Volvo RWD 700 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 10/2018 700 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

Testing speedometer sensor with ohm meter 700

posted by  740man on  Tue Oct 1 18:22 CST 2002
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

I tested the ohms between the two terminals at the speedo sensor in my 86 740 and I get 0.00 ohms. I had heard that the value should be 600 to 1600 ohms. Is that correect? What does this indicate if I get no resistence at all? A shorted sensor?








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Testing speedometer sensor with ohm meter 700

    posted by  someone claiming to be Doug Bostrom on  Wed Oct 2 05:41 CST 2002 [RELATED]

    I don't know the correct range for the speedometer sensor coil, but if you've got your ohmmeter set to a low ohms range (x1, x10) and you're seeing 0 ohms that is indeed a dead short.








    •   REPLY TO THIS MESSAGE    PRINT   SAVE 

      Testing speedometer sensor with ohm meter 700

      posted by  740man on  Wed Oct 2 15:18 CST 2002
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

      Well, now that I know it is shorted, has anyone ever taken a sensor out out of the diff? I can see from a picture of the new one that it seems to be pressed in and just has a sealing o-ring. I guess now might be a time to take off the diff cover and regasket. Doesn't look like it has been touched ever.
      '86 740> shakedown cruise.








      •   REPLY TO THIS MESSAGE    PRINT   SAVE 

        Testing speedometer sensor with ohm meter 700

        posted by  someone claiming to be Anton on  Thu Oct 3 08:48 CST 2002 [RELATED]

        Just remove the scruve and pull the sensor out. ( It's VERY unusual with sensor problems, but I guess you tested it the right way.)








        •   REPLY TO THIS MESSAGE    PRINT   SAVE 

          Testing speedometer sensor with ohm meter 700

          posted by  740man on  Thu Oct 3 14:02 CST 2002
          Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

          What is a scruve? Do you mean the wire plug? This problem is really driving me crazy. I got the feeling that I am going to get an (apparently) good sensor from the junkyard and it still won't work. I am tempted to just pull off the diff cover and give it a good look, change the gasket and the prop seal (which is leaking)
          And make sure everything looks ok. By the way I was getting this burned wire smell in the cockpit and couldn't figure it out. It turned out to be a plastic bag that got stuck to my front muffler and was melting!!!!!(the best possible scenario) Got to rehang those mufflers!!!!!!!








    •   REPLY TO THIS MESSAGE    PRINT   SAVE 

      Testing speedometer sensor with ohm meter 700

      uid 7350's pic
      posted by  Cliff8928 on  Wed Oct 2 13:37 CST 2002
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS] [RELATED]

      You sure you test for resistance on a Volvo VSS? I guess I'm just used to my GM cars where they produce AC Voltage when the car moves....

      Cliff Scott
      89 740 16v <-never had a speedometer problem







<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.