Thankyou for feedback Greg. It would seem to make sense to connect the two black wires and the two white wires in the elimination of switch but for some reason One white wire was connected to a black wire and the other black and white wire were going to the switch. The one set of black and white connected together were not connected to anything else. I would think if this was original equipment on a 73 Vega black would be considered ground.. The reason for 4 wires are the 2 dome lights I am trying to replace. The switch looks original so the wiring should be a no brainer. The problem is sometimes I dont think I have a brain ! 2white wires and 2 black wires (all original) going to one switch operating two dome lights. Should be simple, RIGHT !!?? Thanks for help any other suggestions would be appreciated. Pat
bluenorth50 bluenorth50@... wrote: The light switch is probably only SPST (Single Pole Single Through)
this would mean that only 2 wires are connected to the switch,
therefore, 2 wires are already connected (probably blacks).
Remove the fuse for this circuit first and test for voltage to ensure
the circuit is not live.
Remove the switch, connect the 2 wires that were connected to the
switch.
Install the light with light bulb.
I would recommend testing the circuit before energizing though, to do
this disconnect the white and black wire at the electrical panel,
test for DC voltage, then connect your ohm meter to the wires and
operate the switch on the new light, you should see the ohm meter
switch from "open circuit" to an ohm value.
If you don't see the ohm value change you will need to investigate
further before energizing the circuit. (Note, the ohm meter will be
testing the wires, through the switch and light bulb).
If you see the switching action then insert the fuse and test the
light.
Regards,
Greg
