Volvo Coupes/Sedans/Wagons 1970-1989 Repair Guide




See Figures 1, 2, 3, 4 and 5

All electrical equipment is protected from overloading by fuses. Each fuse has an amperage rating that will allow it to transmit a predetermined amount of current before its filament melts, thereby stopping the excessive current flow. By providing this engineered "weak spot" in the circuit, the first failure will occur at a known location (the fuse), eliminating hours of tracing wiring harnesses to locate a problem.

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Fig. Fig. 1: Turn the knob on the bottom of the cover, then remove to access the fuse panel

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Fig. Fig. 2: The back of the fuse panel has a legend that locates each fuse and its describes its application

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Fig. Fig. 3: Always install new fuses with the correct amperage

If a fuse blows repeatedly, the trouble is probably in the electrical component that the fuse protects. Never replace a fuse with another of a higher ampere rating. Sometimes a fuse will blow when all of the electrical equipment protected by the fuse is operating, especially under severe weather conditions. For this reason, it is wise to carry a few spare fuses of each type in the car.

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Fig. Fig. 4: Fusebox locations-100 and 200 series

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Fig. Fig. 5: Fusebox location-all 700 series models, except 1988-89 760

When tracking down an inoperative electrical circuit, follow a logical pattern. Wiring itself is rarely the problem on modern cars. Your time is better spent checking the fuse, the component(s) in the circuit, the circuit grounds and the wiring connectors. Remember that in some cases a fuse can look good but not be capable of passing an electrical load. Either remove the fuse and check it with an ohmeter or simply replace it with a new one. Always have the ignition switched off when removing and replacing fuses. On all models, the circuit that each fuse protects is given either on the fuse box cover or in the owners manual. Volvo fuseboxes are located as follows:

1970-71 100 Series: Behind a snap-out panel in the dashboard above the transmission tunnel.
1972 100 Series: Over the transmission tunnel, behind the control panel for the clock, rear defroster and emergency flashers. Remove the two retaining screws at the upper corners of the panel and tilt the panel down.
1800 Series: Under the dashboard, to the driver's left.
1973 and later 100 and 200 Series: Behind a swing-out cover on the lower part of the left front pillar.
1984 through 1987 740 and 760 Series and all 780: Behind the ashtray in the center console. Remove the ashtray by pulling it out and pressing down on the tongue. Lift the cover marked "Electrical Fuses". The fuses can be pulled straight up from the fusebox using either your fingers or the fuse puller provided.
1988-89 760 Series: On the left end of the dashboard, behind a swing-out panel. Spare fuses are located in a small tray which pulls out from the bottom of the fusebox.

On certain models with electronic fuel injection, an additional fuse for the fuel pump is housed in the engine compartment on the left wheel well. Diesel glow plug circuits have a separate fuse located on the bottom of the glow plug relay under the hood.