Westerbeke — Bridge Rectifier Test Procedures
Testing & diagnosis
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
- Remove the main rotor DC connection at the ground or at the soldered DC output (red dot).
- Set ohmmeter on low scale Rx1.
- Connect plus lead to DC lead (red dot); contact points 1,2,3,4 with negative; no deflection should occur.
- Reverse connections; contact points 1,2,3,4 with plus; half to three-quarter scale deflection should occur.
- Points 1,2,3 read 8-9 ohm; point 4 reads 30-40 ohm.
- If readings between points 1,2,3 vary, remove rectifier and test independently.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Points 1,2,3 (8-9 ohm)
- Point 4 (30-40 FridayParts $40.00 ohm)
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.