Speedometer quite working.
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From: hondo
Speedometer quite working.
Gentlemen
I removed the dash face or cover to replace the flasher with one that would work with leds. I realize I didn’t have to do that now. Anyway when everything was buttoned up I checked lights it was good and put truck back in garage. When I drove to work the next day I noticed that my speedometer was not working. I doubled checked everything and all the connections are connected. But does any of those connections have anything to do with speedometer? I don’t think so. Does any body have any recommendations? Would really appreciate it. Thanks.
Gilbert
I removed the dash face or cover to replace the flasher with one that would work with leds. I realize I didn’t have to do that now. Anyway when everything was buttoned up I checked lights it was good and put truck back in garage. When I drove to work the next day I noticed that my speedometer was not working. I doubled checked everything and all the connections are connected. But does any of those connections have anything to do with speedometer? I don’t think so. Does any body have any recommendations? Would really appreciate it. Thanks.
Gilbert
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From: Jersey Shore
By "dash face", if you meant the cluster with all the gauges, yes the speed signal comes in through the connections electronically. One of the pins may have become dislodged and pushed into the back of the connector.
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From: hondo
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From: Jersey Shore
There should not be, although always the possibility some connection got dislodged.
The speedometer signal starts at the differential from the ABS tone ring, goes to the ABS computer where it is calculated, then the signal is distributed to all components that need a speed reading. If the PCM doesn't get one, it reads other inputs but does not transmit that in place of the original ABS output to the dash and elsewhere.
If the signal is not getting to only the cluster, then the speed control should still work. And if you have a monitor hooked to the OBD port, that should also read speed. But if those do not happen to have a proper signal, then something outside of the dash is faulting, and it's just a coincidence to happen at the time of the dash work.
The speedometer signal starts at the differential from the ABS tone ring, goes to the ABS computer where it is calculated, then the signal is distributed to all components that need a speed reading. If the PCM doesn't get one, it reads other inputs but does not transmit that in place of the original ABS output to the dash and elsewhere.
If the signal is not getting to only the cluster, then the speed control should still work. And if you have a monitor hooked to the OBD port, that should also read speed. But if those do not happen to have a proper signal, then something outside of the dash is faulting, and it's just a coincidence to happen at the time of the dash work.
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More Turbo
Joined: Dec 2003
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From: hondo
There should not be, although always the possibility some connection got dislodged.
The speedometer signal starts at the differential from the ABS tone ring, goes to the ABS computer where it is calculated, then the signal is distributed to all components that need a speed reading. If the PCM doesn't get one, it reads other inputs but does not transmit that in place of the original ABS output to the dash and elsewhere.
If the signal is not getting to only the cluster, then the speed control should still work. And if you have a monitor hooked to the OBD port, that should also read speed. But if those do not happen to have a proper signal, then something outside of the dash is faulting, and it's just a coincidence to happen at the time of the dash work.
The speedometer signal starts at the differential from the ABS tone ring, goes to the ABS computer where it is calculated, then the signal is distributed to all components that need a speed reading. If the PCM doesn't get one, it reads other inputs but does not transmit that in place of the original ABS output to the dash and elsewhere.
If the signal is not getting to only the cluster, then the speed control should still work. And if you have a monitor hooked to the OBD port, that should also read speed. But if those do not happen to have a proper signal, then something outside of the dash is faulting, and it's just a coincidence to happen at the time of the dash work.
I was going to replace the sensor but thought I would check with you guys first. Thanks
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From: Spanaway
You might try and trigger the cluster test mode.
https://www.ford-trucks.com/forums/1...tml#post881832
https://www.ford-trucks.com/forums/1...tml#post881832
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From: Jersey Shore
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Fleet Owner
Joined: Apr 2012
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From: Spanaway
It's does not always fix the problem.
It is a good way to sometimes unstick a stuck pointer when the tiny spiders have made a web.
I had a case of the tiny white spiders make a web in the first few ports of a gas pool heater. Needless to
say when the gas got over to the pilot light the heater barked really loudly. Can you say FREE HAIRCUT.
That is one reason when working on gas heaters I always have on safety glasses.
It is a good way to sometimes unstick a stuck pointer when the tiny spiders have made a web.
I had a case of the tiny white spiders make a web in the first few ports of a gas pool heater. Needless to
say when the gas got over to the pilot light the heater barked really loudly. Can you say FREE HAIRCUT.
That is one reason when working on gas heaters I always have on safety glasses.
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From: Spanaway
Okay, You want to get under the truck at the rear axle and remove the sensor and clean the tip.
Then give it a try. That is the no parts fix and it may not do the job but it's free other than you time.
The next thing to do is read codes. You need one of the tools that will read body codes.
The SGII is not one that will. Forscan with the adaptor will along with the high end scan tools.
Also most programers will not give you the codes.
Then give it a try. That is the no parts fix and it may not do the job but it's free other than you time.
The next thing to do is read codes. You need one of the tools that will read body codes.
The SGII is not one that will. Forscan with the adaptor will along with the high end scan tools.
Also most programers will not give you the codes.
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Joined: Dec 2014
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From: Jersey Shore
As Sean said, sometimes there is enough iron debris buildup to mask the tone wheel count. But they also go bad from that. Also, check the wiring up to the frame, which has been known to fatigue break over time.
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