About a week ago, I noticed the rear differential indicator light blinking as I’m driving down the highway. The truck was in 2WD, the diff lock selector was in “unlock” position.
Anyone have any idea what this might mean?
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Blinking Rear Diff Light in 2WD
Blinking Rear Diff Light in 2WD
'08 Flame Red Quadcab with Spyntec & Teraflex hubs, Mag Hytec pan & covers, Carr rock rail steps, Warn wireless winch controller, Hawk Performance brake pads, Ranch Hand crossover box, and Turbolined bed.
- Retired BLM Rig
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- Model Year: 2008
- Location: State of Jefferson
Re: Blinking Rear Diff Light in 2WD
The flashing light is telling you that the final drive control module/smart bar sees a problem in the rear locker system. Check out this thread for more information. viewtopic.php?f=2&t=5132
Also, try cleaning and tightening all of your connections at the Smart bar and the rear locker connectors. Look for any damaged wires or pins and apply dielectric grease to the connections. You can also remove the rear cover to clean the sensor magnet and check the air gap between the magnet and the sensor. If all of that fails you’ll probably be looking at replacing the actuator in the rear axle.
I was able to fix mine by tightening the pin connections at the rear axle connector.
Good luck!
Also, try cleaning and tightening all of your connections at the Smart bar and the rear locker connectors. Look for any damaged wires or pins and apply dielectric grease to the connections. You can also remove the rear cover to clean the sensor magnet and check the air gap between the magnet and the sensor. If all of that fails you’ll probably be looking at replacing the actuator in the rear axle.
I was able to fix mine by tightening the pin connections at the rear axle connector.
Good luck!
2008 Quad Cab - Stock RTI = 655, curb weight = 6081 lbs. Abel Components Plug & Play Locker Bypass®, Abel Components Full SmartBar Bypass®, Abel Components Nanny Kill Switch®, 2000 Watt ProMariner TruePower Plus Pure Sine Wave Inverter, Trailer Hitch Storage, MOLLE Door Panels, Wilton Hitch Vice, Locking Under Seat Storage Drawer, Smittybilt 2781 Air Compressor, 14K PullPal, Hi-Lift First Responder Jack, 25' Jumper Cable System, Slip Yoke Eliminator in a Can, Evolution vs. God, Share the Umbrella, Make sure you're right with God before you meet him!
Re: Blinking Rear Diff Light in 2WD
Cool— thank you very much.Retired BLM Rig wrote:The flashing light is telling you that the final drive control module/smart bar sees a problem in the rear locker system. Check out this thread for more information. viewtopic.php?f=2&t=5132
Also, try cleaning and tightening all of your connections at the Smart bar and the rear locker connectors. Look for any damaged wires or pins and apply dielectric grease to the connections. You can also remove the rear cover to clean the sensor magnet and check the air gap between the magnet and the sensor. If all of that fails you’ll probably be looking at replacing the actuator in the rear axle.
I was able to fix mine by tightening the pin connections at the rear axle connector.
Good luck!
What do you mean by “tightening” pin connections? Bending the contacts on the female side of the plug?
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'08 Flame Red Quadcab with Spyntec & Teraflex hubs, Mag Hytec pan & covers, Carr rock rail steps, Warn wireless winch controller, Hawk Performance brake pads, Ranch Hand crossover box, and Turbolined bed.
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- Model Year: 2008
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Re: Blinking Rear Diff Light in 2WD
I posted this in another thread.
I'm starting to think about my locker issue I had this summer. I have a Rock Crusher diff covers on both front and rear. But they are almost the same shape as the stock covers. The only real difference is that the fill plugs are higher on the Rock Crushers. The issue I was having. On my trip out west. My rear locker light would flash after about a 100 miles of steady state driving at 70 mph, and would stay flashing. The next morning. The same thing. Would have to drive about a hundred miles before it would flash. Haven't done a thing to the diffs since that trip, and my locker light no longer flashes. Haven't driven over 50 miles per trip since then. Everything with them is ok. Everything works as it should. The only thing I did before the trip, was to change the lube in them. Mobil 1 75w90, 3 quarts in the front and 6 quarts in the rear. The same as I first installed the diff covers. Wondering now if my level is too high and causing too much heat. Affecting the locker sensor? Or my rotted tail pipe blowing exhaust on the right side axle tube. Which is fixed now.
