short in wire....speedometer problem
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From: philly pa
short in wire....speedometer problem
95 F150 I6 2wd M5OD
A few weeks ago I began having a problem w/my speedometer jumping around. Whenever the needle would jump around the truck would also buck. Another interesting observation is that, even in neutral, if the truck began to coast at low speeds the truck would stall, even moving from a dead stop on a hill. Because it was in neutral I knew the problem had to be electrical.
I unplugged the ABS sensor, where the truck gets the speedometer reading and that fixed the bucking and stalling, but now I have no speedometer and naturally my odometer reading doesn't move. After running diagnostics on it I narrowed it down to a short in a wire, I'm assuming one of the wires that runs from the ABS sensor to the ignition control modual. I now have three questions.
1. Has anybody ever experienced a problem like this?
2. How do you test the wire to find which one is bad?
3. Where can I located the correct color coded replacement wires so that I can use the manual for future repairs.
Other than this problem the truck runs perfectly.
A few weeks ago I began having a problem w/my speedometer jumping around. Whenever the needle would jump around the truck would also buck. Another interesting observation is that, even in neutral, if the truck began to coast at low speeds the truck would stall, even moving from a dead stop on a hill. Because it was in neutral I knew the problem had to be electrical.
I unplugged the ABS sensor, where the truck gets the speedometer reading and that fixed the bucking and stalling, but now I have no speedometer and naturally my odometer reading doesn't move. After running diagnostics on it I narrowed it down to a short in a wire, I'm assuming one of the wires that runs from the ABS sensor to the ignition control modual. I now have three questions.
1. Has anybody ever experienced a problem like this?
2. How do you test the wire to find which one is bad?
3. Where can I located the correct color coded replacement wires so that I can use the manual for future repairs.
Other than this problem the truck runs perfectly.
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From: Virginia
[quote]After running diagnostics on it I narrowed it down to a short in a wire, I'm assuming one of the wires that runs from the ABS sensor to the ignition control modual.{/quote]
How did you arrive at the conclusion it's a wiring problem? Did you replace the sensor and it still didn't work? Some people have had problems with the rearend, and the sensor would not pick up the gear teeth properly(I am assuming your speed sensor is mounted in the rearend housing).
Here's a picture
http://www.autozone.com/images/cds/g...3d800a3a53.gif
That shows the speed sensor wires to be grey/black and pink/orange.
How did you arrive at the conclusion it's a wiring problem? Did you replace the sensor and it still didn't work? Some people have had problems with the rearend, and the sensor would not pick up the gear teeth properly(I am assuming your speed sensor is mounted in the rearend housing).
Here's a picture
http://www.autozone.com/images/cds/g...3d800a3a53.gif
That shows the speed sensor wires to be grey/black and pink/orange.
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Joined: Jan 2001
Posts: 56,993
Likes: 2,741
From: Virginia
One thing you can do to double check your on the right track is to try to pull codes from the computer. You should get a vehicle speed sensor error. Your check engine light should be on if it has a code.
I was reading in my fuel injection book, and you can also jack the rear of the truck up and put it on jack stands, start it up and put it in gear and let it idle with the wheels slowly turning. The book said you should get at least 0.5v ac or more from the sensor.
If you think it's the wiring, more than likely it's going to be along the frame underneath where it can get caught and damaged. I wonder if you can find the problem by just visually checking the harness for damage.
I was reading in my fuel injection book, and you can also jack the rear of the truck up and put it on jack stands, start it up and put it in gear and let it idle with the wheels slowly turning. The book said you should get at least 0.5v ac or more from the sensor.
If you think it's the wiring, more than likely it's going to be along the frame underneath where it can get caught and damaged. I wonder if you can find the problem by just visually checking the harness for damage.
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From: philly pa
Originally Posted by Franklin2
One thing you can do to double check your on the right track is to try to pull codes from the computer. You should get a vehicle speed sensor error. Your check engine light should be on if it has a code.
I was reading in my fuel injection book, and you can also jack the rear of the truck up and put it on jack stands, start it up and put it in gear and let it idle with the wheels slowly turning. The book said you should get at least 0.5v ac or more from the sensor.
If you think it's the wiring, more than likely it's going to be along the frame underneath where it can get caught and damaged. I wonder if you can find the problem by just visually checking the harness for damage.
I was reading in my fuel injection book, and you can also jack the rear of the truck up and put it on jack stands, start it up and put it in gear and let it idle with the wheels slowly turning. The book said you should get at least 0.5v ac or more from the sensor.
If you think it's the wiring, more than likely it's going to be along the frame underneath where it can get caught and damaged. I wonder if you can find the problem by just visually checking the harness for damage.
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Joined: Jan 2001
Posts: 56,993
Likes: 2,741
From: Virginia
Does anybody know how to test the wires and replace sections od wire?
