Chrysler Conquest 1988 Service Manual page 189

LIGHTING SYSTEM
- Troubleshooting
8-177
OPERATION
NOSIHIA
TROUBLESHOOTING HINTS
By setting the lighting switch at the "2" position
when the ignition switch is at the "ACC" or
"ON" position, the headlight relay contacts
close. Refer to OPERATION for the headlights.
If the fog light switch is set at the "ON" position
when the dimmer switch is at the "low"
position, ~current flows through the headlight
relay (contacts), fog light relay (coil), fog light
switch, diode, dimmer switch, and ground,
causing the fog light relay contacts to close.
Once the fog light relay contacts have closed,
current flows through the dedicated fuse, fog
light relay (contacts), fog lights, and ground,
causing the fog lights to go on.
1. Only the right or left fog lights go on
l
Check the bulb.
2. Fog lights do not go on when the passing switch
is set at "ON".
l
Check the diode.
If the passing switch is set at the "ON" position
while the fog lights are illuminated, the headlight
relay contacts close. Refer to OPERATION of
the headlights.
After flowing through the closed contacts of the
headlight relay, current flows through the fog
light relay (coil), fog light switch, diode, passing
switch, and ground, causing the fog light relay
contacts to close, which turns on the fog lights.