Where can you find a wiring diagram for the fog lamp switch on a 1991 Nissan Pathfiner?
Normally the fog lamp switch (illuminated) has 3 leads: power, accessory, and ground.
[b]Power[/b] is connected to existing power when ignition is "on" or "accessory"
[b]Accessory[/b] goes to the relay (86)
[b]Ground[/b]... goes to a ground.
A non-illuminated switch won't have a ground.
The relay consists of:
(86) - switch
(85) - ground to chassis
(30) - main power to battery (15 or 20 amp fused)
(87) (one or 2) - power to lamps
Hope that helps.