|10-07-2013 10:19 AM|
|OverkillYJ||Yeah I have a late model YJ. Manufacture date of Dec 95, so needless to say it has some TJ parts on it. What I am talking about is where the vss harness goes into the main harness that cuts over to the PCM. You may have just had wear on the one wire, I definitely have wear on other wires. I could have spliced it in at the PCM, but I didnt have to for that wire. What I am going to do next is pull the VSS/Reverse light harness out through the engine compartment and open the whole thing up to see what is frayed. I will replace anything worn and pull it back through and hook it up. If that doesn't resolve it 100% then the rest of the problem remains over at the CPS where it meets the VSS wires. The reason I am thinking it may be in that area is that when I start the Jeep the speedometer revs up for a second with the RPMs.|
|10-07-2013 08:53 AM|
|Big Sarge||Is your Jeep not a YJ? Also not sure what you mean by coming into the main harness? I cut the wire at the VSS, cut same wire at the PCM, put new wire in (also in the black tube/protector) and re connected to both ends. Almost 4 months and have zero issues on mine.|
|10-07-2013 08:37 AM|
|OverkillYJ||Just to help other people with this problem. I did replace the one wire mentioned in this thread, but only up to where it comes into the main wiring harness. I didnt replace it through the main wiring harness because I know the wire would not be worn there. I opened up the main harness and everything still looked brand new. So after replacing the wire you mentioned up to that point it has gotten quite a bit better, but it is still not solved. I am now 90% certain that at least one of the other wires is worn. I assume the VSS works on resistance and that one of the wires is slightly exposed from rubbing and is grounding out causing the speedo to act crazy. Once I solve it for good I will update again. I probably wont get to it for a week or so though.|
|09-20-2013 09:55 PM|
|09-20-2013 09:23 PM|
|09-20-2013 09:05 PM|
|OverkillYJ||Awesome dude! I will be pulling the harness soon then and replacing that wire. I already have everything I need, now just need the time. After I do it I will try to remember to update this thread.|
|09-20-2013 07:18 PM|
|09-20-2013 06:31 PM|
Did that fix your problem? I am going crazy. I already replaced the speedo, and have spent hours under my Jeep thinking it was the sensor, or sensor related.
And what orange/white wire were you talking about? I know that may be a different color in mine since I have a different computer and cluster, but I can read wiring diagrams fine if I know what the wire is for.
|06-24-2013 12:14 PM|
Well it looks like I may have fixed the problem.
I cut the white with orange tracer wire near the PCM and near the VSS and just added in a new wire. Seems to have fixed the problem. Time wi tell I suppose.
|05-31-2013 08:21 AM|
|Big Sarge||Bumping for anybody else before I make my 4 hour drive today. Probably will need something to cover the cluster to avoid smashing it while having to watch the crazy speedo that long. Lol|
|05-30-2013 06:58 PM|
|Big Sarge||I can give it a shot but my connectors look very clean and are coated really good with dielectric grease. I won't completely rule it out (because I have no clue at this time) but it would be hard for me to comprehend it being isolated solely to the speedo. I do appreciate the insight though.|
|05-30-2013 06:54 PM|
|05-30-2013 06:49 PM|
|Big Sarge||Just wish that was my problem. I have found a plethora of used clusters for $50-$75. After swapping one in today it's not my issue so I won't waste that money.|
|05-30-2013 06:07 PM|
|05-30-2013 05:41 PM|
|Big Sarge||Any evening readers have any input?|
|05-30-2013 01:10 PM|
|mudmagnet63||Yeah Sarge I go from 0 to 90 in a flash. I hasn't done it in about a month so who knows. I feel for ya electrical gremlins suck|
|05-30-2013 01:03 PM|
I'm looking for a proper fix though not just duct tape it. Lol thanks though I did get a good laugh out of that one.
|05-30-2013 12:54 PM|
|mudmagnet63||Mine goes erratic sometimes. It will rock the house for a while then nothing for maybe a mile or 2 weeks. I just use duct tape.|
|05-30-2013 12:23 PM|
|Big Sarge||Swapped in a known good instrument cluster and nothing changes!!!! Someone please help before I go crazy. LOL|
|05-29-2013 06:35 PM|
Well I got said capacitor changed a couple weekends ago and problem still was there. I have changed the plugs, wires, distributor cap and rotor button as well as coil. All needed replaced anyways so no big loss there. But the speedo continues to do its own thing. Uggghhh
Waiting to catch my neighbor and swap in his cluster to see if my cluster went bad from the leaky capacitor.
|05-16-2013 06:26 AM|
|05-15-2013 11:34 PM|
If that does not fix it, try changing your spark plugs. Seriously.
Similar thing happened to me. Turns out my plug gaps were way too wide, and the spark was sometimes jumping across the coil instead of the plug. This caused a surge up the control wires to the PCM, where the circuitry for the speedo and coil are close by.
|05-15-2013 08:38 PM|
|05-15-2013 08:34 PM|
|flflash||Unfortunatly it looks like you may have found the problem, last one I had sent off and repaired cost $320 and took a week to get back. You may be able to get a rebuilt exchange unit thru your local dealer for about that price or run thru the legal issue's of putting a used one in from another vehicle.|
|05-15-2013 08:16 PM|
|05-15-2013 08:06 PM|
|flflash||Instrument panel cluster, if you feel comfortable pulling it out pull it out and look closely at the plug in the back. Was it fully inserted? ?s there any corrosion on it ( white to greenish powdery stuff ) the plugs on the back of the IPC are notorious about backing out or getting minor corrosion on them and causing issues. You can carefully and gently clean the connector and circuit board with electrical contact cleaner and see if it helps.|
|05-15-2013 07:48 PM|
|05-15-2013 07:41 PM|
|flflash||Thats normaly caused by a short across the printed circuit board on the back of the IPC. Has it been rained on lately?|
|05-15-2013 07:23 PM|
|Big Sarge||Bringing this thread back to life in hopes of some additional help. I was able to get complete wiring schematics from online. I looked through all the wiring and everything seems good to go. However my speedo is still acting crazy. It has almost gotten to the point now that it seems to react to the accelerator even sitting still meaning, I can be sitting still, rev the engine, and the speedo will jump up. Sometimes it does it without even revving the engine. I'm lost at this point. As stated before I have even disconnected the VSS and it still does it. With it disconnected I racked up 15 miles on my 10 mile commute to work!! Any help is appreciated.|
|04-29-2013 06:12 PM|
|Big Sarge||Does anybody have the wiring schematic for the speedometer? Cleaned the connections under the good today and thought it fixed it. After driving a little bit it started acting up again. I feel certain it is just a wire connection but need the schematic to trace it down.|
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