Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

change 4x4 axle control to toggle switch ??

  #1  
Old 03-01-2019, 02:14 PM
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Default change 4x4 axle control to toggle switch ??

I am having trouble with the front diff engaging.
It blows the fuse , the thermal actuator works , but after a couple minutes the circuit blows the fuse.
Unpluging the actuator and the switch that shows the axle is engaged does not prevent fuse blowing.
Logic says I have a short in the harness, it's -25 out, and no shop. the the harness is good for as far as I can access it , but it has to have a short up top somewhere.
A simple fix would be to run a fresh wire to the front axle thermal plunger on a LED indicating toggle .and unplug the existing harness , so far I am ok with this,
Now, to monitor if the axle is actually engaged before taking off in 4x4 .This was always done with the factory light on the floor shift , but this is also controlled by the same circuit that blows.
It seems that the axle engaged switch is no more than a switch that sends power thru it to an indicator light on the floor.

Can I tap into the thermal plunger's power wire I am running to the switch that shows the axle is engaged , and add a LED indicator on the ground side switch wire ,beside where I will install the toggle ? Should be fine I think but ...will full power to the LED burn it out ? I don't think so , but unsure. I want to go ice fishing.

I will be using a 30 amp lighted toggle and a 30/40 amp relay .
 

Last edited by petew; 03-01-2019 at 02:29 PM.
  #2  
Old 03-04-2019, 03:23 PM
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In my experience the problem is usually the actuator itself. I've changed my trucks to posi lock cables for reliability.
 
  #3  
Old 03-06-2019, 05:08 AM
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Originally Posted by burnhedge View Post
In my experience the problem is usually the actuator itself. I've changed my trucks to posi lock cables for reliability.
It has a new actuator, the old one was slow to extend when I took it out, so I put in a new one.
Tomorrow I will wire in a toggle and relay and see what shakes.
 
  #4  
Old 03-07-2019, 09:14 PM
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Good news everything is working fine with the new controls for the front Axle. The axle engages with a flip of the switch , and as a side benefit I can have 2L if I ever want it. I never use 4L , but the option is there .
 

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