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extech

Toyota Advanced Member
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Posts posted by extech

  1. yea i get it.  put tape on each wire. label them. disconnect them. find the one that has power with key on. if using a test light connect the clamp to battery power and the probe to the other wires.  one will light brightly. it goes to ground connection. the other wire goes to the sender connection. 

      with power on, touching the sender connection with the test light (clamp grounded) the gauge will go to full hot. 

     this tests the gauges ability to work. 

       the sender (if working) will make the gauge move based on it's resistance to ground

  2. ok. the gauge has 3 wires. one is power. check each wire with key on. one will show 0 one should be battery v, the other may be less.  disconnect either of the last 2. one of them will be battery v.  reconnect and connect the other wire to ground. the gauge should go to it's upper limit. thats the wire going to the sender on the transmission 

    if you connect your test light clamp lead to battery v  when you probe the ground connection it will light if the wire is actually grounded.    

      i know    clear as mud

  3. doug, you seem to be mistaken about how the toyota fan clutch works.  silicon doesn't get thicker with heat.  the front of the clutch has a bimetalic coil which changes passages inside to redirect the fluid to cause lock up. the temp it works at is kind of random, i think mostly due to age. new ones are really better than the ones originally installed 

  4. seeing if the pilot light is lit can be a real pain. i have a dometic fridg. that uses the prism to view the pilot.  i could never get my face in a place to see it. 

      i have a cheap inspection camera that works with my phone.   i turn the camera light off and hold it straight up at the viewing sight. when i push the starter button   i see the spark flash on my phone.  if the fire starts, pushing the button no longer shows the spark.  still can't see the flame but at least i know it was lit

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