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Hammer-based simpleton
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Discussion Starter · #1 ·
Thinking of doing the above, on the face of it seems nothing's needed as the wattage is the same. Yet I found the odd post saying to add relays..? Surely 60W is 60W. But then I'm electrically hopeless.. Are relays really needed?
Thanks.
 

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Delinquent in denial...
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I changed to H4 halogens on my Mk1 Escort a few years ago and didn't fit relays. It's still on the original wiring and although it doesn't go out in the dark often, when the lights have been used there have been no problems. :tup:

Matt
 

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60W is 60W whether Tungsten or Halogen. The thing with Halogen is that it's tempting to go 80/60 or 100/80 or 130/100 or 160/100 and that's when you need a relay to protect the switch.
 

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Done on numerous cars over the years without rewiring. 60w is 60w although from memory dip on sealed beam was 45 and it's 55 on H4s.
In practice it's not as if they used thinner wire or weedier switches for the dip circuit vs main and 10w at 12v is just under an amp differnence anyway.

I experimented with 80/100w bulbs too, but they weren't much brighter, didn't last as long and were annoying to poor souls coming the other way so I gave uo on 'em.
 

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I ran 100/80 on a standard switch without problems and did a reasonable amount of night driving. Now have 160/100 with a relay on the main beam only (Mmmm maybe time for a relay on the dipped....) but with thick wiring, and every car coming the other way dips first but never flashes me. Bullb life has been good. You can get blue-white xenon/whatever.
 

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I use relays. On my 55 the previous owner had fitted halogens and changed nothing else. The switches are known to be a weak point on them and the wiring is also considered a resistance. First time I used it for any time in the dark the switch melted. Relays and new wiring and all is much brighter.
This was a common mod on Jensen Interceptors as well as for many people upgrading older British cars. The Jensen switches were overloaded from the factory and prone to igniting.
Adding relays is a doddle.
 

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Yep easy to fit a relay,well easier than rewiring lol
Also if your running a dynamo you might want to fit an alternator,otherwise your battery won't last long!!
 

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I went straight from 37.5 w tungsten sealed beam to new reflectors with Zenon upgrade bulb - same wattage as Halogen, 50% brighter AND EU compliant - can now 'compete' out there in the dark with current cars!
 

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Hammer-based simpleton
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Discussion Starter · #11 ·
Thanks very much one and all. I really am an electric simpleton, wouldn't try to add relays to be honest... sad I know and I am embarrassed by it.. most I ever managed was rewire the arse end of my Landy. I'll look at the other options mentioned. But prob stick to halogen for simplicity and cheapness. Do know a local sparky who would help me out needs be.
Thanks again.
 

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relays for me every time now ,no had a bit of bother with the 55 since she went on the road,had lots of trouble with old vauxhall switches when on main beam with twin head lights, relays cured them an gave stronger lights.cant see the point of taking the chance of a failure or worse a fire.
 

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Semi Proffessional Prat
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There is another point here.
If you have sealed beam, it must be an older car, and therefore old wiring. Older wiring deteriorates, breaking down insulation, and going higher resistance.
I wold therefore recommend the use of relays. Skcollob, it is not at all difficult to add relays, I could talk you through it.
 

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Thanks very much one and all. I really am an electric simpleton, wouldn't try to add relays to be honest... sad I know and I am embarrassed by it.. most I ever managed was rewire the arse end of my Landy. I'll look at the other options mentioned. But prob stick to halogen for simplicity and cheapness. Do know a local sparky who would help me out needs be.
Thanks again.
Hi skollob,

I guess your Kambs is Cambs that being the case if you run into problems give us a shout i am only over at Huntingdon.

Cheers.

Russ. 07762 - 747643.
 

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Hammer-based simpleton
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Discussion Starter · #16 ·
Guys thank you very much. It's a '66 Minx and the wiring is original, two-fuse system and all. I take the point about ageing etc. Many thanks Russ, that would be great, maybe when it's on the road I could pop over and soak up some advice... (I'm in Histon, or Bar Hill for work). Just into finishing mods and painting at the mo'.
Thanks for the help everyone.
 

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Yep easy to fit a relay,well easier than rewiring lol
Also if your running a dynamo you might want to fit an alternator,otherwise your battery won't last long!!
When Blue was working 10 miles away through last winter, going to work in the dark and coming home in the dark. Lights on (halogens) heater full chat and wipers going, In her Moggy with original dynamo and wiring, Never had a problem with the battery, and its only a little £30 battery. It now does little bits of running here and there, still no probs. My Cortina used daily, some long some short journys. Its got a 12 cd changer thats allways on, no problems either. Just saying that there is no need to fit an alternator, if you are killing the battery with normal use ( even with some extra lecy stuff) its cus the dynamo or reg box is faulyty, And normally easily fixed.
Dont sell the dynamo short, it does and has worked for many years.
Martin.
 
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