4-Wheel Drive Light

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MOPARManiac
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4-Wheel Drive Light

Post by MOPARManiac » Mon Apr 04, 2016 8:44 pm

Riddle me this Bat Man. I wanted to check my lockers out today after changing diff fluids/cleaning the magnets over the weekend. Everything worked fine until I went back to 2-Wheel Drive. Now when I am shifted in 2 Wheel Drive the light says I am in 4 HI, when I shift to 4-Hi the light goes off. When I am in Neutral the light says I am in 4-Low and when I am in 4-Low that is the only time the light is correct and says I am in 4-Low. The Service 4-Wheel Drive light also came on. I disconnected the battery and that went off but the 4-Wheel Drive lights are still wrong.

I don't think it is the smartbar because the lockers/sway bar are working correctly.

Any ideas?
2010 Power Wagon in Bright Silver Metalic, Sun Roof, Power sliding rear window, Nav, Luverne Grill Guard. Cooper S/T Maxx tires, DeeZee toolbox w/ Hi Lift Jack, two Jerry Cans/Mounts, Armacoating bedliner, Carli front diff guard. White Knuckle Off Road Sliders.

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Re: 4-Wheel Drive Light

Post by nts007 » Mon Apr 04, 2016 8:52 pm

T case position sensor buggy? It's what gives the resistance reading to the comp. it could be buggered. Easy to change. I don't know how to test it though aside from moving the tcase position and using a multi meter to directly read off the sensor
08 ctd--mini max--thuren 3" coils and LT Leaves--4.56 gears and lockers in pw axles--some lights--afe intake system--bd super b turbo--Banks w/m Injection--Dynatrac Balljoints--king 2.5"s--37" Hankook Dynapro MT--DOR Long arms--Custom emf track bar--Manual T-case swap--Full PW Under armor--PSC Hydro Assist and so much more

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Re: 4-Wheel Drive Light

Post by waldo » Mon Apr 04, 2016 8:54 pm

Yeah, T case position indicator most likely.
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Re: 4-Wheel Drive Light

Post by MOPARManiac » Mon Apr 04, 2016 8:58 pm

That's what I was wondering, is this located under the leather boot on the shifter or is it on the T-Case?

Thanks for the quick replies.
2010 Power Wagon in Bright Silver Metalic, Sun Roof, Power sliding rear window, Nav, Luverne Grill Guard. Cooper S/T Maxx tires, DeeZee toolbox w/ Hi Lift Jack, two Jerry Cans/Mounts, Armacoating bedliner, Carli front diff guard. White Knuckle Off Road Sliders.

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Re: 4-Wheel Drive Light

Post by RustyPW » Mon Apr 04, 2016 9:06 pm

You have to get to it from under the PW. It's located by the linkage.
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Re: 4-Wheel Drive Light

Post by MOPARManiac » Mon Apr 04, 2016 9:07 pm

RustyPW wrote:You have to get to it from under the PW. It's located by the linkage.
Awesome, thanks I'll go take a look. I'm wondering if my linkage is maybe out of adjustment. I have to be in neutral to shift into 4 low.
2010 Power Wagon in Bright Silver Metalic, Sun Roof, Power sliding rear window, Nav, Luverne Grill Guard. Cooper S/T Maxx tires, DeeZee toolbox w/ Hi Lift Jack, two Jerry Cans/Mounts, Armacoating bedliner, Carli front diff guard. White Knuckle Off Road Sliders.

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Re: 4-Wheel Drive Light

Post by MOPARManiac » Mon Apr 04, 2016 9:51 pm

I went out, took the electrical connector off, unscrewed it, sprayed it down with brake cleaner and depressed the plunger several times, put it on and it works like it's supposed to. Crazy little electrical gremlin I guess.

Thanks for the advice, that's what I really like about this forum.
2010 Power Wagon in Bright Silver Metalic, Sun Roof, Power sliding rear window, Nav, Luverne Grill Guard. Cooper S/T Maxx tires, DeeZee toolbox w/ Hi Lift Jack, two Jerry Cans/Mounts, Armacoating bedliner, Carli front diff guard. White Knuckle Off Road Sliders.

