Rear running lights quit working.checked all fuses and relays all seem to be good ??? all other lights on the cab including head lights work?? Turn signals in rear work also including brake lights but no running lights???

tell good and bad, not just bad things.!
car starts and runs and drives ok? day time?
dash dimmer turned down, kids played with dads car?
well tail lamps dead (really are up to 10 or more parking lamps dead, is blow fuse or BCM failures.
why not scan the PCM see DTC errors first. save tons of work , if DTCs are there.
cars have 2 or more fuse boxes. cab and bay(engine)
did you check them all?
if car drives, I will say why parks fails. front and rear and sides of cars. are park lamps as are license plate lamps.
the BCM body brain on this car is SJB smart junction box.
SJB Fuse F2 and F3 good
and the HL switch not bad, and park switch there good
the SJB has CPU brain and a park relay
if the CPU sees park turned on it closes the park relay in SJB
there 8 park lamps.all 8 lamps run off fuse F3
so if one lamp works, then F3 is good if all 8 are dead F3 is blown
or the relay is bad.

these words assumes car runs. (engine runs)
and the battery is not dead
nor battery at 10vdc or less.
I check all that and all is covered in the service manual I just read.
for you.

relays, wiring loom cut, if wired to alarm check the socket or bridge the connector to bypass, lastly there is a control unit if it's wet, it's not gonna work.

the FSM book covers this.
as does alldata.com, (USA cars)
checked fuses yet?
turn/back fuse.
feeds the.:
turnback relay & answer back relay (module)
a digital switch in the lever (combo) it just sends ground logic
level to the module.
so sound to me to be
one light is shorted. (or trailer wire hacks) "visual inspections!,"
or the module is bad.
if both sides are bad, seems bad module to me,
if all lights blink fully bright on hazard the lights should be good.

the module is just under the steering wheel , under those
plastic covers, the books shows simple access. to the combo
my book dont show module location
i use a rubber hose to my ear to find any relay, clicks.
if you find hazard click , (assuming it does) then same place
is the turn sigs.
its not in the fuse box, cab , i looked.


hope that helps.

alldata.com
has it.

I've worked on these the first drove me crazy. its the turn signal switch every thing runs thru these. head lights, turn signal, brakes. except the third brake light. it runs directly from the brake switch. go figuare

There are a few fuses for the trailer tow adapter.

1st, is theodd location on the 97-98, engine mini fuse panel has a 20 A fuse forthe stop / turn lamps. Have seen it covered in tape from the factory onsome 97-98 MY trucks.
This is on page 142 in the owners 1997 manual, all the revisions for the 1998 owners manual I have seen do not include this fuse box for some reason.

Download a PDF version from Ford, for the 1997 MY at :

https://www.fleet.ford.com/maintenance/owners_manuals/default.asp

This is a picture of the Power Distribution Box, additional relay box and engine mini fuse panel with the covers off. The 20A in the upper right panel with the red base, is the trailer stop/turn fuse.


The others :
1. Power Distribution Panel / engine compartment fuse panel
Fuse #1 - Trailer tow back-up and tail lamps
Fuse #16 - Trailer tow battery charge and stop/turn lamps
Fuse #28 - Trailer tow electronic brake

2. Instrument Panel Fuses ( cab fuse panel by hood release )
#23 - trailer tow battery charge relay

Check for head light (daytime)relay to be bad,this might have to do with the turn signals also,if the turn signals on this car,also have running lights in them,If this relay is not bad,replace the body control module.

VT8237R CHIPSET DRIVER I NEED IT PLEASE HELP ME

turn off and on head lights liston for click under hood by your battery, that clicks your tail light relay. It has 4 wires in it. with head lights on 3 wires should be hot. if only 2 wires are hot replace relay.

Please use this link:

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800c4326


Good luck..

they are seperate fuses and also has trailer light relay for tow package models , look for trailer light relay fuse , with key on check them all while your there , if fuse is good , swap with another relay , if that will not work , check bulb housing for melted terminals , lastly have body control module ckecked