Just installed my OHC (from a 98 Explorer into a 2005 Ranger). Followed the write-ups I've seen posted here about the wiring changes for 04-06. Only my dome & OHC lights work, nothing else. No read out of any sort on the temp & directions. Yet, when I bench test the unit, everything works. Any ideas where I can start?
Here's the wiring I used:
2004 & Newer Ranger Differences:
There are a few differences for 2004+:

Console Power (Explorer Yellow/Gray at console): 2003 and older Ranger's use the Yellow/Black wire at the radio harness. 2004 and newer Ranger's use the Black/Pink wire at the radio harness.

Speed Sensor Input (Explorer Gray/Black at console): 2003 and older Ranger's use the Gray/Black wire at the GEM. 2004 and newer Ranger's use the Gray/Black wire at the Smart Junction Box (brown connector).

Map Light Power (Explorer Lt. Green/Orange at console): 2003 and older Ranger's use the Lt. Green/Orange wire at the dome light. 2004 and newer Ranger's use the Lt. Green/Orange wire at the dimmer module.

Black (BK) - ground (mounted to the mounting bracket)
Yellow/Gray (YE/GY) - console electronics power (goes behind the radio) 2004 and newer Ranger's use the Black/Pink wire at the radio harness

Blue/Red (BL/RD) - console display dimmer input (goes behind the radio)
Green/Orange(GN/OR) - Map light power (goes to the dome light) 2004 and newer Ranger's use the Lt. Green/Orange wire at the dimmer module.

Black/Blue(BK/BL) - Dome light power (goes to the dome light)
Lt. Blue/White (BL/WH) - Temp sensor (front of the truck)

Lt. Blue/Yellow (BL/YE) - Temp sensor (front of the truck)

Gray/Black (GY/BK) - speed sensor (not used by some, but necessary) (goes behind the radio.
then i ran the yellow/gray, blue/red, and gray/black wires through the headliner. 2004 and newer Ranger's use the Gray/Black wire at the Smart Junction Box (brown connector).

 

Have you checked and rechecked all of your connections? Sounds like to me the Console Power wire is the problem. That would cause it. Especially since the Dome lights work. That means you def. have a ground. LOL.

 

i would test to see if you have power at the plug. if you do, the lcd may be bad. i ran into that this past weekend with mine. i had a 2nd one laying around, so i was able to use it as a test.

did you try hitting mode to see if it was just off?

 

He said he bench tested it though, and all was good.. Unless, you haven't tested it since you tried it out in the truck.

 

Guys, I bench tested the OHC with the wiring harness connected, the display and lights worked fine. Installed it, wired it, only the lamps worked, nothing else, Took it back out and retested the unit only (no wiring harness) and it worked again. Put it back into my truck and same results, only the lamps work. I've checked & rechecked wires. I'll have to run tests on every wire to make sure the pin connector is not wired wrong. Thanks for all the suggestions, keep'em coming!

 

just to make sure, this may be crazy to ask. but you are turning the ignition on right? just had to ask. lol. that would prevent it from working. it just sounds to me like the power wire for the Console is messed up or something.. especially if it works when you test it...

 

benjamwhit51, I did forget it the first time and wondered....duh? Even with the key on or truck running same results. BTW, when I bench tested the OHC, I connected +12vdc to the Gray/Yellow pin in the connector and grounded the ground pin in the connector directly in the OHC thus eliminating the wiring harness. The lights worked, although could not turn them off, and the display lit up with -40F NW. Could I possibly have the wrong power in pin???

 

maybe.. and that sounds like if it displayed the -40NW that it's normal. it display's that when the temp sens. isn't hooked up.

 

I had the temp sensor unhooked at first, but then wired it simply in the cab. I get a day off work tomorrow so I'll be tracking every wire. It does sounds logical that it works on the bench but not in the truck. Go figure! Thanks for the help.

 

no problem buddy. keep us updated! wish I could be of more help, but i'd really have to see it. luckily mine went in with no issuses. lol. good luck man!

 

Well, when all goes wrong, start over! This will really make you laugh. I replaced my radio a few months ago with an Alpine unit. It came with a new pigtail that hooked into my existing harness. What I finally realized is that the color of the wires I was looking at on the back of the radio were for the pigtail, not the truck! The switched 12vdc source actually is a red wire and not pink/black. Switched the 2 and , whalla, everything works. Now I just have to calibrate the compass and permanent mount the temp sensor. Thanks to all for the advice. Feel like a dumb A**!

 

Bahahahaha!! Thats just great! Well at least you've got it all worked out bud! Glad to have attempted to help lol.

 

If you don't mind, I have one more question. I got everything hooked up & working except one wire, a gray/black from the OHC to Speed Sensor Input. Again,this is what I been following:Speed Sensor Input (Explorer Gray/Black at console): 2003 and older Ranger's use the Gray/Black wire at the GEM. 2004 and newer Ranger's use the Gray/Black wire at the Smart Junction Box (brown connector). On my 2005, I found the fuse panel & connectors on the pass side kick panel but which brown connector (there are 3 large ones) or which wire is my speed sensor input? My temp changes but in relative little increments which might be ok so I figured this last wire might be the difference. Thanks for all your help on this.

 

oh, it's no problem buddy. the wire that your looking for is connected to the box that runs vertical on the passenger side kick panel. it's the only box of 4 on that side that is at a different angle than the others. it's closet to the front of the truck. the shell of it is dark brown. hope that helps.. lol. your going to have to remove all the plastic guard that covers that side of the floor board. lemme know if you figure it out. i'd take a picture of it, but i've only got my cell phone right now so..