This means the tester will not damagesensitive electrical systems.A multimeter or continuity tester can also be used by setting the tester to the Ohms setting andconnecting one probe to the negative battery terminal and probing the previously located wires.With the door open, operate the door latch with the door handle to open the latch. The important thing about this kind of tester is that it isspecifically designed to be “computer and air bag safe”. There are othermanufacturers of similar testers. With the door closed the circuit will sometimes show a very small amount of current ornothing at all.The best and safest way to isolate this wire is to use a computer safe circuit tester like theCTS24 Circuit Tester by Blue Point available from Snap On Tools. Negative switching indicates that the circuit will be in a “ ground “ state where the circuitis connected to the minus or negative side of the battery with the door open (Except 02 – 03Ford Super Duty and 08 Ford Super Duty where the circuit is closed to ground with the doorshut). This circuit will be a “negative switching”circuit. Once you have located the bundle of wires that go to theswitch you will need to isolate the door-ajar circuit. You can find this circuit by removing the door panel and physically tracing the wiresleading to the door latch / switch. The wire that we need locate is the factory door-ajar signal located inside eachdoor.
Whatdo I do?A: Unfortunately vehicle manufactures frequently change the color of the wires in their wiringharnesses. Trouble Shooting Guide – Frequently Asked QuestionsQ: The wire colors on my vehicle do not match the colors in your diagram. (Swap orange and white wires in motor plug.)TECH SUPPORT 1-88 Monday – Friday 8:00 AM – 5:00 PM PST | of 7 Exchange location of wires goingwhen closing door into motor plug. Replace clutchbe heard running assembly.Step go up when opening door and down Motor polarity reversed. Replace clutch assembly.Steps operate randomly Diodes connected in reverse polarity or faulty diode Connections not secure Connected to incorrect wire in vehicle electrical systemStep stays down all the time and motor can Tolerance ring / clutch assembly faulty. Tolerance ring / clutch assembly failed / failing. Re-install step extrusion to lowerSteps make a ticking noise when fully mount and ployed or fully retracted and motorcontinues to run. Trouble Shooting Guide – AMP Research Power StepTable Of Contents:1) Trouble Shooting Quick Guide2) Frequently Asked Questions3) System Operation Information4) Knowledge Base5) Trouble Shooting Flow Chart6) Flow Chart NotesTECH SUPPORT 1-88 Monday – Friday 8:00 AM – 5:00 PM PST | of 7Ĭoncern Possible root-causesSteps inoperative Factory door ajar switch in-op? Fuse burned Diodes connected in reverse polarity or faulty diode Connections not secure Connected to incorrect wire in vehicle electrical systemIntermittent operation Connections not secure Faulty diode or connection Bad groundOne or more doors deploy the step, others Diodes connected in reverse polarity or faulty diodedo not Connections not secureSteps shake and/or shutter during operation Bad ground Connections not secureDelay in step operation or steps deploy after Diodes connected in reverse polarity or faulty diodedoors have been closedSteps make a creaking noise during Tighten wedge bolt.operation Loosen lower mount bolts and remove step extrusion from lower mount.
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