HI, I have checked d3 diode.Its good.Infinity one way 7 14 the other.Ive even switched the diodes from one truck to the other.same problem happens. for/rev stops working.for/rev contactors dont close.get a code -48. Would it hurt to switch the rectifiers.Im not wanting to buy a new one,Then find out its not the problem.Their is 2 suppressors attached to the rec.Is their a way 2 check them?Could they cause a problem?Thanks Kent
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