Wiring halo to headlight wires

szczesd

New member
2003 Z4 2.5i - Attempting to wire my Spyder halos. There are only 6 wires coming into the socket to plug in headlights. Still not sure which of the 4 (2 Tan wires are ground) to use as the hot lead for the halos. The one row has a ground and 2 blue striped wires. I see these are for the directionals. The center blue gives me a steady 12v until I use the blinkers, then its up and down all over the place. The other row has a tan ground and a yellow striped w/ green and a white striped w/ blue. These are for the headlights/high beam. I can't get a steady 12v from either - depends whether the headlights or high beams are on. I want my halos on whenever the the car is on. Anybody advise on which wire to tap?
 
Well you can't - there's nothing in the headlight that has a constant feed. So you can either run an ignition feed from somewhere else or wire them into the sidelights and code those for DRL.
 
MANY THANKS ! Unfortunately, just what I suspected. I was questioning my voltmeter skills there for a while. Onto researching getting a wire through the firewall I think. Great to have somebody knowledgable on the '03 around! Thanks again.
 
There is a switched live in the box on the top LHS of the engine bay (as you're standing at the front of the car). I've used it to get a switched live to my angel eyes, so you don't need to go through the firewall.

You'll need a T25 Torx to get the box open:

C84567EB-B1CC-413D-A9EB-223BBC4E9801_zpsnhqlxqsn.jpg


And a close up of the wire - I've clipped an in-line fuse in there as well (the wire is red with white stripe)

F8671492-42F8-4A86-A0F6-9C3900F92FD7_zpsl8ddmtmu.jpg
 
If you fancy coding it then there are a couple of DRL options - I *think* it's possible to have sidelights as DRLs but haven't tried it myself.
I can have a look at the wiring diagrams if that will help.
 
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