If you show no voltage on one terminal on the top of the fuse, the fuse is bad, replace it and check it again.

 

I went out and double checked the fuses tested them with 3 different other fuses that were currently working and im still reading nothing on the voltage meter. Theres gotta be a electrical problem, something shorting out somewhere hence why my overhead led display flickers on and off randomly. thanks alot for the help

 

try removing/unplugging the over display and try the fuse thing again.

 

Ok I went out and checked the fuses with the volt meter the correct way and all the fuses are getting voltage where there suppose to be.

 

Hey, I had a similar problem with my 4wd/gauges and it turned out to be the Front Axle Engagement Switch. Messed up a bunch of the gauges including the data that shows on the overhead LED screen.

For me, the Front Axle Engagement Switch was the problem. Not the 3-prong air connector but the 2-prong electrical connector on the front axle. $8-$13 fix.

Check out my thread here:
https://blazerforum.com/forum/2nd-ge...e-65704/page2/

 

I had the same problem i just disconected the bat and hook it back up and its ben working for months hope it helps

 

The flickering also makes it sound like it could be a faulty ground. Check the thread below (and links within the thread) for images showing where the 3 grounds behind the dash are. Make sure they are all tight. If the ground is loose, it could cause the circuits to intermittently drop and regain power.

 

I know this thread is old, but I'm having the same issues. I've noticed the vent tube for trans leaks air when I manually push in on the actuator. I bypassed the vacuum relay system by putting zip ties around the actuator so the front diff locks in. I go into the truck and all I hear is the tccm click and the 4hi lights or 4 low flash. I moved the truck around and now the lights no longer flash the tccm just clicks when I push the 4hi or 4 low It's still not engaging into 4wd. I've checked the tccm connections, they are good. I've put two different encoder or tfc motors on the truck. They both spin (operate) when they aren't hooked up to the transfer case. I'm going to attempt to ground out the number 9 pin on obd2 connector and see what it flashes. If anything. All else fails I'll manually put it in 4wd to get around in the snow.

 

any chance it could be related to a ignition switch issue? i have a '97, 3-button. it has a starting problem where you have to hold the key to th start postion as it starts or it wont run, i noticed the other day when i did get it to run that the 4-hi button would blink if i tried to engauge the 4wd. the next day the 4wd worked. i know its not a front axle issue as ive rigged the front axle to always be engaged, its been that way for years (as is my '96). so im wondering if my ignition switch is causing multiple issues.