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  1. M

    VDO speedometer & Acewell speed sensor

    Reporting in again. It's been a few days since I've had time to work on the Jackal/VDO/Acewell problem. Yesterday I pulled the tank off again, and sure enough, the +12v wire had dropped down and was at just about 90 degrees to one of the spark plug wires. I pulled it back up and wire tied it...
  2. M

    VDO speedometer & Acewell speed sensor

    And yet another update. I had attached the ground wire where the ignition unit is grounded. When I moved the ground to a different bolt, the symptoms changed. 1.) Upon calibration over a measured mile, the counter showed something near 4300 pulses, rather than 13,000. 2.) The speedometer...
  3. M

    VDO speedometer & Acewell speed sensor

    Time for another update. Operationally nothing has changed since my last update. It will now calibrate, but in operation the needle jumps all over. I have tried the following; 1.) Connected Pins 6 and 8 to the white wire from the Acewell S-4. 2.) Connected the +12v directly to pin 4 and the...
  4. M

    VDO speedometer & Acewell speed sensor

    Just a quick update. Late last night I put a meter on pin 2 and found that it does have power. I wired everything as shown in the schematic (without the jump from pin 8 to pin 6). This time I did get pulses from the Acewell, but the needle jumps all over the place after calibration. It seems...
  5. M

    VDO speedometer & Acewell speed sensor

    Thanks Iconicmug, I'm trying to put together a complete schematic, showing how to use the Acewell S-4 with a VDO speedometer. I spoke with someone in tech support who says they are all the same, except for size, trim, and face. I'm going to attach a schematic here, showing my next attempt...
  6. M

    VDO speedometer & Acewell speed sensor

    I have a 2000 Jackal. The factory speedometer stopped working at about 38,500 miles. I have purchased a VDO speedometer (437-750 I believe). It's the one that looks like a 1930's gauge. I also bought the Acewell ACE-S4, which installed on the back of the transmission without a hitch. I have...
  7. M

    Veglia-ITI Speedo Replacement Options

    I'm about to attempt the installation of a VDO speedo on my Jackal. The stock unit finally died after spending the last 15,000 miles bouncing wildly 10-15 MPH either side of what I was doing. Now it's stuck at 20 MPH all the time. Does anyone have a part number for the GM/Mopar sending unit...
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