Originally Posted by 97Dakota4x4
I just brought a new headlight switch cause was having issues with the taillights,parking lights, and driving lights not working, Well the main headlights comes on now. But we don't have any tail lights or parking lights. I am puzzled by this. all the lights inside the truck works.. So i have no clue whats going on, we have checked the fuses, new switch. what could it be?
Assuming you can read an automotive electrical wiring diagram on the
1998 Dakota Haynes Manual..(chapter 12 page 40->43) 1 to 4 pages front exterior lighting
and (chap 12 page44-> 49) 1 of 6 rear exterior lighting
Front exterior wiring
In the PDC (power distribution center) the black box with the removable
cover next to the battery there is..
40amp fuse that feeds a circuit breaker in the headlamp switch
and the o/p of the headlamp switch goes to the multifunction
(steering column stalk switch which is part of the turn signals)
The o/p of the multifunction switch (high/low beam) goes to the
left and right headlamp.
There is also a 15amp fuse that feeds the headlamp relay which feeds 12v to the high beams.
The high beam, low beam and headlamp relay coil are controlled by
the "flash to pass" function of the multi-function switch (stalk) on
the steering column.
The high beam function from the multi-function switch also controls
the fog lamp relay located in the PDC. and the daytime running lamp
module and the instrument cluster "high beam" indicator.
However, there is another fuse in the junction block (the fuse
access panel on the drivers side of the dash
Fuse 14 (15amp)
also provides 12v to the park/dome/cargo area lamps
and this feed
goes through a rheostat (dimmer) and feeds the fog lamp switch through
a separate fuse 5 (5amp)
which is also in that junction block.
The headlamp switch
also provides 12v to joint connector #2 (PDC)
which feeds the left and right park/turn signals and side marker lamps
Now, the rear exterior lighting wiring:
Fuse 2 in the junction block (15amp)
feeds the daytime running lamps module
and the backup lamps switch and the left and right backup lamp.
Fuse 14 (20amp) in the junction block
feeds the headlamp switch which feeds the trailer tow relay (PDC) and routes through joint connector 1 and 2
to splice S316, to feed Left and right TAIL LIGHTS, and right/left licence lamps.
The multi function switch (steering column stalk) feeds the o/p from the
hazard flasher relay (located in the junction block/fuse panel) and turn
to the left and right rear turn signal lamp filaments.
It's hard to describe a complex wiring diagram in words, but at least from the
fusing point of view, you can check if a blown fuse not yet checked, still exists and may be the cause.
You mentioned that you replaced the headlight switch. What was wrong with
it requiring it to be replaced? You mentioned above that the parking lights,tail
lights and driving lights were not coming on BEFORE you replaced the headlamp switch.
Did the headlamps also not come on BEFORE you replaced the
or were the headlamp coming on, but the other lights mentioned were NOT coming on..
which prompted you to replace the headlight switch.