Ford — Bench Tests - Starter No-Load Test
Testing & diagnosis · Starter motor
From a Ford service manual — check it applies to your exact model before use.
Browse Ford generators & specs →
Before you start
- Make sure that the starter is securely mounted in bench vise while energizing, as starter will move or jump.
Procedure
- Connect Rotunda Starting and Charging Tester 078-00005 or equivalent cables to starter, large enough to carry high current (the same as in the vehicle). The starter will run at no-load.
- Be sure that no current is flowing through ammeter (rheostat at maximum counterclockwise position). Determine exact reading on voltmeter.
- Stop cranking engine, and reduce resistance of carbon pile until voltmeter indicates same reading as that obtained while starter cranked the engine. The ammeter will indicate starter no-load current d
- Refer to Specifications for a comparative value.
- If current exceeds specification, check for rubbing armature, bent shaft, binding bearings, or shorts in armature, or brush assembly.
Tools required
- Rotunda Starting and Charging Tester 078-00005 or equivalent Amazon
- carbon pile rheostat Amazon
- voltmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Ford service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.