I recently bought a 99 Ford Ranger 4.0 5 speed 4x4. when I bought the truck the 4wd worked fine. last week I tried to engage the 4wd and got nothing and the 4x4 high and 4x4 low lights on the dash started flashing. I replaced the shift motor on the transfer case, the 4x4 module underneath the dash and the switch in the cab and still have no 4wd. When I turn the switch to engage 4wd nothing happens. I have tested the shift motor and it does work. What else might it be? Thanks for the help

 

When the lights were flashing, did they flash a few times and then go solid, or did they continuously flash? When my airbags went off, my air bag light flashed 1 time, then 3 times, repeated, then stayed solid after that. I researched that 1, 3 code and found what my problem was. You might be able to do the same for your 4x4 issue.

 

the lights both flash 6 times then will stop, then will flash 6 times...this is constant, the lights never come on solid. I'll try to do a little research and see. Thanks!

 

Did a little reading, I found the #26 10 amp fuse blown, tried to replace it but it keeps blowing.

 

Sounds like something is shorting out. Check the wires at the transfer case and in the dash for rubbing

 

Checked the wiring on the switch and the t-case motor, everything looks good. Unplugged the switch and the motor and the fuse still keeps blowing.

 

seems the module behind the radio might be part of the problem, with this connector unplugged the fuse does not blow.

 

Well I feel pretty stupid but I figured out the problem. It seems as if the dome light was actually shorting out the circuit, unplugged it and all is well with the 4wd now. Luckily I am only out about $100 from the parts I bought. Thanks for the help!

 

Glad that you got it solved pretty cheap. What did you do with your dome light to keep it from shorting out the circuit?

 

If it was your dome light that module you see pictured above also controls that. The module could possibly be going.