Speedometer doesn't work! - JeepForum.com

 
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post #1 of 12 Old 02-06-2010, 05:00 PM Thread Starter
newjeepusr
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Speedometer doesn't work!

On to my next problem, my speedometer doesn't work. Everything other gauge on the dash works but the speedometer. I am guessing it is cable driven off of the transmission? Any input fellas, and or ladies?

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post #2 of 12 Old 02-06-2010, 05:07 PM
Mean Max
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No, there is no speedometer cable on your '94.

It is driven by an electrical VSS (Vehicle Speed Sensor) signal from the transfer case. Here is where it's located on the driver's.


The sender in this pic is from my '91 which does use a cable, but the sender for yours is in the same location.

Max


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post #3 of 12 Old 02-06-2010, 09:55 PM
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easy way to tell for sure if its working is take it out and use a cordless drill to spin it while watching the speedo gage. If it works with the drill.. you will need to have it "clocked" correctly to work

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post #4 of 12 Old 02-06-2010, 10:21 PM Thread Starter
newjeepusr
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So take the dash out and use a cordless drill on it? Really? In addition to the speedo gauge not working, the dash lights are also out.
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post #5 of 12 Old 02-06-2010, 10:23 PM
Mean Max
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Quote:
Originally Posted by Mark05059 View Post
easy way to tell for sure if its working is take it out and use a cordless drill to spin it while watching the speedo gage. If it works with the drill.. you will need to have it "clocked" correctly to work
OP doesn't have a cable driven speedo.
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Originally Posted by newjeepusr View Post
So take the dash out and use a cordless drill on it? Really? In addition to the speedo gauge not working, the dash lights are also out.
Check all your fuses & connections to the gauges.
Max


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post #6 of 12 Old 02-06-2010, 10:23 PM
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Quote:
Originally Posted by Mark05059 View Post
easy way to tell for sure if its working is take it out and use a cordless drill to spin it while watching the speedo gage. If it works with the drill.. you will need to have it "clocked" correctly to work
Um.

How does a drill send a VSS signal over a wire?
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post #7 of 12 Old 02-06-2010, 10:26 PM
MJMPC
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No dont take the dash out for the speedo take th VSS out of the t-case and use a drill to turn the gear.

MIKE


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post #8 of 12 Old 02-06-2010, 10:26 PM
rivalarrival
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Install a GPS nav unit over the non-functioning speedometer.

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post #9 of 12 Old 02-06-2010, 10:39 PM Thread Starter
newjeepusr
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But, if it isn't a speedo cable... would that work?
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post #10 of 12 Old 02-06-2010, 10:47 PM
Mean Max
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Originally Posted by MJMPC View Post
No dont take the dash out for the speedo take th VSS out of the t-case and use a drill to turn the gear.
I feel like an idiot. I envisioned spinning a cable at the speedo head. I was suffering from tunnel vision apparently.
THAT is exactly what he could do.
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But, if it isn't a speedo cable... would that work?
Yes, if you use a drill to spin the gear on the sender, it will generate a signal just as if the T-case was spinning it. If the sender is working properly, that is.
Max


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There is no situation that cannot be improved with a small but well-placed explosive.
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post #11 of 12 Old 02-06-2010, 10:54 PM
MJMPC
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Originally Posted by newjeepusr View Post
But, if it isn't a speedo cable... would that work?

Trust us we didnt tell you wrong about your parkingbrake did we?

MIKE


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post #12 of 12 Old 02-06-2010, 10:55 PM Thread Starter
newjeepusr
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thanks, I will do it in the morning.
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