1994 Cherokee Speedometer Problem - JeepForum.com
 
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post #1 of 7 Old 10-03-2006, 07:25 AM Thread Starter
thaze
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1994 Cherokee Speedometer Problem

Recently purchase a 94 Cherokee for my son and the speedometer does not work. Not knowing much about jeeps nor having torn the dash apart yet, have determined that the speedometer is not mechanical. Is it fed from the switch mounted on the transfer case? Are there diagnostic tests that I can do to determine what the problem is? The rest of the instrument cluster works. Thanks

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post #2 of 7 Old 10-03-2006, 07:43 AM
conrasm
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You right, the speedo runs off an electric signal from the back of the transfer case. There's a small gear turns off of the TC output shaft. I would start by pulling that out (pretty easy) and taking a look at the gears to make sure they aren't worn, then try tracing the wires for shorts or bad connections. Also check the back of the guage cluster for bad grounds. There are four screws holding the back trim on and some clips. It's a little tricky to manuever out.

You should be able to find a speedo pretty cheap in a junk yard, or even consider doing a guage cluster swap if you don't have the tach/oil pressure/temp/voltmeter and if your son plans on wheeling it. The extra info about the engine is nice to know.

I got a cluster off ebay for $30 shipped and spent about $35 on sensors to convert it over.

Shawn
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'06 Grand Cherokee Limited
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post #3 of 7 Old 10-03-2006, 05:56 PM Thread Starter
thaze
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Thanks for the info. We pulled the gear from the transfer case and it looked perfect. Checked the wiring back as best we could until it disappeared in the bundle near the firewall. Pulled the instrument panel, snugged the screws on the back and checked the connection. All looked good, but it still does not work. The instrument panel includes guages for the oil, gas, battery, temp and a tach. They all work properly. Any chance that there is a fuse specifically for the speedometer? Thanks again.
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post #4 of 7 Old 10-03-2006, 06:49 PM
foreman1063
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Make sure the VSS( the part that holds the speedo gear and sends the signal to the speedo) is oriented correctly. The numbers on the VSS corresponding to the number of teeth on your gear should face down, next to the bump on the xfer case.
Good pic here.
http://jeepin.net/forum/showthread.p...599#post508599
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post #5 of 7 Old 10-03-2006, 08:19 PM Thread Starter
thaze
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I will try that tomorrow. Thanks!
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post #6 of 7 Old 10-04-2006, 06:32 PM Thread Starter
thaze
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Foreman1063 - you were right on the money! I lined the VSS up so that the bracket fit in the slots on the VSS as your picture showed and the speedo, odometer, and the trip are now working correctly. By the looks of the gear, I would say someone replaced it and then did not get the VSS installed correctly. Thanks!
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post #7 of 7 Old 10-04-2006, 07:42 PM
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Glad it worked out.
John
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