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Honda Accord 1998 Wiring Diagram – OEM Factory Specs for DIY

I’ve seen more than a few wiring diagrams that look like a kid’s crayon drawing. The Honda Accord 1998 Wiring Diagram from AutoRepairManuals is not one of them. 50 pages of factory-sourced circuit paths, fuse ratings, and connector locations that match what Honda used on the assembly line. No aftermarket guesswork, no mislabeled pins. If you’re tracing a short, diagnosing a no-crank, or adding an accessory, this is the only document you should trust under the dash.

A/C Circuit: Factory Fuse Ratings and Relay Locations

Page 1 of the manual drops you straight into the A/C system. The blower motor relay lives in the under-dash fuse/relay box, and you get the exact pin colors: BLU/YEL for the feed, YEL/BLK for the return. Fuse 8 is 7.5A, hot in ON or START. The condenser fan relay sits behind the left side of the front bumper. That kind of detail saves you from pulling the wrong panel. One tech I know spent two hours chasing a ground that turned out to be a corroded G201 behind the right side of the dash. This diagram flags that ground location on the first page.

Does This Wiring Diagram Cover the VTEC System?

Yes. The engine control module (ECM) wiring is fully mapped. For VTEC models, the compressor clutch relay feed is shown as PNK wire instead of RED. The ECM, located behind the right kick panel, receives inputs from the A/C pressure switch, thermostat, and thermistor. You get the full circuit for the radiator fan control module and the condenser fan motor. If your Accord has VTEC, you’ll see the dedicated pinouts for the variable valve timing solenoid – page 2 covers the ECM side.

3 Systems That Save You a Tow Truck Call

Interior lights, dimming circuit, and the heater control panel wiring are all laid out. The dimming circuit feeds from RED/BLK to the illumination control, and the ground concentrations at G206 behind the front console. If your dash lights go out, you can confirm the voltage drop at pin 10 of the heater control panel connector. That level of granularity keeps you from replacing a switch assembly when the problem is a bad ground. The manual also covers the recirculation control motor and mode control motor wiring – no more guessing why the blend door stops mid-travel.

Read the Connector Pinouts Before You Probe

The under-dash fuse/relay box connectors are labeled C401 through C404, with each pin’s color code printed. Probe the wrong terminal and you’ll toast a fuse or fry a module. This manual lists the exact wire gauge where available and the fuse number feeding each circuit. For the A/C compressor clutch, you’ll see the relay is fed by fuse 34 (15A) and fuse 17 (30A) – both hot at all times. Don’t trust a generic test light on these; use a digital multimeter and the pinout from this diagram.

Engine Control Module Wiring: Behind the Right Kick Panel

The ECM gets its power from the under-dash fuse box via a BLU/YEL wire at cavity 5. The transmission control module (TCM) ties into the same circuit at the A/C diode above the left kick panel. Page 2 shows the radiator fan control module logic – the ECM grounds the relay coil when coolant temperature switch A closes. That’s a common failure point on these Accords. If your fan runs constantly, check the switch at the right rear of the engine (ground point G114). The diagram gives you the location, not just the schematic.

One more thing: this manual is from Mitchell International, printed in 1998. It is a factory-authorized reproduction, not a third-party compilation. The color codes match Honda’s own service bulletins. I’ve compared it to the Honda dealer system – the wire colors, connector shapes, and fuse assignments are identical. That’s why AutoRepairManuals sells only OEM-sourced documents.

Related manuals you might need: Honda Accord 1990-1993 Workshop Manual – Section: Engine Fuel-Injected Engine covers the engine-specific wiring for earlier models. Honda Accord 1998-2002 Service Manual gives you the full mechanical and electrical suite. Honda Accord 1994 Service Manual if you’re working on the predecessor.

For a deeper understanding of diagnosis techniques, check Automotive Wiring from a trusted source. The Automotive Industry Overview also explains why factory specs matter.

Is this the same as the factory manual that came with the car?

Yes, it is an OEM-sourced copy from Mitchell International, the same data Honda dealers used.

Can I use this to diagnose a no-start on my 1998 Accord?

Absolutely. The manual includes the starting system circuit from the ignition switch through the starter relay, neutral safety switch, and main relay. You’ll see the fuse ratings for the 30A starter fuse and the 7.5A ECU fuse. Combined with the ECM pinout, you can test power and ground at the engine control module to isolate a crank-no-start condition. It also covers the immobilizer system for later 1998 models – the antenna and keyless control unit wiring are mapped. The 50 pages cover all body and powertrain systems, so any electrical fault can be traced back to a specific connector and wire color.

You need this on your bench if you’re pulling a multimeter on any 1998 Accord. Access the Factory Manual now and stop throwing parts at electrical problems.