Originally Posted by twofiftyseven

Looking for some advice:

2000 Toyota 4Runner Limited 4WD

Automatic with Multi-Mode 4wd(J Shift with AWD button on the side).

I am experiencing the infamous flashing 4wd indicator on the dash and after many attempts I cannot fix it. I’ve read every thread regarding this and still haven’t found a fix.

It randomly started one day and has been going on for a few months. It usually flashes for equal times although sometimes it will flash sporadically. I cannot get the lights to go away(sometimes they go away on their own but return). I cannot go into AWD, HI or Low. The rear diff locker works. What I've done/tested:

1) Tested/replaced of the 6 4wd indicator switches (5 on T case, 1 on front diff). I replaced 3/6; they weren't broken but weren't showing perfect continuity either. I have check all the wires and connectors going to them as well.

2) I have tested the front diff actuator. I can get it to lock/unlock by switching the vacuum hoses. So that seems to be in working order.

3) I have tested the transfer case actuator. I can jump it using a battery and get it to lock and unlock. So that seems to be in working order as well.

4) I have replaced the 4wd ECU. That didnt seem to change anything. The only reason I thought this could be it was I had a set of cheap HID's that seemed to go out around the same time and figured maybe I fried the unit.

5) Checked the 4wd fuse and have tried to reset the capacitors and similar components by disconnecting the battery.

6) I've replaced the fluids.



I'm not sure what else to try. If anyone has any advice it would be much appreciated! I'm split between tahoe and the bay area if anyone is local and able to help.

Thanks in advance!