Hi All, Have scanned the forum for solutions to my headlight problems. After reading all the posts, following their instructions, seems they were right. The diodes are blown on the motors. Next question is "does anyone know what value the diodes are?" All help greatly appreciated Cheers Niall PS a few pics to get some interest Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
Use 1N4001 diodes or equiv. 1Amp forward current - 50Volts peak inverse voltage - diode characteristics are NOT critical. The 1N400x series are all 1A. but the last number is PIV. Bigger numbers mean higher PIV and lower reliability - 1N4002=100V is OK. Going overboard -1N4007=1000v is not. A set of contacts w/diodes at the lift motor detects when the headlight lift assembly is fully up or fully down. If not, contacts sends this low level information to a related relay coil which sends voltage to the headlight motor. The diodes allow some common wires to be used while isolating one side from the other. The only current involved is very low relay coil current. These diodes rarely go bad as this circuit which places low demand on the diodes. For any of them to go bad relates more to the vibration environment than the electrical environment. If one does go bad, there is no reason to replace any others. Virtually all Ferrari movable headlights in from 1970 to2000 use this same circuit and components. ____________________________ http://www.ferrari308gtbi.com/
Thanks Edwardo, Paul. Exactly the info I was looking for, should be popping up & down soon. I'll let you know how I get on Thanks again Niall
