No Speedo, No 3rd or 4th gears, ABS light
#1
No Speedo, No 3rd or 4th gears, ABS light
Coming off the highway today our 1997 Blazer 4dr 4x4 did not want to move. Here is what I have noticed. If in OD & the ABS light is on it will not shift. I can manually shift it as far as 2nd. Sometimes the speedo will come off 0 right around 2300 rpm in 2nd. At that time I can put it in OD & it will shift into 3rd & then 4th normally. Everything worked just fine prior to today. No ABS light, speedo was fine, trans acted normally. I am thinking it is probably the VSS but was looking for opinions from Blazer gurus. Ideas guys? A search here brought up the VSS is usually the culprit with ABS light issues. It would make sense if shifting is controlled by speed input.
Last edited by elgemcdlf; 08-06-2013 at 08:30 PM.
#2
Definitely sounds like a VSS issue to me. Make sure you check the connections before replacing the sensor. 4x4's have a short extension to relocate the VSS to the transfer case, I had one where the connection to the extension went bad and still acted like a faulty VSS.
Now whenever I replace a VSS in a 4x4 I usually go and solder those wires together and shrinkwrap them so it can't fail.
Now whenever I replace a VSS in a 4x4 I usually go and solder those wires together and shrinkwrap them so it can't fail.
#3
Something to add to this. After letting the truck sit for 2 hrs everything worked as normal. Could the VSS react to heat as old Ford ignition modules would. Get hot & quit working. Cool down & all is good again till it gets hot or could I be looking at the module under the hood just behind the battery?
Thread
Thread Starter
Forum
Replies
Last Post