Headlight Loom

Lost light to the left pop up headlight, after investigation it turned out that the earth in the loom had split in the section that runs across the front of the car. 

Got a new headlight loom from eBay, with separate relays.

The loom came with the instructions below: 

When you lay out the loom you will basically have 2 halves, one with most of the connectors and the other end with an earth and headlight connector.

This end plugs into one headlight, and a suitable negative/earth near the headlight. Sometimes body mounts that are already in place make good earthing points.

Now the other end, you have 2 relays and again a headlight connector and a negative/earth. Attach this earth to the negative terminal on your battery. Now you will also see there is a male h4 connector this plugs back into the current loom so that you have the switching required to control the headlights.

This is the final part, the positive feed and fuse. Attach the ring terminal to the positive on the battery. Depending on the year of 944 your battery could be mounted in the scuttle or the boot. There are a few options, the easiest is to take a positive feed off the alternator terminal as its fairly close to the front of the car. You can also extend the positive feed back to the battery.

I used the left hand feed for the switching feed for the relays and connected the positive feed to the alternator. The left hand side of the car has a nice space for the relays and a good earth feed. On the right side I used the head light metal frame for the earth, however, the left side the frame is not earthed? I did not have the issue with the "dim dip" on my 1989 944 S2 that some owner have reported, I think that was mainly on the earlier models.

Common ground and fuse for alternator positive feed

Relays tucked away in the front corner 

Cleaned up the thread on the motorised head light adjustment and added some grease to help it run smoother. 

Ran the positive the wire to the alternator and inside the rear cover via the rubber sliding  cover on top for the feed back to the battery.  Replaced alternator cooling ducting as it had perished. 

This piece of work took much longer than expected due to the how tight the wiring is and the fact that the pops pull the cables and the is wiring exposed to a certain amount rain water when popped up so all the positive connections need to tucked away or insulated. 

One fitted my pop up lights and bumper lights behaviour was, I think matching the standard setup, but because it so Porsche weird I wasn't sure. They now operated as described below: 

** Sidelights on **

Pods down and 5w bulbs on within bumper units. 

** Dipped beam **

Pods up and headlights within pods on, plus  5w bulbs sidelightb on within bumper unit and headlight in bumper unit on

** High beam **

pods up and headlight plus high beam on in pods, 5w bulbs slidenlight on within bumper unit + headlight plus high beams within bumper unit. 

Switching from dipped beam to sidelights leaves pods up, with no lights on in pods. Pods will only come down if switch light is completely off. So flash is a bit weird. 

** Flash **

At the moment. 

If pods are down, the flash happens in the bumper units only and the pods stay down.

If pods are up and dipped beam is on, flash happens in bumper unit and not the pods. 

If pods are up and dipped beam is off and side lights are on flash happens in bumper unit and 

the pop ups. 

*** high beam (not flash) ***

If pods are down, nothing happens 

If pods are up and dipped beam is on, high beam comes on in bumper and pods. 

If pods are up and dipped beam is off and side lights are on high beam come on in pods and bumper. 

There is also fog light blubs in the bumper which come via a foglight switch on the dash but that does not change the way the Pods, side lights, main beam and high beam lighting works. 

Or does it 😱