Is a 30 amp fuse and a 30 amp circuit breaker the same thing?

What 30 amp fuse & what circuit breaker ? Do you know how to view a wiring diagram an use a DVOM - digital volt ohm meter to test B+ power & ground circuit's ? Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine . Under system click on body & accessories , then under subsystem click on power windows . I see a 30 amp fuse F1 located in the smart junction box (inside fuse box) , F47 30 amp fuse same location . F41 15 amp fuse . Don't see any circuit breaker's invloved . Pull the driver door panel an check for B+ power to the driver master switch. Don't just replace fuse's See the tab's on top of the fuse ,test voltage with volt meter . If you don't know how to test automotive electrical circuits , your best bet , take to a qualified repair shop or learn how .

Electric Testing Techniques You Need to Know

FUSE PANEL LOCATION
The fuse panel is located in the engine compartment. A label on the inside of the cover lists the fuse amperage and circuits protected.
volvo 850 fuses fuse panel layout service repair manual
FUSE PANEL IDENTIFICATION
Fig. 1: Fuse Panel Identification
Courtesy of Volvo Cars of North America.
WARNING: Always disconnect battery ground cable before servicing "high-current fuses. It is recommended that "high-current" fuses be replaced by a qualified technician.
* 1 - 15 Amp
Fuel Injection, Distributor Ignition, Automatic Gearbox
* 2 - 15 Amp
Fuel Pump, Alarm System
* 3 - 10 Amp
Courtesy Lights, Oil Level Sensor
* 4 - Not Used (1993-95)
* 4 - 10 Amp (1996)
Electronic Start Inhibitor (Immobilizer)
* 5 - 30 Amp
ECC Blower (Speed 4)
* 6 - 25 Amp
Central Locking System, Alarm
* 7 - 15 Amp
Audio System (Amplifier)
* 8 - 25 Amp (1993-95)
Power Antenna, Trailer Connector
* 8 - 40 Amp (1996)
Electronic Start Inhibitor (Immobilizer)
* 9 - 30 Amp
ABS, Traction Control System
* 10 - Not Used (1993-95)
* 10 - 15 Amp (1996)
Heated Rear Seat (If Equipped)
* 11 - 30 Amp
Heated Rear Window & Side Mirrors
* 12 - 10 Amp
Brake Lights
* 13 - 15 Amp
Hazard Flashers, Headlight Flashers, Alarm
* 14 - 30 Amp
ABS, Traction Control System
* 15 - 10 Amp (1993-95)
Audio System, Courtesy Lights, Door Open Light, Trunk Light, Glove Box Light, Remote Control Central Locking System,
Oil Level Sensor, Seat Belt Reminder
* 15 - 10 Amp (1996)
Audio System, Courtesy Lights, Door Open Light, Trunk Light, Glove Box Light, Remote Control Central Locking System,
Oil Level Sensor, Seat Belt Reminder, Data Link Connector
* 16 - 30 Amp (1993-95) Accessories
* 16 - 30 Amp (1996)
Power Antenna, Trailer Connector, Accessories
* 17 - 10 Amp
Key Reminder
* 18 - 25 Amp (1993-95)
Heated Front Seats, Power Mirrors
* 18 - 15 Amp (1996) Front Fog Lamps
* 19 - 15 Amp
Left High Beam Headlight
* 20 - 15 Amp
Right High Beam Headlight, High Beam Indicator
* 21 - 15 Amp
Left Low Beam Headlight
* 22 - 15 Amp
Right Low Beam Headlight
* 23 - 10 Amp
Left Parking Light, License Light
* 24 - 10 Amp
Right Parking Light, Bulb Failure Warning Sensor
* 25 - 10 Amp
Rear Fog Lamps, Fog Lamp Indicator
* 26 - Not Used (1993-95)
* 26 - 25 Amp (1996)
Heated Front Seats, Power Mirrors
* 27 - 15 Amp
Back-Up Lights, Turn Signals
* 28 - 10 Amp
Cruise Control, Heated Rear Window, Seat Belt Reminder Light, Shiftlock, Bulb Failure Warning Sensor, Heated Rear Seat
* 29 - 15 Amp
ABS, Traction Control System
* 30 - 10 Amp
Cigarette Lighter
* 31 - 25 Amp
ECC, ECC Blower (Speeds 1-3)
* 32 - 10 Amp
Audio System, Remote Controlled Central Locking System
* 33 - 15 Amp (1993-95)
Power Seats, OBD Test Socket, Tailgate Washer/Wipe (Wagon)
* 33 - 15 Amp (1996)
Power Seats, Tailgate Washer/Wipe (Wagon)
* 34 - 25 Amp
Windshield Wiper/Washer, Horn, Headlight Washer/Wiper
* 35 - 10 Amp
Instrument Lights, Sun Roof, Traction Control System
* 36 - Not Used
* 37 - Circuit Breaker
Power Windows, Power Sun Roof
* 38 - Not Used
* 39 - Circuit Breaker
Drivers Power Seat
* 40 - Circuit Breaker
Passengers Power Seat
RELAY PANEL LOCATION
The relay panel is located at the left corner of the instrument panel.
i copied this off a volvo site Hope this helps

