If you are triggering an msd 6 or 7 series ignition with its white wire or points terminal you will need the pn 8910 tach adapter the pn 8910 will correct the operation of most voltage triggered tachometers or fuel injection systems that do not work directly off the tach output terminal of the msd ignition unit. If you are using the magnetic pickup input green and violet wires to trigger your msd ignition you will need the pn 8920 tach adapter the pn 8920 will correct the operation of most voltage triggered tachometers that do not work directly off the tach output terminal of the msd control this adapter should also be used on current triggered tachs hooked in series with the ignition switch. Search xps 8910 documentation find articles manuals and more to help support your product what can we help you to find submit search top solutions manuals and documents regulatory information videos top solutions the most helpful knowledge articles for your product are included in this section see all black screen on monitor aw2518h when connecting to alienware aurora r5 aurora r6 xps . Msd tach adapter pn 8920 if your tachometer doesnt work correctly after installing an msd ignition control always try to connect the tachs trigger wire directly to the tach output of the ignition if the tach still registers incorrectly install this tach adapter. Tach adapter wiring using a rally pac with a msd ignition when using a rally pac or aftermarket tachometer with a msd ignition you need to use a tach adapter to prevent damage to the tachometer the following diagram shows how to wire the tachometer tach adapter and ignition together back to the tech articles please be advised that this information is for suggestion only and is based
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