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.
2003 Volvo S40FACTORY OEM SERVICE PROCEDURE
Electrical Component Locator: Splices
SPLICES LOCATION
| Component | Component Location |
|---|---|
| 43/300 | In body harness, under center of center console. |
| 43/301 | In body harness, under center of center console. |
| 43/302 | In body harness, under center of center console. |
| 43/303 | In body harness, under center of center console. |
| 43/304 | In body harness, under center of center console. |
| 43/305 | In body harness, under center of center console. |
| 43/306 | In body harness, under center of center console. |
| 43/307 | In body harness, under front of center console. |
| 43/308 | In body harness, under front of center console. |
| 43/309 | In body harness, under front of center console. |
| 43/310 | In engine compartment harness, center rear of engine compartment. See Figure . |
| 43/311 | In body harness, under front of center console. |
| 43/312 | In engine compartment harness, left rear of engine compartment. See Figure . |
| 43/313 | In engine compartment harness, left rear of engine compartment. See Figure . |
| 43/314 | In engine compartment harness, left rear of engine compartment. See Figure . |
| 43/315 | In engine compartment harness, center rear of engine compartment. See Figure . |
| 43/316 | In engine compartment harness, center rear of engine compartment. See Figure . |
| 43/317 | In engine compartment harness, center rear of engine compartment. See Figure . |
| 43/318 | In engine harness, at rear of engine. See Figure . |
| 43/319 | In engine harness, at left side of engine. See Figure . |
| 43/320 | In body harness, under center of center console. |
| 43/321 | In body harness, under front of center console. |
| 43/334 | In engine compartment harness, left front of engine compartment. See Figure . |
| 43/335 | In engine compartment harness, left front of engine compartment. See Figure . |
| 43/336 | In engine compartment harness, left front of engine compartment. See Figure . |
| 43/337 | In engine compartment harness, left front of engine compartment. See Figure . |
| 43/338 | In engine compartment harness, right front of engine compartment. See Figure . |
| 43/339 | In engine compartment harness, right front of engine compartment. See Figure . |
| 43/340 | In engine compartment harness, right front of engine compartment. See Figure . |
| 43/341 | In engine compartment harness, right front of engine compartment. See Figure . |
| 43/342 | In engine compartment harness, left front of engine compartment. See Figure . |
| 43/343 | In engine compartment harness, left front of engine compartment. See Figure . |
| 43/344 | In engine compartment harness, right front of engine compartment. See Figure . |
| 43/345 | In engine compartment harness, left front of engine compartment. See Figure . |
| 43/346 | In engine compartment harness, left front of engine compartment. See Figure . |
| 43/347 | In engine compartment harness, left front of engine compartment. See Figure . |
| 43/348 | In engine compartment harness, left front of engine compartment. See Figure . |
| 43/349 | In dash harness, behind left side of dash. |
| 43/350 | In dash harness, behind left side of dash. |
| 43/357 | In engine compartment harness, in engine compartment fuse & relay box. |
| 43/358 | In engine compartment harness, in engine compartment fuse & relay box. See Figure . |
| 43/359 | In engine compartment harness, in engine compartment fuse & relay box. See Figure . |
| 43/360 | In engine compartment harness, in engine compartment fuse & relay box. See Figure . |
| 43/361 | In engine compartment harness, in engine compartment fuse & relay box. See Figure . |
| 43/363 | In engine compartment harness, in engine compartment fuse & relay box. See Figure . |
| 43/365 | In engine compartment harness, in engine compartment fuse & relay box. See Figure . |
| 43/366 | In engine compartment harness, left rear of engine compartment. See Figure . |
| 43/371 | In engine compartment harness, in engine compartment fuse & relay box. See Figure . |
| 43/373 | In body harness, under front of center console. |
| 43/376 | In body harness, under center of center console. |
| 43/377 | In body harness, under center of center console. |
| 43/378 | In body harness, under center of center console. |
| 43/379 | In body harness, under center of center console. |
| 43/381 | In body harness, under front of center console. |
| 43/382 | In body harness, under front of center console. |
| 43/383 | In body harness, under front of center console. |
| 43/400 | In dash harness, behind right side of dash. See Figure . |
| 43/401 | In dash harness, behind right side of dash. See Figure . |
| 43/402 | In dash harness, behind left side of dash. See Figure . |
| 43/403 | In dash harness, behind right side of dash. See Figure . |
| 43/404 | In dash harness, behind left side of dash. See Figure . |
| 43/405 | In dash harness, behind center of dash. See Figure . |
| 43/406 | In dash harness, behind center of dash. See Figure . |
| 43/407 | In dash harness, behind center of dash. See Figure . |
| 43/408 | In dash harness, behind center of dash. See Figure . |
| 43/409 | In dash harness, behind center of dash. See Figure . |
| 43/410 | In dash harness, behind center of dash. See Figure . |
| 43/411 | In dash harness, behind left kick panel. See Figure . |
| 43/412 | In dash harness, behind left side of dash. See Figure . |
| 43/414 | In dash harness, behind left side of dash. See Figure . |
| 43/415 | In dash harness, behind center of dash. See Figure . |
| 43/416 | In dash harness, behind left side of dash. See Figure . |
| 43/418 | In dash harness, behind left kick panel. See Figure . |
| 43/419 | In dash harness, behind left side of dash. See Figure . |
| 43/420 | In dash harness, behind left side of dash. See Figure . |
| 43/424 | In passenger compartment harness, at base of left kick panel. See Figure . |
| 43/425 | In passenger compartment harness, under driver's seat. See Figure . |
| 43/426 | In passenger compartment harness, under driver's seat. See Figure . |
| 43/427 | In passenger compartment harness, under driver's seat. See Figure . |
| 43/428 | In passenger compartment harness, under driver's seat. See Figure . |
| 43/429 | In passenger compartment harness, under driver's seat. See Figure . |
| 43/430 | In dash harness, behind left side of dash. See Figure . |
| 43/431 | In dash harness, behind center of dash. See Figure . |
| 43/500P | In door harness, inside left front door. |
| 43/501 | In roof harness, at top of left "A" pillar. |
| 43/502 | In roof harness, at top of left "A" pillar. |
| 43/503 | In roof harness, at top of left "A" pillar. |
| 43/600 (S40) | In rear harness, at breakout for right rear headliner. |
| 43/600 (V40) | In rear harness, behind right rear wheelwell. |
| 43/601 | In rear harness, at breakout for right taillight. |
| 43/602 | In rear harness, at breakout for right taillight. |
| 43/603 | In rear harness, near breakout for right taillight. |
| 43/604 | In rear harness, at left rear corner of vehicle. |
| 43/605 | In rear harness, at left rear corner of vehicle. |
| 43/606 | In rear harness, at left rear corner of vehicle. |
| 43/607 | In rear harness, at left rear corner of vehicle. |
| 43/608 | In rear harness, near breakout for left taillight. |
| 43/609 | In rear harness, near breakout for left taillight. |
| 43/610 | In rear harness, at breakout for left taillight. |
| 43/611 | In rear harness, at breakout for left taillight. |
| 43/612 (S40) | In rear harness, at breakout for right rear headliner. |
| 43/612 (V40) | In rear harness, near breakout for 44/34. |
| 43/614 | In rear harness, at breakout for right taillight. |
| 43/615 | In rear harness, at breakout for left taillight. |
| 43/618 | In tailgate harness, at left side of tailgate. |
| 43/619 | In cargo compartment harness, at breakout for right license plate lamp. |
| 43/620 | In cargo compartment harness, at breakout for right license plate lamp. |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.