I have a WE 10-button Trimline phone that the bell does not ring nor the handset will light up. Interestingly, to me anyway, there are five wires to the phone, the usual red, green, yellow, back, plus a white one. To test the light, I hooked up the yellow and black to the power supply, and red and green to tip and ring. Does the white wire have something to do with the ringer or lighted dial that I don't know about? Any help will be appreciated. Thanks.
