Headlights refuse to retract, 1974 car with headlights that refuse to retract Options

[Jezibel]

Main lighting switch raises lamps, lights up, but pushing switch back in fails to lower the lights.

AI says 1) Check fuses for failed or faulty fuse; 2) check headlight relay on fuse-box backside; 3) check grounds; 4) check headlights switch for possible corrosion on contacts.

System was working fine last week. It just decided today to not lower the lamps.

I have a replacement main lighting switch on order, also several Bosch 5-pin relays, and all the fuses check out OK (no corrosion on fuse block contacts.

I lowered the headlights manually, using the motor-end knobs, per the protocol, but it irritates me to not be able to immediately fix this apparently quite common problem on my '74 1.8 liter.

Any helpful suggestions, other than the cited "4-most likely causes' AI pointed out, above?

Thanks in advance.

[L-Jet914]

The relays for each headlight motor is mounted underneath the plastic covers below each headlight motor. See image for location which I pulled from another thread here on 914World. Take what AI says with a grain of salt as it's not always correct. It's be to browse the forums here for answers to your questions. Bosch 5 pin relays will not fit in the locations of where the factory round relays reside without modifications to the factory wiring harness. You can still get the 5 pin round relays new from multiple vendors. Also attached is the under dash relay board layout from Jeff Bowlsby.

(IMG:http://bowlsby.net/914/Classic/zTN_Elect_Relays_MainFusepanel.jpg)