Ford — Generator Output Test
Testing & diagnosis
From a Ford service manual — check it applies to your exact model before use.
Browse Ford generators & specs →
Procedure
- Switch the tester to ammeter function.
- Connect the positive and negative leads of the tester to the battery.
- Connect current probe to generator B+ output lead Circuit 38 (BK/O).
- With the engine running at 2000 rpm, adjust the VAT-40 or equivalent load bank to determine generator output.
Tools required
- Rotunda Starting and Charging System Tester 078-00005 (VAT-40) or equivalent
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Engine running at 2000 rpm
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.