I was driving my 97 blazer when the abs light came on and lost speed. I could shift manually, not automaticly.

Question

I also lost all my speed readings and odometer readings. The Tack readings are there and racing when I give gas. The ABS light came on and would stay on. I was able to drive manually for awhile but now I can only go about 15 mph. Recently I lost the reverse on it. Also the gas gage was giving odd readings. Would show me empty when there was half a tank or more. Then would show full when there was 3/4 tank. One shop says tranny and another says speed sensor. At this point am not sure what to think. Have dealt with tranny problems with a Dodge Truck and this is very different. Im not hanging up in any gear and then slamming into another with this. I was able to shift from first to second and so forth. Any hints might help before I shoot the thing and bury it. Thanks in advance.

Answer 1

Take it to a shop and have then clear all codes in the computer. It sounds like the conputer has lost contact with the trans,ABS and the fuel gage if that the case this will fix it.........

Answer 2

Most likely it is the speed sensor, without it's input the computer has nothing to judge shift parameters from. The speed sensor input is also needed for the ABS since it needs to know how fast the vehicle is moving in order to determine pulse rate for brake apply.

Answer 3

Sounds like the voltage regulator pushed about 20 volts into the computer. Check your alternator, check your battery, make sure it's not above 13.8 volts and not below 12.0 volts. If that all checks out, I'd start looking into the computer and the wiring harness going to the computer.

Answer 4

Disconnect battery for some 15sec. Same readiongs?
Follow #3 adv.!

Answer 5

Has the modulator been checked or changed? That might be your problem. Has the tranny filter been changed or checked? Those might be some problems. Oh, if you do shoot and bury it, burn it first.