Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1985 BMW 524tdFACTORY OEM SERVICE PROCEDURE
Glow Plug Resistance Test
- Remove glow plug control module cover. Remove large connector from module. Connect one lead of ohmmeter to ground and other lead into each terminal of large connector.
- Resistance of each glow plug should be .3-.6 ohms. If resistance is correct, go to GLOW PLUG MODULE TEST.
- If an open circuit condition exists, replace glow plug. If resistance is not within specifications (after replacing a bad plug), wiring between module and glow plug must be replaced.
NOTE:
Prior to glow plug installation, coat glow plug threads with anti-seize compound.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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