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Re: 4-Wheel Drive Light

Post by coder » Mon Apr 04, 2016 9:56 pm

Here's a thread on the t-case position sensor everything you need to do the job:

http://forum.powerwagonregistry.org/vie ... sor#p41845
Vehicle: 2007 Power Wagon Quad Cab - Factory Options (Inferno Red, Premium Cloth Bench Seat, Light Group, Automatic Transmission, Leather Steering Wheel)
Suspension: Carli 3" Hemi Coils, Carli Control Arms, Carli King 2.5 Pin-Tops, Carli Stainless Steering Stabilizer, Carli Trackbar | Synergy 1" Rear Shackle
Performance: Magnaflow Muffler | Magnaflow Y-Pipe
Wheels/Tires: Yokohama X-A/T 35x12.5x17
Steering/Drivetrain/Axles: Carli Front Diff Guard | Dynatrac Ball Joints | Mopar HD Steering Gear
Miscellaneous: Line-X Bedliner | Locker Bypass Switch | Mopar Rock Rails | Odyssey Extreme 65-PC1750T | Performance Friction Brake Pads | Weathertech Digital Fit Mats | Winch Thermal Protection Bypass

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Re: 4-Wheel Drive Light

Post by MOPARManiac » Mon Apr 04, 2016 10:05 pm

coder wrote:Here's a thread on the t-case position sensor everything you need to do the job:

http://forum.powerwagonregistry.org/vie ... sor#p41845
I remember reading that thread now, I was desperately searching for it and couldn't find it so started this thread. It is bookmarked, fortunately it doesn't look like I will have to replace it right now. It must have just got binded up and through a fit. All I did was go from the shop to the house around a 100 yards. Damn thing anyway.
2010 Power Wagon in Bright Silver Metalic, Sun Roof, Power sliding rear window, Nav, Luverne Grill Guard. Cooper S/T Maxx tires, DeeZee toolbox w/ Hi Lift Jack, two Jerry Cans/Mounts, Armacoating bedliner, Carli front diff guard. White Knuckle Off Road Sliders.

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Re: 4-Wheel Drive Light

Post by RustyPW » Mon Apr 04, 2016 10:11 pm

A little tip. Put dielectrical grease inside the plug. Help seals out the water.
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Re: 4-Wheel Drive Light

Post by Mule » Tue Apr 05, 2016 1:15 am

Mine did the same till it shit out completely and the 4WD light just stayed on. It's the T-case position sensor.

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Re: 4-Wheel Drive Light

Post by MOPARManiac » Tue Apr 05, 2016 9:56 pm

Yep, that's it. It worked fine yet today so hopefully I get some mileage out of it before I have to replace it.
2010 Power Wagon in Bright Silver Metalic, Sun Roof, Power sliding rear window, Nav, Luverne Grill Guard. Cooper S/T Maxx tires, DeeZee toolbox w/ Hi Lift Jack, two Jerry Cans/Mounts, Armacoating bedliner, Carli front diff guard. White Knuckle Off Road Sliders.

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Re: 4-Wheel Drive Light

Post by nts007 » Tue Apr 05, 2016 9:58 pm

Awesome to hear. I remember at one point a few guys were having problems with the sensor and then there was nobody having issues for quite some time. At least nobody was popping up.
08 ctd--mini max--thuren 3" coils and LT Leaves--4.56 gears and lockers in pw axles--some lights--afe intake system--bd super b turbo--Banks w/m Injection--Dynatrac Balljoints--king 2.5"s--37" Hankook Dynapro MT--DOR Long arms--Custom emf track bar--Manual T-case swap--Full PW Under armor--PSC Hydro Assist and so much more

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Re: 4-Wheel Drive Light

Post by MOPARManiac » Thu Oct 05, 2017 7:17 pm

Word of advice.......when you have a problem with the Transfer Case position sensor go ahead and just change it. That or you can be on top of a mountain deer hunting a year and a half later and it completely dies. When it dies it also doesn't allow the smart bar to work and I was unable to engage the lockers when I really, really needed them.
2010 Power Wagon in Bright Silver Metalic, Sun Roof, Power sliding rear window, Nav, Luverne Grill Guard. Cooper S/T Maxx tires, DeeZee toolbox w/ Hi Lift Jack, two Jerry Cans/Mounts, Armacoating bedliner, Carli front diff guard. White Knuckle Off Road Sliders.

