Intermittent 4X4 .... again

[Effieman]

I tried (about 5 times) to shift my 98 into 4X4 the other day. When I turned the switch, the 4X4 light would come on and immediately go off, or blink several times (forgot to count), then go out. The next time I switched it into 4X4 before starting it and it worked, or at least the light stayed on.
Had similar problem years ago where the light would blink 5 or 6 times (forget) then go out. Also had problem with the light staying on indicating it was in 4X4, but it actually wasn't.
Is there anything to check before I just replace the shift motor?

 

[Shadowrider6661]

Check the contact on the shift motor, there's also a wire running into the transfer case. One other thing, double check the shift motor connector plug. These are all of the areas that I had problems with. Other than that, your guess is as good as mine. I hope this helps.

 

[Broosedamoose]

I had a 98 B4000 that did the same thing and it turned out to be bad hubs. Are they the vacuum type?

 

[Effieman]

Broosedamoose: Yes, they are the vacuum hubs. I figured when they go 4X4 would never work again, so I've never looked into that possibility.

 

[Effieman]

Shadowrider6661: I don't know what you mean about the contact on the shift motor. Are you talking about inside the motor, or the mounting surface of the motor?
I haven't looked at the wire running into the transfer case or the plug yet...maybe if it ever warms up and quits snowing/raining.