Lock/PDL switch blinking

Reycer · Dec 18, 2013

Have a 2010 Prostar. Just at random the Lock/PDL switch starts blinking when in the off position. Took it to a dealership in KC and they didn't know. Doesn't stay blinking but every so often going down the interstate I'll look over and the darn green light has started blinking again, and then after a while stops. Anyone have an idea?

Heavyd · Dec 18, 2013

It depends on how it is flashing. There is a slow and fast flash. A slow flash of one blink per second means that some programmable interlock condition has not been met. For example, too high of a road speed to have it engaged. If it is in the off position I would expect it to be fast flashing which is 2 blinks per second. This means a problem with the circuit or solenoid has been detected. The body controller should be setting a code for this.

CondoCruiser · Dec 18, 2013

From the owners manual it indicates a problem. pdf copy sorry don't feel like fixing it.

Tandem Axle Power Divider Lock (PDL) ControlCAUTION
Do not operate the vehicle with the PDL engaged
on dry pavement (good traction) continuously.
This will result in excessive tire wear and
premature axle wear.
Never engage the PDL when the wheels are
spinning.
The PDL should be engaged, which prevents inter-axle
differential action, when backing under a trailer with a tractor,
starting on a slippery surface (poor traction), operating off
highway in mud, etc. (poor traction), or when traveling on
slippery highways (poor traction). Failure to lock the power
divider under these conditions may result in power divider
failures and costly repairs. If you encounter wheel spin
conditions, the PDL switch should be moved to the LOCK
position.
CAUTION
Engage the PDL only when stopped or moving at
low speed. Never try to engage the PDL while the
wheels are spinning as this may result in shock
damage to the power divider components.
When encountering slippery highway conditions (poor traction),
the PDL can be engaged at a low, even speed. Momentarily
letting off the accelerator will engage the differential lock. A
warning indicator on the instrument panel indicates when the
inter-axle differential is locked.
When highway conditions improve (good traction), the PDL
should be disengaged, again at a low, even speed. Letting
up on the accelerator momentarily will unlock the inter-axle
differential.
Tandem axle power dividers or inter-axle differentials
in the forward rear axle are controlled by the dash
mounted Power Divider Lock (PDL LOCK) switch.
The switch indicator will turn on when the PDL is
engaged (locked). The vehicle may be electronically
programmed to provide an alarm when a speed is
reached where it is not appropriate to have the power
divider locked. In this event, an alarm will sound (5 beeps) and
the switch indicator will flash slowly (once per second). A fast
flashing (twice per second) switch indicator signifies a problem
in the PDL system.
Under normal highway conditions (good traction), the PDL
should be disengaged, which allows differential action between
the forward rear axle and the back rear axle preventing inter-axle
differential wear due to unequally worn or mismatched tires, etc.
Click to expand...

maxx13 · Apr 3, 2017

Heavyd said: ↑

It depends on how it is flashing. There is a slow and fast flash. A slow flash of one blink per second means that some programmable interlock condition has not been met. For example, too high of a road speed to have it engaged. If it is in the off position I would expect it to be fast flashing which is 2 blinks per second. This means a problem with the circuit or solenoid has been detected. The body controller should be setting a code for this.
Click to expand...

Hopefully you can help me out...
Everytime it rains, my truck loose power for throttle, and the oil gauge goes crazy? But tbe truck never shuts off, just no response?

Heavyd · Apr 3, 2017

Sorry, no trick or secrets here, you need to connect to it to see what is going on. Any fault codes, check throttle pedal % and so on. To me you are getting water in somewhere and it is shorting out some wires.

maxx13 · Apr 3, 2017

Heavyd said: ↑

Sorry, no trick or secrets here, you need to connect to it to see what is going on. Any fault codes, check throttle pedal % and so on. To me you are getting water in somewhere and it is shorting out some wires.
Click to expand...

I have found water dripping driver side windshield at piller?

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