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.
1987 Volvo 780 AW71FACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| ABS Control Unit | In floor cavity, on right side of trunk. See Figure . |
| Anti-Theft Alarm Control Unit | Under left side of dash, on driver's kick panel. See Figure . |
| Fuel Injection Control Unit | Under right side of dash, on passenger's kick panel. |
| Ignition Control Unit | Under left side of dash, above steering column. |
| Power Seat Control Unit | Under driver's seat. |
| SRS Stand-By Power Unit | In floor cavity, under driver's seat. See Figure . |
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.