Perkins 403F-11 — Engine Oil Pressure Switch - Test
Testing & diagnosis
For the Perkins 403F-11, from the Perkins service manual.
Applies to: Perkins 403F-11
Procedure
- Turn ignition switch ON without starting engine; oil pressure lamp should turn on for 0.5 seconds.
- If lamp does not turn on, check electrical circuit, switch and bulb.
- Remove switch from cylinder block and disconnect wiring harness connector.
- Use a 12 V battery and digital multimeter in series to measure current.
- Replace switch if current is greater than 0.42 A.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 0.30 to 0.40 A
- greater than 0.42 A replace
Source: Perkins 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.