4x4 light won’t come on but 4wd is engaging

I own a 2008 Toyota Tacoma 4 x 4 and I just replaced the ADD on it And I hear that switch on and then I hear clicking in my glove box but there’s no light. This is my last resort coming on here seeing if anybody has had any issues similar to mine hope to hear what you guys have to say

 

Is the 4wd and/or L4 light flashing?

 

None of the lights for the 4wd are either flashing or turning on

 

Interesting but your sure the 4wd is engaging?

 

Yeah let’s say I put it into four wheel low and then try to put it back into four high without putting it in neutral the truck starts beeping and when I put it into four high, the truck jolt forward, so I’m pretty sure it is engaging

 

So it would seem we have either broken wires/bad connections on the indicator circuits, an issue with the 4wd ECU, or an issue with the Combination Meter (Instrument Cluster).

Do you have a test light?

 

Yes I do

 

Well I guess we can start at the 4wd ECU, backprobe the IND1 and IND3 circuits with a needle or other suitable tool. Test light connected to a known good Ground if you touch IND1 the 4wd light should light up, if you touch IND3 the L4 light should light up.

For info on accessing the 4wd ECU and pin locations see the thread below.
https://www.tacomaworld.com/threads/4wd-system-operation-help-thread.742420/

 

Hey I just replaced the ADD does that have anything to do with the lights not coming it’s activating and moving

 

Can't see what that would have to do with the lights as they are controlled byt the 4wd ECU.

Why was the actuator replaced?

Did the lights stop working immediately after or were thwy not working before?

 

Did you possibly break a wire or a pin when rehooking up the plug?

 

I think it’s gonna be the 4th ecu cuase today I tried using 4lo and all it did was stay clicking

 

Pretty rare for the 4wd ECU to fail, did you test the indicator light circuits?

 

No but I did see something wierd on the add it has a wire that is connected to a bolt and there’s tape around the connector

 

That's interesting, would be worth poking around there and seeing what is going on.

Did you just get the truck?

 

Yeah I’ve had it like 3 months now

 

This is the truck

 

Nice looking truck

 

Alr update turns out the ground cable is cut on the front diff actuators

 

As in someone cut it?