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94 Caravan 3.0L Speedometer Problems.

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Old Jan 25, 2010 | 01:06 PM
  #11  
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Wow!!! Glad thats solved, hopefully..................Good Luck.
 
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Old Jan 25, 2010 | 05:38 PM
  #12  
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Okay, so I changed the Gear with a brand new one from the dealer, Still no luck, Speedo works for the first 5min, then cuts out. What else could i be missing.

Swapped out the computer
New Speed sensor
New Gear for speed sensor.
also replace the dashboard computer (PCM and BCM)

Could the console be going bad on me ? I also have a spare one , but don't really feel like tearing the dashboard apart to change it.

Also, could the gear inside the Transmission that hits the speedo gear have gone bad on me ?

Only other thing i could think is, The wires in the wiring harness have gone bad...
Any one have the pin outs at the computer so i can run 3 new wires ?
 
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Old Jan 25, 2010 | 08:40 PM
  #13  
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gear in the transmission is the axle shaft and it's metal. Again why are you throwing parts at it instead of using proper diagnosis? If you had a real scanner, you could just plug into the data connector and read off the scanner what the PCM is seeing from the speed sensor. The problem solving logic is: if the pcm is receiving a good signal then the problem is between PCM and Cluster, if the PCM loses signal, then the problem is the sensor to PCM. You could also use a DVOM to measure voltage created with the speed sensor back probing the leads into the PCM harness for speed sensor circuit. Oh and do you need a clue on how you can do this without moving the vehicle?
 
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Old Jan 25, 2010 | 09:00 PM
  #14  
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You two guys need to start taking to the next level. To the pm.YuNVme I sent you a pm already. Read it.
 
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Old Jan 25, 2010 | 09:22 PM
  #15  
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I'm wondering why you or Tizzy haven't posted the wiring diagram he's been asking for? I have it but can't post it... Shopkey won't let me unless I print, then scan then post and I don't have that capacity.
 
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Old Jan 25, 2010 | 09:59 PM
  #16  
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I don't cut and paste like tizzy, but if he wants the wiring diagram. All you have to do is ask and i'll send by email. Just need your email address.
 
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Old Jan 26, 2010 | 10:00 AM
  #17  
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dont look like nobody is gonna help the man wiht pin info so heres what i got 47 or/wite wire is sig wire from senser. pin4 is sig return ground wire for the sensers and pin 7 is orange and is 8v to sensers. so if i was fixin yalls car id use the drill like the man say then use a meter to see whats at pin 47 probe that wire then see what happens.
 
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Old Jan 27, 2010 | 05:56 PM
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I didn't post it because he wanted to rewire the sensor and I told him other sensors splice into the circuit so rewire really isn't an option.
 
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Old Jan 27, 2010 | 07:30 PM
  #19  
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The fact of the situation is that the sensor output wire is dedicated, the low voltage supply is spliced as is signal return. But I think I gave more than enough ways to diagnose the problem without hacking the wire harness... and then he gets into a 'tizzy' pun intended
 
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Old Jan 27, 2010 | 07:37 PM
  #20  
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enough, the wiring has been send.
 
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