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Old 03-02-2008
Dave Diamond Dave Diamond is offline
Junior Member
Join Date: Jan 2008
Location: Picayune
Posts: 9
Default AT545 speedometer signal

I am trying to finish up a project where i swapped an allison 2400 series transmission to replace an AT545 in my 1999 blue bird TC 2000. I don't have a schematic and cannot get to the back of my speedometer without extreme difficulty and i need to know which lead to use for a speedo signal. i hope to send the speedo signal from the 2400 computer to the speedo via the return wire from the old tailshaft terminal in the existing wiring harness. my AT545 tailshaft terminal is a four pin terminal but only the A and B pins were used. with the ignition switch on, both the A and B pins read 2.39 volts. I want to get it going but don't want to blow up my speedo or my trans computer by hooking to the wrong wire. thanks, Dave Diamond
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