VOLVO Repair Manual - Table of Content [700] [900]
by www.VLVworld.com - Your Internet VOLVO Part and Accessory Store Since 1997 - All rights reserved

0.3 Fuses and Relays


Fuses

Fuses are designed to fail when a current exceeding the rating is passed accross the terminals. Some failures can be caused by isolated instances- accidentally shorting out light connectors when changing a bulb. In isolated instances the fuse can just be replaced by a new one. However, frequent failure of a fuse indicates other problems which should be investigated. All the electrical systems and the wiring that is protected by that particular fuse should be examined for a short circuit. Typical short circuit location are:

If the circuit your are checking has more than one item connected, for example fuse #21 below, you can isolate the problem if you have 2 spare fuses. Remove fuse and disconnect all output wires at the fuse box position #21. Replace the blown fuse with a new one, re-connect one by one the circuits on the fuse box. Check all items on the list each time you reconnect a wire. When the fuse blows again the hot wire is found. Let say the hot wire is going the rear lights, check in detail the LH parking light and both license plate lights. In case of emergency, disconnect only the light that short-circuits, you can use the other ones until the fault is corrected.

fuse #21 LH parking lights (front and rear),
License plate light
Lighting for: ash tray, heater, control panel, switch for heated rear window

When buying spare fuses always replace with the same style and amperage specified, do not take for granted that the fuse in the box is the correct amperage, check the fuse label for the specified amperage.

VOLVO 740/760/780 Fuse Box

The early 740/760 series have the fuse box located behind the ashtray. Pull up on the handle below the ashtray, marked electrical fuses - press upward, and lift out the ashtray with housing. The fuse label is on the back of the ashtray. The 700 series came with a fuse removal tool, mounted on the right hand side of the fusebox. This white plastic handle is not really required, simply pull out the fuse using your fingers. To see if a fuse is blown it is necessary to remove it from the fusebox. Push the tool onto the top of the fuse, then pull upwards. Slide it out the fuse from the tool grip. Spare fuses are in position 23, 24, 26 of the fuse box. If you need to get the whole fuse box out of the dash, for example to get to the relays or troubleshoot fuse circuits, follow the instructions in the section "VOLVO 700 Series Relays" below.

 

Description
Help on catalogue format
Model Year Part
Number
Type Price
US$
Quantity
Fuse Kit: assorted set of 11 fuses (1 of 30 AMP, 2 of 25 AMP, 3 of 15 AMP, 3 of 10 AMP, 2 of 5 AMP) 740,760,780 82-92 270927 New 8.51

 

VOLVO 740/760 Fuse Box (check back side of the ashtray)

Location Electrical Systems Amperage
1
Fuel Pump, Fuel Injection System
25
2
Central locking, Hazard warning flashers, Headlight flashers, ABS
25
3
Fog Lights
15
4
Brake lights, Shift indicator light, trunk light, antenna, door warning
15
5
Glove compartment light, Clock, Radio, Engine compartment light, Interior Light, Trunk light, Antenna, Door warning, make-up mirror light
15
6
Heated front seats
30
(1985-15)
7
Electric Cooling Fan
25
8
Electrically Operated Windows
30
9
Warning light, Seat belt, Turn signals, Air conditioning, Heated front seats, Electric cooling fan, Electrically-operated windows
15
10
Heated rear window, heated mirrors, power sunroof
30
11
In-Tank fuel pump, Heated Lambda sensor
15
12
Back-up lights, Cruise control, Overdrive (manual transmission), Disengagement of 4th gear on automatic transmission AW71, ABS
15
Location Electrical Systems Amperage
13
(Spare)
15
14
Electrically-operated side view mirrors, Cigarette lighter, Radio, Rear wiper (wagon)
15
15
Horn, Windshield wash/wipe
25
16
Heater blower, Air conditioning
30
17
High beam (left)
15
18
High beam (right), Extra lights
15
19
Low beam (left)
15
20
Low beam (right)
15
21
LH parking lights (front and rear), License plate light, Lighting for: ash tray, heater, control panel, switch for heated rear window
15
22
Seat belt light, RH parking lights (front and rear), Storage compartment behind parking brake, Fog lights
15
23
(Spare)
15
24
(Spare)/Diagnostic socket
15/-
25
Rear fog lights
15
26
(Spare)
30

On cars equipped with ABS, the system is protected by an additional 10A fuse located under the instrument panel to the left of the steering wheel

 


VOLVO 700 Series Relays

Relays are electrically operated switches that are used to perform logic functions (wiper delays, bulb out sensors) and enable the control of electronic items without the current passing through the switch. Occasionally relays stop functioning correctly. Some become hot when running and their internal connections can eventually fail.

Fuse Box Removal for relay replacement

The relays are difficult to access in their mounted position. It is best to first remove the storage shelf (or audio equalizer) above the fuse box, then pull the whole fuse box/relay panel into the vehicle.

VOLVO 740/760 Relays

Relay Inspection/Repair


You are looking at page 700_0_3.htm
Welcome to www.VLVworld.com - Your Internet VOLVO Part and Accessory Store Since 1997 - All rights reserved