I only have two wires hooked up on my 87 clock and it works fine. I have the bulb wired to the cigarette lighter bulb and the other two wires disconnected. The two disconnected wires go to the light switch and the ignition switch. From this I would assume the constant 12V and ground make the clock work.
__________________
86 n/a
87 951
Previous Porsches
77 911
83 944
86 944
87 911
88 944
92 968
94 964 C2
|