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Jeep Wrangler YJ
YJ General Discussion
Speedometer
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<blockquote data-quote="deadpool1" data-source="post: 439639" data-attributes="member: 21229"><p>the FSM shows all you need to know here. VSS , vehic speed sensors.</p><p>the 93 (same as 92/?) has electronic dash speedometer</p><p>so fuses are first not wires and gears first;. F9 is it but tacho dies too.</p><p>fuses. related must be good first. </p><p>is tachometer dead then fuse 9 to cluster pin 19 is blown</p><p>VSS cluster is pin 13, it is PULSES per rear prop shaft turns</p><p></p><p>now sheet 11, fsm yj</p><p>is wiring to the box vss</p><p>i will post that now.</p><p>Vss plug has 3 pins, 1 power, 1 grounds and pulses out,, the power pin is also crank sensor power , if dead engine is dead 100%</p><p>vss runs off 8vdc power output of PCM but we know that is good ,engine not dead.</p><p>the 8v and ground must good to VSS</p><p>if is,then it does pulse</p><p>if not the sensor is bad or pin 1 grounded out.called G7 hear.</p><p>if sensor is good, then 1 of 2 plastic gears are stripped out.</p><p>if G7 does pulse then kick panel connector below is bad G7 pin bad.</p><p>[ATTACH=full]121888[/ATTACH]</p><p>i think I got them the all ,ways to fail here ,speedo good)</p><p>recap.</p><p>vss orange pin 8vdc K7 pin</p><p>center pin, BK/LB black + light blue call K4, and is 0vdc ground.</p><p>K7 pin , wt/or , white with orange strip, out.put, pulses.( do no get near prop shaft if doing live on jack/lift tests. do not.)</p><p>one of the 3 are bad. simple tests prove it.</p><p>using voltmeter on 8v and ground pin.</p><p>I have a scope and need not guess. I can probe them all.</p></blockquote><p></p>
[QUOTE="deadpool1, post: 439639, member: 21229"] the FSM shows all you need to know here. VSS , vehic speed sensors. the 93 (same as 92/?) has electronic dash speedometer so fuses are first not wires and gears first;. F9 is it but tacho dies too. fuses. related must be good first. is tachometer dead then fuse 9 to cluster pin 19 is blown VSS cluster is pin 13, it is PULSES per rear prop shaft turns now sheet 11, fsm yj is wiring to the box vss i will post that now. Vss plug has 3 pins, 1 power, 1 grounds and pulses out,, the power pin is also crank sensor power , if dead engine is dead 100% vss runs off 8vdc power output of PCM but we know that is good ,engine not dead. the 8v and ground must good to VSS if is,then it does pulse if not the sensor is bad or pin 1 grounded out.called G7 hear. if sensor is good, then 1 of 2 plastic gears are stripped out. if G7 does pulse then kick panel connector below is bad G7 pin bad. [ATTACH type="full" alt="vss1.JPG"]121888[/ATTACH] i think I got them the all ,ways to fail here ,speedo good) recap. vss orange pin 8vdc K7 pin center pin, BK/LB black + light blue call K4, and is 0vdc ground. K7 pin , wt/or , white with orange strip, out.put, pulses.( do no get near prop shaft if doing live on jack/lift tests. do not.) one of the 3 are bad. simple tests prove it. using voltmeter on 8v and ground pin. I have a scope and need not guess. I can probe them all. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Speedometer
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