Westerbeke — Voltage Regulator Function Test
Testing & diagnosis · voltage regulator board
From a Westerbeke service manual covering: WTA 15, WTA 20, WTA 25, WTA12KW, WTA15KW, WTA16KW, WTAl5KW. Check it applies to your exact model before use.
Procedure
- Check the voltage regulator on an alternator known to be operating O.K.
- Alternatively apply 9 volts DC to the exciter field (generator plug #1 pin + and common ground stud -).
- This should produce 120 volts AC output from each lead T1 and T4 under no-load conditions.
- Replace the voltage regulator board with a new piece to accomplish the same.
Tools required
- 9 VDC power source Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 9 volts DC to exciter field produces 120 VAC no-load
Source: Westerbeke 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.