- Problem: The battery lost charge whenever the car sat for a while, and the audio system was acting up at the same time. Two faults appearing together suggested a single source.
- Fix: Checked the circuits that feed the audio system one at a time, isolated the factory CD changer, and confirmed with a meter that the excess current draw went away when the changer was out of the circuit.
- Tools: Digital multimeter, factory wiring diagrams.
- Result: The failed CD changer was confirmed as the source of the drain. The repair is in entry 03.
ongoingMarch 2026 – Present
Automotive diagnostics & mechanical repair
Accord repair log
Ongoing repair log for a 2003 Honda Accord: a parasitic drain traced to the factory CD changer, a dashboard and factory-radio teardown to bypass it, battery monitoring and replacement, a knock sensor, a power-steering flush and more.
- Vehicle
- 2003 Honda Accord
- Started
- March 2026
- Entries
- 8
Last updated
Overview
This is a working log for my 2003 Honda Accord. The largest job was a battery that kept going flat overnight while the stereo misbehaved; both symptoms turned out to share one cause, a failed factory CD changer. Every entry below uses the same four headings — problem, fix, tools, result — so each repair can be read on its own. Work done before I started dating entries is listed as March 2026.
Log
- Problem: The factory radio and CD changer are buried behind the dashboard trim and center console, so nothing could be tested or disconnected without taking the dash apart.
- Fix: Tore down the dashboard and center console and pulled the factory radio, keeping fasteners and connectors organized by location so reassembly would be straightforward.
- Tools: Basic hand tools (exact list to be added).
- Result: Full access to the radio, the changer and their harness connectors.
- Problem: The factory changer had failed and was behind both the audio fault and the drain. Replacement units for this car are long out of production, so repairing it wasn’t worthwhile.
- Fix: Identified each connector and pin against the factory diagrams, then removed the changer from the circuit. Took care not to disturb neighbouring circuits.
- Tools: Factory wiring diagrams, digital multimeter.
- Result: Changer out of the circuit and the drain gone. I’m still keeping an eye on the bypassed circuit.
- Problem: With the changer bypassed, the car still needed a working radio.
- Fix: Installed an aftermarket head unit in place of the factory radio, wiring it to the pinout mapped in entry 03.
- Tools: Factory wiring diagrams, basic hand tools (exact list to be added).
- Result: Audio working again.
- Problem: After repeated deep drains, the battery’s health was doubtful.
- Fix: Monitored and tested the battery, then replaced it.
- Tools: Digital multimeter.
- Result: New 12 V battery installed.
- Problem: The knock sensor needed replacing (symptoms and trouble code to be added).
- Fix: Removed the old sensor and fitted a new one.
- Tools: Basic hand tools (exact list to be added).
- Result: New knock sensor installed.
- Problem: The power-steering fluid needed a full flush, and I didn’t have a fluid-exchange machine.
- Fix: Put together a temporary extraction pump from a shampoo-bottle pump head, plastic tubing and a soda bottle, and used it to draw out the old fluid during the flush.
- Tools: Improvised pump (pump head, tubing, bottle).
- Result: A complete flush with no special equipment. Fine as a one-off; not meant to be a permanent tool.
- Problem: The brake pedal made no click when pressed or released. That pointed at either the shift interlock at the shifter or the brake light switch.
- Fix: Confirmed the switch was at fault, picked up a replacement from NAPA, removed the old switch and installed the new one. Roughly 15 minutes of work.
- Tools: Basic hand tools.
- Result: New brake light switch installed.
What’s next
- Keep monitoring the circuit where the changer was bypassed.
- Log new issues as they come up, using the same format.
- Add photos of the work as they’re taken.