neohic Posted October 20, 2013 Share Posted October 20, 2013 My speedometer doesn't work in my '91. Everything was working before I started swapping everything over to the new chassis and everything worked when I moved it all over in late June. I made sure that the speedo gear is aligned correctly and... from my high beams thread... made sure that everything was plugged in that I can see. From what I remember, the only electrical connections are starting at the gear housing, then another at the firewall by the blower motor, then the last behind the cluster. The truck just has dummy lights and the giant fuel gauge, and the rest of them all work. I tried taking out the gear housing and spinning with a drill without any luck as well. Any other ideas? Thanks guys. Link to comment Share on other sites More sharing options...
1987Comanche Posted October 20, 2013 Share Posted October 20, 2013 VSS probably went out. Georgia's died a few weeks ago. It's super easy to change and I picked one up on e-bay for $15. Link to comment Share on other sites More sharing options...
neohic Posted October 21, 2013 Author Share Posted October 21, 2013 Anyone know if there's a way to test the sensor? Link to comment Share on other sites More sharing options...
HOrnbrod Posted October 21, 2013 Share Posted October 21, 2013 Have you checked for codes? 15 is the VSS circuit. http://comancheclub.com/topic/28111-reading-obdi-91-and-92-mj-fault-codes/ Link to comment Share on other sites More sharing options...
neohic Posted October 21, 2013 Author Share Posted October 21, 2013 Have you checked for codes? 15 is the VSS circuit. http://comancheclub.com/topic/28111-reading-obdi-91-and-92-mj-fault-codes/ I have not. On the docket for tomorrow. Wouldn't that turn on the "check engine" light if ti was bad? Link to comment Share on other sites More sharing options...
Automan2164 Posted October 21, 2013 Share Posted October 21, 2013 Ben, the sensor was going out on my old '91 Eliminator when I was in high school. A quick few slaps on the sensor with the back of a medium sized screwdriver always got it fired up again... Never replaced it, just gave it a tap every now and then. Give it a tap and see if it comes back. Rob Link to comment Share on other sites More sharing options...
neohic Posted October 21, 2013 Author Share Posted October 21, 2013 ... A quick few slaps on the sensor with the back of a medium sized screwdriver always got it fired up again... I'll give that a try. My kind of maintenance... the percussive kind! Link to comment Share on other sites More sharing options...
HOrnbrod Posted October 21, 2013 Share Posted October 21, 2013 The VSS feeds the speedo, and the ECU. It's just a rotating reed switch that makes/breaks continuity based on it's RPM. You can pull it, turn it by hand, and check them with a meter, analog is best. It will not throw the "check engine" light either on an OBD1 system. At least not on mine. See if you have a code 15 first. Link to comment Share on other sites More sharing options...
1987Comanche Posted October 21, 2013 Share Posted October 21, 2013 The only symptom I had on Georgia was the speedo intermittently dropping out (going dead). No codes, no drivability issues. Link to comment Share on other sites More sharing options...
HOrnbrod Posted October 21, 2013 Share Posted October 21, 2013 What's Georgia? Renix? If so, doesn't apply. Link to comment Share on other sites More sharing options...
1987Comanche Posted October 21, 2013 Share Posted October 21, 2013 She's my '92 4.0HO AX-15 2WD... http://comancheclub.com/topic/37173-georgia-92-40-ho-ax-15-2wd/ Link to comment Share on other sites More sharing options...
Oyaji Posted October 21, 2013 Share Posted October 21, 2013 Take the sensor/sender off and look at the square hole in it, and at the square stub end of the gear shaft that drives it. If either are rounded off, you can either replace them, or just do what I did: whittle a finely-tapered wooden shim, shove it into the square hole, then reassemble. I have had to do that twice: once at 190,000 and again at 285,000 miles - has worked just dandy. Link to comment Share on other sites More sharing options...
HOrnbrod Posted October 21, 2013 Share Posted October 21, 2013 She's my '92 4.0HO AX-15 2WD... http://comancheclub.com/topic/37173-georgia-92-40-ho-ax-15-2wd/ Applies. :thumbsup: Link to comment Share on other sites More sharing options...
neohic Posted October 22, 2013 Author Share Posted October 22, 2013 Hmm... no dice on the engine codes. I got a 12 and 55. Nothing from smacking the sensor around either. What's next on the list to try? Can I hit anything else? Link to comment Share on other sites More sharing options...
