SPEEDOMETER PROBLEMS---HELP!!!!
#1
SPEEDOMETER PROBLEMS---HELP!!!!
I have a 78 F150 that originally came with a Kilometer speedometer gauge (truck must have been built in Canada) and I purchased an entire used instrument cluster that had the MPH speedometer gauge.
When I installed it and took it for a drive, once I hit 30-35 mph, the speedometer suddenly made an extremely loud (I mean loud!!) buzzing sound and the speedometer needle instantly wound clear around past 80 mph and bounced around at the bottom of the speedometer gauge (down by the odometer). When I slowed down to less than 30-35 mph, it quit making the loud buzzing noise and the needle went back to functioning normal.
The noise almost sounded electrical (kind of), but not sure. The gauge is operated by a cable, so I didn't think it was an electrical problem or a problem with the printed circuit board, but who knows....I'm not sure.
I took the cluster out of the truck and took the speedometer gauge out of the cluster and visually inspected it for any obvious broken or worn components, but everything looked brand new; was in really good shape with no sign of wear whatsoever. Since I'm at a loss, I decided to ask you guys for help....
Questions....
1) Has anyone ever had this happen to them?
2) If so, what was the problem and what did you do to fix it?
3) Could this be a problem with the printed circuit board?
4) Is this an electrical problem or mechanical?
Thanks in advance for your advice....
When I installed it and took it for a drive, once I hit 30-35 mph, the speedometer suddenly made an extremely loud (I mean loud!!) buzzing sound and the speedometer needle instantly wound clear around past 80 mph and bounced around at the bottom of the speedometer gauge (down by the odometer). When I slowed down to less than 30-35 mph, it quit making the loud buzzing noise and the needle went back to functioning normal.
The noise almost sounded electrical (kind of), but not sure. The gauge is operated by a cable, so I didn't think it was an electrical problem or a problem with the printed circuit board, but who knows....I'm not sure.
I took the cluster out of the truck and took the speedometer gauge out of the cluster and visually inspected it for any obvious broken or worn components, but everything looked brand new; was in really good shape with no sign of wear whatsoever. Since I'm at a loss, I decided to ask you guys for help....
Questions....
1) Has anyone ever had this happen to them?
2) If so, what was the problem and what did you do to fix it?
3) Could this be a problem with the printed circuit board?
4) Is this an electrical problem or mechanical?
Thanks in advance for your advice....
#2
I too have the same question. When it started getting cold here in the morning my truck started acting the same way. Hissing noise and the needle on the speedo going crazy. I have thought that maybe my cable has some tension in it and is now ruined? I have also thought it could have a broken a gear tooth? Or that it just needs some lube on the cable. I haven't inspected anything as it has been cold and wet here.
Anyone care to let us in on what to do to fix it?
Anyone care to let us in on what to do to fix it?
#3
I too have the same question. When it started getting cold here in the morning my truck started acting the same way. Hissing noise and the needle on the speedo going crazy. I have thought that maybe my cable has some tension in it and is now ruined? I have also thought it could have a broken a gear tooth? Or that it just needs some lube on the cable. I haven't inspected anything as it has been cold and wet here.
Anyone care to let us in on what to do to fix it?
Anyone care to let us in on what to do to fix it?
#4
#6
I'm thinking and hoping you're right. Maybe I just need to put it back in and also check the tranny end of the cable and make sure it's seated and give it another shot. Thanks for the advice everyone...
#7
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#9
I don't think that's the problem. Doesn't make sense vs how it's acting and when it occurs (30-35 mph and above). If this was the problem, I would think it would do this from the start if it was a gear problem....who knows.....
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Questions....Answers hopefully
1) Has anyone ever had this happen to them? Sorry no
2) If so, what was the problem and what did you do to fix it? See answer to above question
3) Could this be a problem with the printed circuit board? No way, there is no electrical connection between the two
4) Is this an electrical problem or mechanical? mechanical
Thanks in advance for your advice....
1) Has anyone ever had this happen to them? Sorry no
2) If so, what was the problem and what did you do to fix it? See answer to above question
3) Could this be a problem with the printed circuit board? No way, there is no electrical connection between the two
4) Is this an electrical problem or mechanical? mechanical
Thanks in advance for your advice....
#15