Euro Driving Lamp install

[Mike Kunz]

Hey,

I scored some European H3 driving lamps off of German ebay for $30 in great shape!

Swap over to the euro lamps from the US fogs was easy and I upgraded to 100W at the same time....question is, has anyone written a step by step instruction on wiring an additional relay into the foglamp circuit?

In the euro version, would the driving lamps have come on with low or high beam or both? Haynes seems to indicate on a euro car that there was no separate switch, so I'm unclear as to when these things would come on, i.e. if they were meant as additional high beams or what....

Would appreciate any help on the relay wiring someone could give.

Thanks,

Mike

[campbellcj]

Nice score. If they are the 'real' Hella 118 driving lamps that came optional from Porsche, they are worth $300-400 here in the US.

What I have done before is simply keep the existing foglight switch, but move the fuse panel wire over to the highbeam terminal.

Relays are pretty simple to wire up and I probably have some tech articles stashed away if you can't find on on this site. There is a "pre-wired" Hella relay kit that is especially easy; plug n' play and comes with directions.

[Mike Kunz]

Thanks, Chris.

Yep...they are the OEM ones. I was surprised that the glass lenses were a little larger than the fog versions...housing is basically the same except for the connections inside.

For wiring the relay, what I understand is that I have to run a heavy gauge fused wire forward from the battery to where I want to mount the new relay and connect to circuit 30 (+).
I'm thinking I might add another small fuse box for future other consumers (amp).
Relay terminal 87 is run to the lamps (splicing into original wire to lamps?), but I'm not clear as to the rest with respect to where and if the remaining two terminals connect into the existing harness, old fog lamp relay, switch, etc.

My current setup has the lamps working with the parking lamps only and with low beam...I will move the input wire on fuse one to fuse 3 and that should switch the driving lamps on with parking lamps and high beams, right?

Thanks for your help.

Mike

[campbellcj]

It's been a couple years since I messed with this kind of thing, but here is a pic of the quick 'tweak' I made on a previous 914 to get the driving lamps to work with the highbeam circuit.



I have an unorganized small collection of lighting info and pics, including some relay wiring info, here:

http://www.nosubstitute.org/lighting

If possible, you definitely want to power your aux relay(s) directly from the battery (an inline fuse is also a good idea). This is one area where the 911's configuration is a big plus -- the fuse panel and left-side lamps are about a foot from the battery!