It should be a circuit breaker, not a fuse.

1. 5 Amp (Tan) - Instrument panel lights and lights-on reminder
2. 20 Amp (Yellow) - Choke heater
3. 30 Amp - Circuit Breaker. Power windows and sunroof
4. 10 Amp (Red) - Electronic control module
5. 25 Amp (White) - Heater and air conditioning
6. 20 Amp (Yellow - Stop and hazard lights
7. 25 Amp (white) - Windshield wipers
8. 10 Amp (Red) - Radio and cruise control
9. 30 Amp - Circuit Breaker. - Power door locks, seats and rear window defogger
10. 20 Amp (Yellow) - Courtesy lights, key warning chime, power antenna, horns, cigar lighter and clock
11. 20 Amp (Yellow) - Turn signals and back-up lamps
12. 20 Amp (Yellow) - Parking, side marker, license plate and tail lamps
13. 10 Amp (Red) - Warning lamps and buzzers, trunk release, torque converter clutch and vehicle
speed sensor
14. Not Used

Please review this article: Where's The Fuse?




1. 5 Amp (Tan) - Instrument panel lights and lights-on reminder
2. 20 Amp (Yellow) - Choke heater
3. 30 Amp - Circuit Breaker. Power windows and sunroof
4. 10 Amp (Red) - Electronic control module
5. 25 Amp (White) - Heater and air conditioning
6. 20 Amp (Yellow - Stop and hazard lights
7. 25 Amp (white) - Windshield wipers
8. 10 Amp (Red) - Radio and cruise control
9. 30 Amp - Circuit Breaker. - Power door locks, seats and rear window defogger
10. 20 Amp (Yellow) - Courtesy lights, key warning chime, power antenna, horns, cigar lighter and clock
11. 20 Amp (Yellow) - Turn signals and back-up lamps
12. 20 Amp (Yellow) - Parking, side marker, license plate and tail lamps
13. 10 Amp (Red) - Warning lamps and buzzers, trunk release, torque converter clutch and vehicle
speed sensor
14. Not Used

I don't really see a dedicated fuse or circuit breaker for the moonroof. I do see a 30 amp circuit breaker for the mmonroof but that also controls the power windows and the sliding back light as well as the moonroof, so if you're not having problems with the other stuff I would say it's not the circuit breaker. There is a 10 amp fuse for the delayed accessory power for audio, power door lock switch & the moonroof switch illumination. The 30 amp circuit breaker is located in the number 401 position in the passenger compartment fuse box (see picture below) and the 10 amp fuse I was telling you about is in the number 22 position. If it's just the moonroof itself I would check to make sure the switch itself is good or even the motor could be bad. I see no fuseable link going to the switch but that's not saying there may be a bad wire so check for power to the switch. Wish i could have been a little more help but in this case this is all I can give you. I hope this helps and good luck. Here is your picture:

It's not a Fuse you need, it's a 30 Amp Breaker type Relay. More or less it looks like a fuse where it plugs in, but looking at the fuse box, it's an aluminum looking thing the same length as your fuse and about 3/16" thick. It's main purpose is should the 30 Amps be exceeded, it will go open-circuit, until it cools down, then will work fine. On the back of your fuse door, look for your power windows "fuse/relay" and see if someone inadvertently placed a regular green 30 Amp fuse in it's place. This relay may also control things such as power seats, rear window defrosters and things of this order. If all else fails, just call a Dealerships Parts Department and they'll be glad to tell you whether you take a standard 30 Amp relay and the exact location of where it lives. (smile)

Hope this Helps,

~00 Buck~

"Still living on the Right Side of Dirt..."

