B. Model Year 1981 and Later

Quick-Start Preglow System Test (DE-02.15)

B. Model Year 1981 and Later

Conventional Tools
Digital multimeter e.g. Sun Electric DMM-5

Wiring Diagram:

Tests

Preglow Indicator Lamp Does Not Light Up, But Engine Starts Normally.

Test:

Preglow Indicator Lamp Does Not Light Up. Engine Cannot Be Started.

Test - Part 1 Of 3:

Test - Part 2 Of 3:

Test - Part 3 Of 3:

Preglow Indicator Lamp Lights Up. Engine Is Difficult To Start.







Note:
It is possible, due to unfavorable tolerances, that the indicator lamp will indicate a faulty glow plug only after 2 glow plugs in cylinders 2 to 5 have failed.

To make sure that the failure indication circuit is not defective, disconnect 2 glow plug leads of cylinders 2 to 5 and repeat preglow procedure.

If the preglow indicator lamp indicates a fault (does not light up), the preglow time relay is in order.