Need Help

[Mrlanevo5]

No problem. I had something very similar happen in my truck not too long ago. I found that the ground connector under the intake manifold was the culprit. I've also had a loose ground that kept illuminating the rear diff lock light in the instrument cluster. The trouble with that last one is that I don't have front or rear diff locks. Every time the light would start trying to illuminate, I would say to myslef "I wish!"

Let us know how it all turns out.

I'll let everyone know what I find out. Thanks!!

 

[White Sheep]

These are the ones I bought. They are the background and shift lights. I'll send you a different list tonight.

Amazon product ASIN B06WGR33QY
Amazon product ASIN B079L3WBDN

Post in thread 'Definitive led thread for 80s' Definitive led thread for 80s - https://forum.ih8mud.com/threads/definitive-led-thread-for-80s.213060/post-12682745

Get T5 LEDs from Amazon for the bottom row of lights

 

[Roxx]

I will check the connections of the sensor at low. The center differential and abs light come on when you select 4L. I dont know if it is power or ground but that is the only switch that bring those two lights on. I will start there. If you have a cdl switch turn it on and both like will come on. If you don't light are controlled by 4l.

 

[Mrlanevo5]

After letting the truck sit for a couple of hours I jumped back in to see what would happen. No lights for the first 25 minutes of my drive. After that the ABS light came on first and stayed on, no flickering. The CDL light came on shortly after that (30 seconds) would flicker, then stayed on along with the ABS for the rest of the drive, about 15 minutes with no flickering.

 

[izzyandsue]

There’s a switch that lets you know the cdl is locked and will turn on those lights. This switch, basically a part present sensor makes contact with a ball and spring and can get dirty, be faulted. It’s easy to replace, 24mm socket or metric adjustable wrench is all you need to remove it and test it, clean it, replace it. Last time I got one was about $20. This switch will be on the transfer case and look like these:

 

[Mrlanevo5]

There’s a switch that lets you know the cdl is locked and will turn on those lights. This switch, basically a part present sensor makes contact with a ball and spring and can get dirty, be faulted. It’s easy to replace, 24mm socket or metric adjustable wrench is all you need to remove it and test it, clean it, replace it. Last time I got one was about $20. This switch will be on the transfer case and look like these:

View attachment 2559876

I've already replaced all 3 switches on the transfer case, this didn't fix the problem.

 

[jfz80]

Did you inspect the pin outs in each switch plug?

Maybe one of the pins is loose or broken? Kind of a stretch but a possibility. Otherwise I would guess loose/shorted ground as well.

 

[lumbee1]

If the light doesn't come on with 4L, have you tried engaging 4L and moving the wires around to see if the lights will flicker to life? Not dangerous if the truck is left in park.

 

[SFROMAN]

My truck had the abs light on for a while could not figure out what the problem was. Also kept getting intermittent lights on my dash ever so often.
At first I thought it was loose battery terminal because one was loose and I tightened it and it sort of got rid of the problem minus the abs light.
I replaced the terminals for new better ones eventually but there was no change. I checked the alternator wire and noticed it was loose.
I tightened the nut that holds the wire and fixed all my problems with my dash.
visually the wire looked like it was in there fine. But it was just loose enough that it wasn’t making correct contact with the alternator.

so I would say check that and see what happens.