Hi there,

Thanks for your reply. Update on my 1995 Volvo 960, codes are (OBD1- blinking LED lights): A1 124 (short circuit in WSE switch), A1 232 (speedometer signal missing), and A3 155 (rear differential sensor open circuit or short to battery voltage).

What I have done is so far: Its hard to clear those codes (doesnt want to be cleared following the 5 second push of the OBD1), after disconnecting the battery for long period (there will be no flashing lights), when ignition on the E and S both light up, then goes to W only then back and forth between (SE and W). After starting and putting the trans to drive, the arrow will flash constantly and so the WSE after getting to around 20-30 MPH.

I replaced the WSE switch (nothing changed!), checked the speed wire from the cluster to the TCM (green gray wire) and its intact. Checked the resistance of the speed/ABS sensor at the diff, and gave normal 1400 ohms. Checked the wires from the diff to the under the glove box above the ABS module (white green and white brown) and they show continuity. I spun the rear wheels while measuring the AC current from the trunk wires and was ok. I really dont know what to do more!

The car was in New jersey and Florida earlier, so it has been only 1 month in Cleveland, no rust or whatsoever under neath.The problem is constant and not intermittent.

I have ordered a second hand TCM, and waiting for it, but I dont think it will solve the problem.

I appreciate your help.