Brakes and trans issues
#1
Brakes and trans issues
The truck has a couple problems and I'm not sure which direction to go. I've done a lot of reading but need help. The problems are separate but might have something in common.
Here's the DTC...
P0503 VSS Intermittent/erratic/high
P0720 Output speed sensor circuit
C1234 Speed wheel RF input signal missing
C1148 Speed wheel sensor coherency fault
Whatever is throwing the p0720 is intermittent. When at a stop the OD light flashes. At takeoff it feels like it's going to stall then like the trans slips before it gets going. It has actually stalled once. When it gets to cruising speed the OD light quits blinking. During the drive cycle the Speedometer on torque pro wigs out, and when going into park the RPMs spike to about 1400. I measured resistance of both the OSS and the VSS, both are within specs.
Now for the brakes... This started two years ago after I replaced ball joints, hubs, and rotors. Everything seemed good, the truck braked good but the ABS light was always on. On the snow and ice the ABS doesn't work at all. Lately, but not often the ABS light will go out and the front left locks up. The sensors ohm okay, and I get .3 volts from the sensor with the wheels spinning.
Correct me if I'm wrong. Both the trans and the ABS share input from the VSS.
I don't know which direction to go here.
I don't have a breakout box or any other means to check the circuitry.
Any help is much appreciated.
Here's the DTC...
P0503 VSS Intermittent/erratic/high
P0720 Output speed sensor circuit
C1234 Speed wheel RF input signal missing
C1148 Speed wheel sensor coherency fault
Whatever is throwing the p0720 is intermittent. When at a stop the OD light flashes. At takeoff it feels like it's going to stall then like the trans slips before it gets going. It has actually stalled once. When it gets to cruising speed the OD light quits blinking. During the drive cycle the Speedometer on torque pro wigs out, and when going into park the RPMs spike to about 1400. I measured resistance of both the OSS and the VSS, both are within specs.
Now for the brakes... This started two years ago after I replaced ball joints, hubs, and rotors. Everything seemed good, the truck braked good but the ABS light was always on. On the snow and ice the ABS doesn't work at all. Lately, but not often the ABS light will go out and the front left locks up. The sensors ohm okay, and I get .3 volts from the sensor with the wheels spinning.
Correct me if I'm wrong. Both the trans and the ABS share input from the VSS.
I don't know which direction to go here.
I don't have a breakout box or any other means to check the circuitry.
Any help is much appreciated.
#2
#4
#5
#6
#7
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post
jekstrom86
1983 - 2012 Ranger & B-Series
8
01-06-2009 05:51 PM
GozInSnowz
1983 - 2012 Ranger & B-Series
13
07-13-2008 04:28 AM