A fuse blown is a short, and a short is a ahort.
The fuse is the ecm so unplug the ecm and see what happens. If the fuse holds with theecm unplugged, then it is your ecm that needs relacement. If it still blows, The short is in the wiring.go to the parts store and pick up and automatic circuit breaker. It plugs in where the bad fuse goes. It will trip and reset itself automaticallly like a flasher until you have located the short. trick, Start with a breaker of amp. examole; if you took out a 20 amp, put in a 10 amp so the breaker trips faster, On and off quicker so you don't have to wait between ressets. If you want to trace the short by the wiring, put a 25 amp or with great caution a 30 amp. That is the limit. The wire will get warm on the 25 and even warmer on the 30. Pay attention that the wire does not get hot. Hopefully yhe 25 will get the wire warm enough for you to follow. Good Luck, Ned. This method is dangerous if you don't pay very close attention using the high amp breaker. There is a risk of fire if the circuit cannot handle 30 amps. In fact, only yuse the 30 amp breaker if the 25 breaks and resets too fast. Good Luck_Ned_

relays are normally in the fuse panel on the left side of dash by knee.

Fuses and Circuit Breakers Location and Values
NOTE: The headlamp switch (11654) has an integral 20-amp circuit breaker.

• The combination instrument panel fuse and circuit breaker panel contains most of the fuses and circuit breakers used in the system.
• The fuses and circuit breakers are color-coded by amp rating.
• The locations and values of the fuses and circuit breakers not contained in the panels are shown in the following chart.

Circuit Circuit Protection and Rating Location Headlamps and High Beam Indicator 20 Amp. CB Integral with Lighting Switch Heated Back Window 16 GA Fuse Link Engine Compartment Power Windows, Power Seat, Power Door Locks 20 Amp. CB Starter Motor Relay Load Circuit Fuse Link In Harness Engine Compartment Lamp Fuse Link In Harness Convertible Top 25 Amp. CB Lower Instrument Panel-Reinforcement



Cavity Number Fuse Rating Color Circuit Protected A 40 Amp Orange

• Ignition Switch

B 40 Amp Orange

• Ignition Switch

C 40 Amp Orange

• Ignition Switch

D 50 Amp Red

• Headlamp Switch
• Instrument Panel Fuses 4, 8 and 16
• Instrument Panel Circuit Breaker 12

E 20 Amp Light Green

• PCM
• Fuel Pump
• HO2S (3.8L)
• Canister Purge Solenoid
• EVR Solenoid
• Ignition Control Module (3.8L)
• IAC Solenoid
• Fuel Injector
• Automatic Transmission
• Camshaft Position Sensor (3.8L)
• MAF Sensor

F 40 Amp Orange

• Heated Back Window

G 20 Amp Yellow

• Fuel Pump

H 60 Amp Blue

• Fan Control

J — — Not Used K 10 Amp Blue

• Anti-Lock Brake Control Module

L 20 Amp Red

• Fan Control Monitor (PCM)

M 25 Amp Yellow

• Horn
• Foglamps
• Daytime Running Lights Control Module

N 25 Amp Clear

• Fuses 5 and 9

P 20 Amp Clear

• Radio Amplifier

Q 20 Amp Yellow

• Generator

S 30 Amp Yellow

• Convertible Top Motor

T 60 Amp —

• ABS

It looks like the wire circuit for the wiper motor is touching the car body when shaken so the only thing you can do is shake the wires and terminals yourself while engine is running then maybe you can pinpoint where the earthing is.