H4 Headlights and relay
 

Upgrading to 100 watt H4 headlamps on my 73 2.0. Can anyone recommend the necessary relays I will need to protect my wiring and light switch? Any information on wiring would be helpful also. JWest makes a kit but it is for 911's.
Thanks,
Mike

mike h4s plug right in no need for extra wiring. Were an original factory option for the cars in europe

Thanks.

Might depend on the bulb. Sealed beams are 30 to 60 watts. A halogen bulb in the same range, like 55 watts, should not be a problem. 100 watt bulbs could cause problems.

Yup typically the trouble is the increased current load running thru the old wiring and switches in an un-relayed circuit, when trying to go to 100W+ upgraded bulbs. If you stick close to OE 55/65W bulbs you should be fine.

Have you considered going to LED headlights? Plug and play with a lot more light and lower draw on wiring than stock headlights. That's what I did on my car. On the 914 it is especially nice as the lights are usually down so the different appearance of the LED is not a big deal.