2000 ranger 3.0 swapped in by previous owner. truck is a 5 speed manual. currently have the following issues and i need some help from the experts..

no reverse lights.. switch has continuity when the dentent is pressed in while testing with a multi-meter. wiring to switch gets 12 volts. but no voltage detected at body to tail light harness for reverse when plug at switch is jumped. connection is clean, no corrosion. new bulbs for reverse as well.

no dome lights or bed lights. bulbs light up when tested with 12v. i did notice that i have a spare GEM module (was in cab when i bought truck, has a GEM installed behind radio.
as for the dome lights, i dont feel a bump when rotating dimmer switch to upper most position, so im thinking that may be the culprit.

wiper motor inop ( gets 12 volts, relays test good) looks to be stock motor, figuring thats bad. as for the multifuncton switch, high beams, turn signals all work.

if someone would take the time to

 

Reverse light switch on trans should have a purple/orange wire with 12volts key on
Then a Black/pink wire OUT to reverse lights, black/pink all the way to the bulbs

May need to run a new Black/pink wire to the rear
Check previous attempts to add trailer wires in the rear, seen some real butcher jobs back there, lol

Fuse 26 in cab fuse box powers interior light AND GEM, check it
Door open dome on and dimmer wheel dome on both use fuse 26

There is no direct connection between wiper controls on multi-function switch and wiper motor, the GEM runs the wipers with input from the controls

Both need Battery Saver relay to work

Its in AUX Relay box 1 above gas pedal in the cab, example layout here: https://www.2carpros.com/images/ques...2/original.jpg
It faces Parking brake pedal

Does speedometer work?
If not that's done by the GEM as well

 

@RonD thanks for the reply on this one too. Speedo and odometer both don't workDome lighta dont work and reverse lights dont work. There is a spare gem in the truck when I got it, but how do I tell if a gem is bad? I get 12 volts at wiper motor and at reverse harness to switch Has factory trailer harness installed. Its part of the harness for tail lights.

 

i get 12 volts at this location

stock trailer wiring. its part of the taillight harness

fuse has continuity

cant find aux relay location as described. here is what i do see in that location.


clutch and brake pedal area

gas pedal side under dash

parking brake side

 

Picture here: https://fuseandrelay.com/wp-content/...-relay-box.jpg

There is a cover over it, it has been remove in picture

Found a picture with cover on: https://i243.photobucket.com/albums/...a/P9230006.jpg

But don't see it in your pics?


Most trailer connectors do not have reverse light wires, people just cut them not knowing what they are doing, lol
Reverse lights have no connection to GEM


Wiper motor has 12volts key on from fuse 16, 30amp
It is controlled by GROUNDING the relays in the engine bay fuse box, thats done by the GEM
GEM is "told" what to ground by the wiper control switch

Most vehicle makers control relays by grounding, its safer that running 12volt wires
So they send 12volts to devices and relays on shorter wires, but nothing happens until there is a ground
And if one of the longer ground wires should "short to ground" all that happens is something turns on, no SMOKE, no MELTED WIRES, no blown fuses, just something turns on normally when it should be off

Diagram below is 2001 but same wiring, relays and fuse used 1998 thru 2003, the 2001 diagram is just easier to read, lol

 

Is it possible I dont have an aux relay bank? Could it have been removed? Relocated maybe? I'll take a better look tomorrow but I figured it would be plain as day to see.

 

Yes, its possible
If its a "Fleet" model, bare bones, 0 options, may not have it, it really only needs the turn signal/4-way flasher

Turn on turns signal and find the Flasher unit, if it ain't in the aux relay box then you don't have one, lol

 

@RonD I should also add that this truck has manual windows. I had read on another forum that it is possible to not have a relay box if I don't have power windows?? But if that's the case where is the interior light relay. either way there has to be one culprit for no interior lights, no speedo, no odometer, and no wipers or washer spray. Thoughts? I can video chat if you have Facebook or Google meet etc.

 

@RonD well, after seeing one of your posts to another member regarding reverse lights being inop, this morning i checked for continuity while the switch was in the transmission and it was in reverse, i wasnt able to test the switch on the terminals together due to lack of clearance for the multimeter probes, so i put some inline wire t's on each wire and noticed that i only got continuity one of the wires. this leads me to think the wire harness plug may have an issue. i am picking up a new one today got 15 bucks and will report back on that front later this evening.

 

@RonD ok, so the spare GEM in the truck has a frist 3 digits of XL2. plugging this one in gave me interior dome and map lights, but lights dont come on when driver door is open or when dimmer switch is in full up position. i have a new open box dimmer on order. i have working wipers, so will have to cancel wiper motor order, however part of me wants to just replace it since it is probably the stock motor. i still dont have speedometer working, but waiting on speed sensor for that.also, are the bed lights supposed to light up when a door is open? when i open passenger door, i get dome light, but no bed lights. and since i think the rheostat dimmer switch is bad, im guessing thats why i dont get bed lights when its rotated fully up as well.

can you let me know what options came with the xl2T-14B205-AD gem? or where i can find out

 

XL2 is from a 1999 Windstar Van, which should be fine since it was similar to Rangers wiring and options

Ford uses this Part number sequencing
1999 and up only
First digit is YEAR part was first used, not year of vehicle it was used in, but "computer" type modules tend to have matching year part numbers
Next 2 digits are the Vehicle Model the parts was made for, L5 is Ranger, L2 is Windstar
4th digit is the department at Ford that designed it, T is not assigned but tends to be seen in trucks or vans

Next digits are the class of the part, i.e. what it is, -14B205-, is a Body Computer or Module, nothing to do with Ranger or year, i.e. -12A650- is engine computer, used since 1986 and still used today doesn't matter what model vehicle or year, its engine's computer part number will be -12A650-

Last 1 to 3 digits are Revisions, A or AA would be starting revision, AB 2nd revision, AC 3rd revision, ect
But.........in the case of "computer" type modules, like GEM or engine computers these last digits are also Software codes, tells what software Ford put on it

Ford NEVER released cross references for these, they have them, just never seen any lists like that

So no, I can't tell you what options the AD revision has, in xl2T-14B205-AD, I can tell you its a 1999 Windstar body computer

Look here: https://www.blueovaltrucks.com/tech-...-part-numbers/

Scroll down to 1999+ models, as that's when Ford changed the Format for the first 4 digits

The original GEM in your 2000 Ranger would have been YL5T-14B205-??, if its a Fleet/bare bones Ranger 2WD then ?? would most likely be AA

 

@RonD fixed reverse lights. harness plug to switch had a lose wire. new pigtail fixed it :)