How do you test a glow plug relay module?
How do you test a glow plug relay module? To test your glow plugs, simply connect a 12-volt test light to the positive battery terminal. Then disconnect the wires from each of your glow plugs and touch the probe of the test light to the terminal of the glow plug itself (not the wiring harness). Which is the best way to test glow plugs? The multimeter uses black (negative) and red (positive) leads to test electrical currency and resistance. These leads usually have metal clamps at the end of them. While the multimeter can seem daunting because of its many...