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Posted: **Sun Feb 10, 2008 5:23 pm**

Just fitted a set of 100watt spots and I am wondering the best way to wire them up. Can I simply wire them into the highbeam system or do I need a relay ?

Posted: **Sun Feb 10, 2008 6:33 pm**

Defenately Relay the lights, Will melt wiring if you dont. for 2 x 100w lights wire in with 15a fuse and all should be safe

Posted: **Mon Feb 11, 2008 9:26 am**

I believe you want the middle terminal on the headlamps to drive the relay switch too, correct me if I am wrong somebody...

Posted: **Sat Feb 23, 2008 3:15 pm**

do a relay its really simple to do as well...

Posted: **Sat Feb 23, 2008 4:50 pm**

Thanks guys I used a relay. I actually found a really good wiring diagram.

Posted: **Thu Mar 13, 2008 12:23 pm**

Did you get the wiring right - the lights don't stay on after you've turne the ignition off with the headlights still switched on? When i first wired mine up this is what happened to me til i was told that the car was "earth" switched rather than being positively switched.
Anyway, here's a diagram that i based my wiring on, sorry for the dodgy drawing...

Hope this is the way you did it.

Cheers

Bennie

Posted: **Thu Mar 13, 2008 1:17 pm**

just a note for you

my wiring had a 15A fuse with 2x100 watt driving lights, and it slowly melted the fuse holder :S

this should explain how to work out what fuse you need
current = power/voltage
current = 200w / 12v
current = 16.66 Amps

so with a 15A fuse you probably wont draw enough to blow thw fuse, but it will be right on its limit and cause you issues

next one up is 20A so go with that

Posted: **Thu Mar 13, 2008 7:54 pm**

yeah you can re-wire your standard headlights at the same time installing extra lights - that'll prevent overload.
Cheers
AP

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"Earth" switched wiring diagram