m_thompson
Well-Known Member
I just repaired the pop-up headlights in a friend's '89 930 slant nose. Apparently they only built 160 of these for the US market, and decided that it wasn't worth the effort to make schematics or any other documentation for adjusting the popup headlight mechanism. The documentation that I could find was for an '88 or earlier and was different, or was just incorrect. Some of the headlight parts are the same as a 944, but the wiring is different.
I had to disassemble the modified windshield wiper motor used for the headlights, reverse engineer the modifications so I could understand how it should work, make lots of fiddly adjustments to up and down limit stops, three different linkage rods, and the motor position. It was a really painful process and made working on a CS seem really simple. I eventually got everything adjusted and it worked OK when I jumpered the up/down signals to the motor. The headlights would go up when the lights were turned on, but would not go down, and the headlights didn't work. Just to make it more interesting the wire harness to the right tail light got melted by hot exhaust, shorted, and blew three fuses.
Porsche, at least on this model, has connectors wherever a harness goes through a bulkhead. Unplugging the right rear harness at the bulkhead in the engine compartment let me replace the fuses with ones that my CS donated from its tool kit. After removing the headlight switch and checking the hundreds of wires plugged onto the back, I eventually found that the harness from the high/low beam switch was not fully seated into the bulkhead connector. Finally the headlights worked like they were supposed to.
The next project is to reinstall the A/C compressor, replace the receiver/dryer, and see if I can get the A/C to work. This thing has an A/C condenser in the whale-tail and another one in the nose. At least the A/C is the same as a 911 so there is some documentation available.
My wife's 328xi wagon is in the background for some BMW content.
I had to disassemble the modified windshield wiper motor used for the headlights, reverse engineer the modifications so I could understand how it should work, make lots of fiddly adjustments to up and down limit stops, three different linkage rods, and the motor position. It was a really painful process and made working on a CS seem really simple. I eventually got everything adjusted and it worked OK when I jumpered the up/down signals to the motor. The headlights would go up when the lights were turned on, but would not go down, and the headlights didn't work. Just to make it more interesting the wire harness to the right tail light got melted by hot exhaust, shorted, and blew three fuses.
Porsche, at least on this model, has connectors wherever a harness goes through a bulkhead. Unplugging the right rear harness at the bulkhead in the engine compartment let me replace the fuses with ones that my CS donated from its tool kit. After removing the headlight switch and checking the hundreds of wires plugged onto the back, I eventually found that the harness from the high/low beam switch was not fully seated into the bulkhead connector. Finally the headlights worked like they were supposed to.
The next project is to reinstall the A/C compressor, replace the receiver/dryer, and see if I can get the A/C to work. This thing has an A/C condenser in the whale-tail and another one in the nose. At least the A/C is the same as a 911 so there is some documentation available.
My wife's 328xi wagon is in the background for some BMW content.
