10 amp fuse for blower motor relay blowing - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 01-20-2010
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10 amp fuse for blower motor relay blowing

The 10 amp fuse for blower motor relay in position 2 in the inside fuse box is blowing.Could it be the blower motor relay going out or the blower itself causing the blow out?This also turns the airbag light on when it blows plus the blower won't work.Any ideas?
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Old 01-20-2010
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Try a 15 amp fuse but don't go any higher. Could be a short in the windings or somewhere else. LR
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Old 01-21-2010
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I have heard many times not to exceed the amps the circuit is designed to use.
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Old 01-21-2010
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Running a 15 amp fuse in there will tell you whether it is just popping the 10 amp or if you have a short. You're not going to burn anything up with a 15 amp, no. 30 amp probably. Its at least a good start to tell whether or not something's shorting out. LR
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Old 01-25-2010
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Someone on this site told me the biggest problem with the blower motor is the connections.

Clean them up and try again, maybe something has gotten in the vent and is causing either too much friction when spinning or is blocking the motor.

IMHO… DO NOT INCREASE THE FUSE VALUE IN AN OEM CIRCUIT !
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Old 01-25-2010
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Yes, see if something is stopping it first.
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Old 01-27-2010
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what year is it?
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Old 01-27-2010
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The relay circuit is not directly connected to the blower. If its fuse is popping the relay is suspect. After that its a chaffed wire.
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Old 01-30-2010
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I replaced the relay and the fuse is still blowing.The blower motor does not seem as strong as it used to be.
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Old 01-30-2010
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Did you clean the connections ?
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Old 02-01-2010
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I checked with a mechanic at a local shop.His opinion is that the blower motor is blowing the fuse.The blower works on all speeds but is not as strong as it used to be.It is a 2002 Ranger.Guess I will change the blower motor out when it gets a little warmer.It is a tricky problem.It is pretty annoying to have the airbag light on when the fuse blows.Wonder why Ford put the airbag deactivation switch on the same circuit?
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Old 02-01-2010
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Did you get my email?

The relay circuit is tied into the resistor. And the resistor controls the speed of the fan. This resistor is a very common failure and is cheap. Replace it.

IIRC, its suppose to be a 7.5 amp fuse not 10.

Last edited by Blhde; 02-01-2010 at 03:45 PM.
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  #13  
Old 02-04-2010
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have you checked the blower motor resistor that could be causing the problem
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  #14  
Old 02-05-2010
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I replaced the blower motor.The one I put in was made in China but has a lifetime warranty.I still have the OEM Motorcraft blower.I guess if it doesn't blow the fuse in a month I will have solved the problem.The fuse is a 10 amp and not a 7.5 amp.You can see that in the owner's manual.

Last edited by barebull98; 02-05-2010 at 05:37 PM.
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  #15  
Old 02-17-2010
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Oh so I'm not the only one with this problem.
I have a 2003 FX4 that fuse also controls the overdrive switch on the shift column, and the rear backup lights. I checked the connections for the rear lights but everything looked fine. (It seems to only happen when I change between park and drive)

Not enjoying buying 25 pack of 10 amp fuses
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Old 02-17-2010
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if the motor is not as powerful as it used to be that means the brushes in the motor could be binding or theres something inside the motor and more strain=more amps
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  #17  
Old 02-19-2010
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jrfx4...does it do it with the blower on or off? If it's with blower on, I'd check out the motor first, not hard to do.
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Old 04-23-2010
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This is a pretty tricky problem.It is a 2002 Ford Ranger.I eventually will pull off the top trim over the shifter and check out those wires for the overdrive.I did replace the blower motor.It seems like the fuse will go 3 or 4 weeks before blowing.I did get a Ford wiring diagram for the truck and a friend is still trying to figure out why the fuse blows.The fuse is a 10 amp.It is in position 2 in the fuse panel inside the truck.
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Old 04-23-2010
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Why not just check the wires to the O/D Cancel switch? That is probably what's wrong.
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Old 04-24-2010
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Yes,I plan to check the wires soon.I will have to take the part off around the shifter.I may have to drop the bottom under the instrument cluster.How many parts do I need to take off the see the o/d wires?
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Old 04-24-2010
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Just the top half of the column cover. There are some screws that come up from the bottom half.
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  #22  
Old 12-24-2010
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It appears the tcs(overdrive) wires were shorting out the 10 amp fuse.I disconnected the overdrive under the dash.It has been about 4 days and the 10 amp fuse hasn't blown anymore.I don't really see a downside to disconnecting this because I never had overdrive off anyway.If overdrive is off you can't go to the 5th speed.The overdrive wires come out of the shift lever at a 90 degree angle and it appears after high mileage the wires short out.
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