kind regards Adrian.
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Post by Phil Nottingham on Apr 19, 2006 16:58:35 GMT
No - I have to go out to collect items to refurbish the kitchen which has got to be done this year - its 4 yrs today when we moved here.
We will be out in our classic S11 LandRover though!
In between times I am still piecing togther the P5 Coupe after changing the engine/gearbox. Things seem to take three times longer these days as I have to keep resting!
We have booked into Catton on 30th April and also the Rotary Lichfield show on July 2nd though
Remember us to all and hope your Coupe gets sorted out without too much hassle
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