Actron CP9087 Service Manual

Contents

Actron CP9087 Service Manual Manual pdf 84 page image

Section 44-2Continuity ChecksTest wiring, ground connections, switch operation, relay contacts, or similar.Important:• Do continuity tests on unpowered circuits only.• Always make sure all connections are good. If necessary, scrape awaycorrosion, paint, etc. at the contact points.Warning: If working on-car, turn ignition key OFF and observe all safetyprecautions (see page ii).1) Set RANGE switch to HIGH.2) Set FUNCTION switch to OHMS.3) Connect YELLOW test lead to one end of circuit (such aswire, switch or relay contact).4) Connect BLACK test lead to other end of wire, switch orrelay.RANGEHIGHLOWPOWER OFFFUNCTIONVOLTSOHMSFREQUENCY5) TEST light position indicatesamount of continuity.• All TEST lights OFF - Short Circuit(measured resistance is 200 ohms,or less).• Top TEST light ON - Open Circuit(measured resistance is 7 Kohms,or higher).Other TEST lights ON mean circuit hasresistance between 200 ohms and 7 Kohms.Low Resistance Checks• RANGE switch on LOW.• FUNCTION switch on OHMS.• Use YELLOW and BLACK test leads.All TEST lights OFF - resistance is 30 ohms, or less.Top TEST light ON - resistance is 300 ohms, or higher.Other TEST lights ON mean resistance is between 30 ohms and300 ohms.TEST TESTYellowShortcircuitYellowOpencircuitBlack BlackFUNCTIONVOLTSOHMSFREQUENCYRANGEHIGHLOWPOWER OFF