Relay and timer (Engine management system - EDC)

Relay and timer

Glow plug tester DX900 illustrated

1. Switch off master switch and disconnect leads from glow plugs.
2. Connect RED lead to glow plug supply lead. Connect BLACK lead to battery ’-’ negative.
3. Connect YELLOW lead to terminal of spare glow plug fitted in top of tester.
4. Press and hold test button while switching on the master switch.
5. Note ammeter readings, after initial current draw of 25 amps the reading should stabilise and drop to zero when the timer switches off.