100W H4's into early car...wiring help needed.

[rennch]

I know many of you are going to say "use the search button, dummy", but it's a case where there's TOO much information. Too many results to look through.

I have a 69 T, shiny new H4s, and a pair of relays to power the 100W bulbs I got for them.

Questions:

Do I need to run new wire from the light all the way to the fuse block? Currently it's OEM from 1969.

I don't know how to wire up the relays...is there a schematic pertinent to my particular car I can use? Any detail in this regard very welcomed.

Thanks...and sorry for the obvious repost.

[JeremyD]

Headlight Relays Redux

Uprated bulbs for H5 headlights

[Danny_Ocean]

There is a member that sells a relay kit and it comes with excellent instructions. Perhaps, since you already have the relays, he'll e-mail you a copy of the instructions. Can't remember his name, but someone here will.

If I remember correctly, you only need heavier wire from the headlights to the relays. Everything else stays stock.

[JeremyD]

Marcus Suco

[gsmith660]

needs to be 12 gauge wire or better but the concern in the higher wattage was melting the points together in the switch, I have a 81 harness in my car and have been running 55\100 watt H-1's for 26 years I did fuse a switch but have had no problem with it since I did the relay upgrade 16 years ago. As for your car I would consider running new wire from the headlights to the relay just because in 40+ years the insulation starts to break down then you have that nasty ole electrical fire.
http://www.eagleday.com/neauwi.html
Try these guys they have I believe wire in the proper color code to maintain authenticity and upgrade your wire at the same time

[rennch]

Yes, I do already have the relays, and access to the right kind of plug ends. I'd love the schematic though. Good advice running new wires from the headlights...I'll do that.

[Danny_Ocean]

This pic isn't Porsche-specific, but it will give you an idea:

[rennch]

Danny...thanks, that's a great start. I don't have the OEM plugs in my headlights anymore either...any sense of where the yellow, brown and white wires go?

What gauge should I be looking to get to rewire these?

[rennch]

It would also be quite helpful if someone had a sucro wiring diagram.