I'm starting to think about my locker issue I had this summer. I have a Rock Crusher diff covers on both front and rear. But they are almost the same shape as the stock covers. The only real difference is that the fill plugs are higher on the Rock Crushers. The issue I was having. On my trip out west. My rear locker light would flash after about a 100 miles of steady state driving at 70 mph, and would stay flashing. The next morning. The same thing. Would have to drive about a hundred miles before it would flash. Haven't done a thing to the diffs since that trip, and my locker light no longer flashes. Haven't driven over 50 miles per trip since then. Everything with them is ok. Everything works as it should. The only thing I did before the trip, was to change the lube in them. Mobil 1 75w90, 3 quarts in the front and 6 quarts in the rear. The same as I first installed the diff covers. Wondering now if my level is too high and causing too much heat. Affecting the locker sensor? Or my rotted tail pipe blowing exhaust on the right side axle tube. Which is fixed now.
PWOC #53
2008 POWER WAGON RC
My build thread. http://forum.powerwagonregistry.org/vie ... =13&t=2826
Moab '09, '10, '12, '14.
Rausch Creek - Summer '10, Spring-Fall '11, Spring '12, Summer '13, Summer '14, Summer '15, Summer '16, Summer '17, Summer '18, Summer '20, Summer '22,
AOAA Summer '19.
Russ
NRA - Benefactor, Golden Eagle.
2008 POWER WAGON RC
My build thread. http://forum.powerwagonregistry.org/vie ... =13&t=2826
Moab '09, '10, '12, '14.
Rausch Creek - Summer '10, Spring-Fall '11, Spring '12, Summer '13, Summer '14, Summer '15, Summer '16, Summer '17, Summer '18, Summer '20, Summer '22,
AOAA Summer '19.
Russ
NRA - Benefactor, Golden Eagle.
- Retired BLM Rig
- 1000_Posts
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- Joined: Sun Jan 31, 2016 6:51 pm
- Model Year: 2008
- Location: State of Jefferson
Re: Blinking Rear Diff Light in 2WD
Yes.
2008 Quad Cab - Stock RTI = 655, curb weight = 6081 lbs. Abel Components Plug & Play Locker Bypass®, Abel Components Full SmartBar Bypass®, Abel Components Nanny Kill Switch®, 2000 Watt ProMariner TruePower Plus Pure Sine Wave Inverter, Trailer Hitch Storage, MOLLE Door Panels, Wilton Hitch Vice, Locking Under Seat Storage Drawer, Smittybilt 2781 Air Compressor, 14K PullPal, Hi-Lift First Responder Jack, 25' Jumper Cable System, Slip Yoke Eliminator in a Can, Evolution vs. God, Share the Umbrella, Make sure you're right with God before you meet him!
- Bill2014
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Re: Blinking Rear Diff Light in 2WD
A set of Dentistry Tools comes in handy!
2014 Power Wagon Laramie
Titan V5 2.5" Receiver Pintle Hook
Warn wireless winch controller
.188" DOM White Knuckle Rock Sliders
Locker Bypass & Nanny Kill Switch
Moab 2006
Titan V5 2.5" Receiver Pintle Hook
Warn wireless winch controller
.188" DOM White Knuckle Rock Sliders
Locker Bypass & Nanny Kill Switch
Moab 2006
Re: Blinking Rear Diff Light in 2WD
Got it— thank you. That oughta be fun while lying underneath the truck.
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'08 Flame Red Quadcab with Spyntec & Teraflex hubs, Mag Hytec pan & covers, Carr rock rail steps, Warn wireless winch controller, Hawk Performance brake pads, Ranch Hand crossover box, and Turbolined bed.