Non-Working Speedometer, New Vss, Diff. speedo, what next? - Taurus Car Club of America : Ford Taurus Forum
 
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post #1 of 6 (permalink) Old 06-25-2012, 05:05 PM Thread Starter
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Question Non-Working Speedometer, New Vss, Diff. speedo, what next?

Hey all,
My son bought a '97 Gl, it has at least 178K miles. Vulcan motor. Speedometer does not work, so, replaced the VSS, no change. Cruise Control does work, as do all the dash lights. The transmission shifts fine, and there are no driveability problems/issues. Went to the boneyard and bought a cluster out of a '96, the circuit board is different, but the speedometer is the same(part # identical). Swapped out the speedometer, still no workie. Arrgh. Checked continuity on circuit board traces, it was perfect. Put original speedo back in. Worst part so far is that my son spent 40 bucks on the cluster, and they won't take it back.

Anybody have a next step? I don't have any wiring diagrams, at least not yet.

Thanks in advance.
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post #2 of 6 (permalink) Old 06-25-2012, 06:37 PM
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Here's the diagram: http://www.revbase.com/BBBMotor/Wd/D...6-b23bf84b32ae

Looks like you should check fuse 24 and 5 under the dash. The other possibility is that the signal wire (gray with black stripe) from the fuse panel is damaged and the signal isn't reaching the instrument cluster.
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post #3 of 6 (permalink) Old 06-25-2012, 11:06 PM Thread Starter
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Thanks a bunch

That gives me some good info and places to check. I believe I checked fuse 5 already, but I may have got the wrong one, as the owners' manual numbers are not listed on the fuse box, or maybe I'm just reading it wrong.
Thanks again
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post #4 of 6 (permalink) Old 06-25-2012, 11:45 PM
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Quote:
Originally Posted by saccomarx View Post
Hey all,
My son bought a '97 Gl, it has at least 178K miles. Vulcan motor. Speedometer does not work, so, replaced the VSS, no change. Cruise Control does work, as do all the dash lights. The transmission shifts fine, and there are no driveability problems/issues. Went to the boneyard and bought a cluster out of a '96, the circuit board is different, but the speedometer is the same(part # identical). Swapped out the speedometer, still no workie. Arrgh. Checked continuity on circuit board traces, it was perfect. Put original speedo back in. Worst part so far is that my son spent 40 bucks on the cluster, and they won't take it back.

Anybody have a next step? I don't have any wiring diagrams, at least not yet.

Thanks in advance.
If you had a Live data OBD2 scanner, you could check the VSS electrically
by looking at the speed on the scanner.

Bob Urz 1989 Vulcan wagon (wife crashed) 1990 Vulcan sedan (sold running) 1993 Vulcan sedan (wife crashed) 1993 Vulcan wagon (beat up like Battlestar Galactica, drove to junkyard on a sad day) 1997 Vulcan sedan (down with multiple coolant leaks), 1998 Vulcan sedan (rescued from being junked three time with broken brake lines and bad rack, hydrolocked engine replaced ) down for now
Note: wives and daughters are dangerous to your Taurus health!

If Spock drove a Taurus it would be a Vulcan
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post #5 of 6 (permalink) Old 06-26-2012, 12:04 AM
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Quote:
Originally Posted by saccomarx View Post
That gives me some good info and places to check. I believe I checked fuse 5 already, but I may have got the wrong one, as the owners' manual numbers are not listed on the fuse box, or maybe I'm just reading it wrong.
I think the fuse numbers are molded into the inside of the fuse box cover. If not, you'll have to take your owner's manual with and compare.
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post #6 of 6 (permalink) Old 06-28-2012, 10:04 PM Thread Starter
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It works!!

Thanks to all for your help, i checked the fuses, well, all of the 5 amp fuses anyway, and found the radio fuse was blown. This would have been obvious if the car had a radio! Speedometer works now. Seems that this is maybe fuse 5, or fuse 24? The owners manual has about 3 fuses listed for the instrument panel, the fuse box lists 2 different ones for the radio, one radio and one radio memory. Confusing to say the least. The fuse marked radio in the manual is fuse 8.

The embarassing part is that this fuse blew in my '96 Duratec Sable, which killed the speedo too! That was over a year ago and I forgot all about it.

Thanks again for the posts, I printed out the diagrams and added them to my pile of car info, although I hope I don't need them again!
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