crankshaft sensor on 1994 Dodge Ram 2500

will not charge, tack does not work,trans does not shift correctly,friend read an article,said to check the crank sensor or engine speed sensor,how do you check

by in Jackson, MS on May 09, 2010
2 answers 1 comment
ANSWER by on May 09, 2010
alternator may be the reason for not charging, instrument cluster amy be an issue with the tac, assuming the truck runs, the shifting could be a tps sensor not sending proper signal to trans module. lot of problems at one shot. did they all fail together or over a period of time? the crank sensor is above the starter motor on the bottom drivers side of motor. Roy
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COMMENT by on May 13, 2010
Roy thanks for the try,but alt. puts out 32V. this is a deisel, so the crank sensor is above the balancer.Don't know if everything started at the same time,my dads truck.Also the a/c comp will not get power
ANSWER by on June 27, 2010
I had the same problem, replaced the crank sensor (engine speed sensor) and tach works, and alt charges. PCM needs engine speed input to turn on the alternator. It is located at the front of the engine, at the harmonic balancer. Also, make sure the air gap is correct when you change it. I used a matchbook cover.
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