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Re: 4-Wheel Drive Light

Post by coder » Thu Oct 05, 2017 7:35 pm

waldo wrote:Yeah, T case position indicator most likely.
x2 that what it is...
Vehicle: 2007 Power Wagon Quad Cab - Factory Options (Inferno Red, Premium Cloth Bench Seat, Light Group, Automatic Transmission, Leather Steering Wheel)
Suspension: Carli 3" Hemi Coils, Carli Control Arms, Carli King 2.5 Pin-Tops, Carli Stainless Steering Stabilizer, Carli Trackbar | Synergy 1" Rear Shackle
Performance: Magnaflow Muffler | Magnaflow Y-Pipe
Wheels/Tires: Yokohama X-A/T 35x12.5x17
Steering/Drivetrain/Axles: Carli Front Diff Guard | Dynatrac Ball Joints | Mopar HD Steering Gear
Miscellaneous: Line-X Bedliner | Locker Bypass Switch | Mopar Rock Rails | Odyssey Extreme 65-PC1750T | Performance Friction Brake Pads | Weathertech Digital Fit Mats | Winch Thermal Protection Bypass

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Re: 4-Wheel Drive Light

Post by Retired BLM Rig » Sun Oct 08, 2017 12:32 am

MOPARManiac wrote:
Thu Oct 05, 2017 7:17 pm
Word of advice.......when you have a problem with the Transfer Case position sensor go ahead and just change it. That or you can be on top of a mountain deer hunting a year and a half later and it completely dies. When it dies it also doesn't allow the smart bar to work and I was unable to engage the lockers when I really, really needed them.
One of the benefits of a locker bypass is TCPS override, so when the sensor goes belly up you can still get the lockers to work.
Glad you lived to tell about it! :rockon:

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Re: 4-Wheel Drive Light

Post by Ducky's Dad » Sun Oct 08, 2017 12:47 pm

New sensor is about $84 from the dealer. My 4WD light stuck on last time I used the lockers, so I have a new sensor riding around with me until I can get around to changing it.

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Re: 4-Wheel Drive Light

Post by MOPARManiac » Wed Oct 11, 2017 10:38 pm

Retired BLM Rig wrote:
Sun Oct 08, 2017 12:32 am
MOPARManiac wrote:
Thu Oct 05, 2017 7:17 pm
Word of advice.......when you have a problem with the Transfer Case position sensor go ahead and just change it. That or you can be on top of a mountain deer hunting a year and a half later and it completely dies. When it dies it also doesn't allow the smart bar to work and I was unable to engage the lockers when I really, really needed them.
One of the benefits of a locker bypass is TCPS override, so when the sensor goes belly up you can still get the lockers to work.
Glad you lived to tell about it! :rockon:
Anyone building the locker bypass so I can buy one?
2010 Power Wagon in Bright Silver Metalic, Sun Roof, Power sliding rear window, Nav, Luverne Grill Guard. Cooper S/T Maxx tires, DeeZee toolbox w/ Hi Lift Jack, two Jerry Cans/Mounts, Armacoating bedliner, Carli front diff guard. White Knuckle Off Road Sliders.


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Re: 4-Wheel Drive Light

Post by GunniPWguy » Tue Oct 24, 2017 2:12 pm

Well this is a timely thread! I Just experienced the same exact scenario as MOPARmaniac. I disconnected my locker bypass and went back to stock to see if it was that. Nope. I will have to get back under there and replace the TCPS so I can hook my locker bypass back up and get rid of the 4wd light in 2wd feature. Thanks for the info as always! You guys rule!
2005 Black Pow Wagon mods: DT Profab Steering Brace, Gibson superflow catback single exhaust system, Locker Bypass, Moog ball joints (see how long they last), New OEM track bar bushings, T-steering upgrade w/ Bilstein 5100 steering damper, Power everything, Heated leather seats, (keeps the better half happy), Rear window defrost, Bilstein 5100 shocks, 35x12.5x17 Toyo AT2 Extremes, Customized H2 alloy wheels, Original rock rails with family friendly steps welded on, Tri fold tonneau, Hi-lift extreme jack, Tool box along with all the essential PW gear. New winch cable, Winch TPS bypass, Cardan joint grease zerk discovery. New front grille assembly. Magnesium Chloride under coating.

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