HOrnbrod Posted October 22, 2013 Share Posted October 22, 2013 Well, you can always beat on the speedo. :yes: Continuity testing time from the VSS to speedo, if good pull the VSS and check it for make/break with an analog ohmmeter. That being said, I had to finally replace mine as 1987Comanche did for intermittent speedo operation. Didn't throw a code either. http://www.ebay.com/itm/NEW-1987-97-JEEP-CHEROKEE-XJ-WITH-AW4-TRANSMISSION-REPLACEMENT-SPEED-SENSOR-/190857033371?pt=Motors_Car_Truck_Parts_Accessories&hash=item2c6ff7369b&vxp=mtr Link to comment Share on other sites More sharing options...
neohic Posted October 22, 2013 Author Share Posted October 22, 2013 http://www.ebay.com/itm/NEW-1987-97-JEEP-CHEROKEE-XJ-WITH-AW4-TRANSMISSION-REPLACEMENT-SPEED-SENSOR-/190857033371?pt=Motors_Car_Truck_Parts_Accessories&hash=item2c6ff7369b&vxp=mtr Wait... what? Not at all what I have in the transfer case. :hmm: Link to comment Share on other sites More sharing options...
HOrnbrod Posted October 22, 2013 Share Posted October 22, 2013 It's on the AW4, left side. On the 4WD adapter unit in your case. Link to comment Share on other sites More sharing options...
neohic Posted October 22, 2013 Author Share Posted October 22, 2013 It's on the AW4, left side. On the 4WD adapter unit in your case. Hmm... can I hit that too? Link to comment Share on other sites More sharing options...
Oyaji Posted October 22, 2013 Share Posted October 22, 2013 http://www.ebay.com/itm/NEW-1987-97-JEEP-CHEROKEE-XJ-WITH-AW4-TRANSMISSION-REPLACEMENT-SPEED-SENSOR-/190857033371?pt=Motors_Car_Truck_Parts_Accessories&hash=item2c6ff7369b&vxp=mtr Wait... what? Not at all what I have in the transfer case. :hmm: . Me neither! . This ain't 'zack'ly what I got, but it is near enough to get the idea across - it's the square hole that was wallowed out and where I shoved that finely-tapered hand-whittled wooden shim I mentioned in my earlier post: . . . Square peg was somewhat rounded off too - made never-no-mind a difference with the shim wedged in between the shaft and square mating hole: . . . Link to comment Share on other sites More sharing options...
neohic Posted October 26, 2013 Author Share Posted October 26, 2013 Took the truck for a drive today and the speedometer still doesn't work... even after smacking around on things underneath. I came back and tested for codes and I did get a "15" this time. That sensor looks like a real bugger to get to! :( Link to comment Share on other sites More sharing options...
neohic Posted October 26, 2013 Author Share Posted October 26, 2013 Anyone have any tips on an easy way to replace the sensor? Crawled under it today and just looked at it for a while... decided I'd work on something else. :ack: Link to comment Share on other sites More sharing options...
Oyaji Posted October 26, 2013 Share Posted October 26, 2013 Takes me 1 minute with channel-lock pliers... but I have a feeling my sensor is different from what you have. Link to comment Share on other sites More sharing options...
1987Comanche Posted October 27, 2013 Share Posted October 27, 2013 2WD AX-15 VSS is dead simple. I used a big adjustable wrench to break it loose and cleaned everything while I was there. Took 15-20 minutes to do everything. This is my VSS: http://www.ebay.com/itm/1989-1993-Chrysler-Dodge-Jeep-Vehicle-Speed-Sensor-/330703041948?pt=Motors_Car_Truck_Parts_Accessories&fits=Year%3A1992|Make%3AJeep&hash=item4cff6ff59c&vxp=mtr Link to comment Share on other sites More sharing options...
neohic Posted October 27, 2013 Author Share Posted October 27, 2013 No, no, no... this one: Link to comment Share on other sites More sharing options...
92tanMJ Posted October 27, 2013 Share Posted October 27, 2013 Hmm mine on my 92 is starting to not work :fs2: And that doesnt looks fun to change Link to comment Share on other sites More sharing options...
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