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.
Using An Ammeter With Current Measuring Probe
2004 Toyota Celica GT, StandardSECTION Using An Ammeter With Current Measuring Probe
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- Remove driver door ECU from driver door armrest. See DRIVER DOOR OR FRONT PASSENGER DOOR ELECTRONIC CONTROL UNIT under REMOVAL & INSTALLATION.
- Backprobing, connect current measuring probe of ammeter to driver door ECU 25-pin electrical harness connector terminal No. 25. Turn ignition on and place driver door power window switch in DOWN position. See Fig 2.
- Current flow should be about 7 amps as window is going down and increase up to about 14.5 amps or more when the window stops. If current flow is as specified, replace driver door ECU. If current flow is not as specified, replace power window motor.
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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.