Blower circuit issue
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Blower circuit issue
Greetings to all.
I am having a terrible time tracking down an electrical problem involving my blower motor, with the help of some schematics from this site I was able to determine that I am getting no power to my function switch. The schematics show the power coming from the fuse directly upstream of the switch but all of my fuses show good. Is there anything between the switch and fuse that I am missing?
Thank you for you ideas. Truck is a 1999
I am having a terrible time tracking down an electrical problem involving my blower motor, with the help of some schematics from this site I was able to determine that I am getting no power to my function switch. The schematics show the power coming from the fuse directly upstream of the switch but all of my fuses show good. Is there anything between the switch and fuse that I am missing?
Thank you for you ideas. Truck is a 1999
Post Fiend
Joined: Nov 2001
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From: Tallassee, ALabama
Check fuse #22 in instrument panel fuse box...replace to insure good...
Check Fuse #23 under the hood in the power distribution box...is a 40 amp
http://www.fordservicecontent.com/Fo.../99f23og4e.pdf
If both are good...replace relay # 31 in the power distribution box... both blower motor and function switch power go through this relay.
Check Fuse #23 under the hood in the power distribution box...is a 40 amp
http://www.fordservicecontent.com/Fo.../99f23og4e.pdf
If both are good...replace relay # 31 in the power distribution box... both blower motor and function switch power go through this relay.
Post Fiend
Joined: Nov 2001
Posts: 6,748
Likes: 118
From: Tallassee, ALabama
see if this helps
<a href="http://s564.photobucket.com/user/larry1013/media/Junk/Capture.jpg.html" target="_blank"><img src="http://i564.photobucket.com/albums/ss86/larry1013/Junk/Capture.jpg" border="0" alt=" photo Capture.jpg"/></a>
do not worry about pm......this is the attachment i was going to send
<a href="http://s564.photobucket.com/user/larry1013/media/Junk/Capture.jpg.html" target="_blank"><img src="http://i564.photobucket.com/albums/ss86/larry1013/Junk/Capture.jpg" border="0" alt=" photo Capture.jpg"/></a>
do not worry about pm......this is the attachment i was going to send
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Yes
This will help greatly, I can see by the diagram there is only the blower relay between the selector switch and the fuse box. I have switched the relay with another of the same type in the distribution box and it changed nothing, I also checked the relay terminals for power and had none at the relay location. I am starting to suspect the wiring harness connection at the inside fuse box.
Thank you so much for your help with this, I will let you know more if I get home before it gets to late today.
Thank you so much for your help with this, I will let you know more if I get home before it gets to late today.
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okay here is what I have
there is no fuse in the f-22 slot under the dash no terminals either, under the hood all fuses are good, the relay has power to the top terminal and power to one of the side terminals when the ignition is turned on. removing the relay and reinstalling it with the power on results in a clicking of the relay about 3 times but no fan power. I have ran a jump wire to the blower from the battery in the blower is functioning with the wire connected.I have jumped the terminals were the relay normally closes and I get a second relay that clicks the same as the blower relay when you install it with power but still no power to fan
Last edited by Va_capone; Nov 24, 2014 at 12:44 PM. Reason: incomplete information
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Hotshot
Joined: Jan 2004
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From: St Louis
If you have a 99 Super Duty (F250 or higher) and you do not have a fuse F22 in the under-dash fuse panel, you will never get the blower to work as it was intended. You may wish to double-check your fuse location diagram against your fusebox to verify you're looking at the correct location, otherwise, a wild goose chase will continue.
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as I mentioned the under the dash board fuse box has no 22 23 or 24 fuses in place but there are also no terminals for fuses to be inserted just empty spaces on the box. I did however check every one of the fuses in all three Fuse panels, to under the dash and one under the hood and all fuses checked out, there were four fuses that had no power on either side with ignition on
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Not really
the person I purchased this camper from told me it was built on a ford f 450 chassis this information maybe incorrect. But it stands to reason that if there are no terminals in the 22 slot there was never a fuse installed there yet there is a blower motor installed in the truck therefore it must be a different circuit. I will try to do a Google search tomorrow on the VIN number to see what that reveals
Hotshot
Joined: Jan 2004
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From: St Louis
Then you need to specifically and ACCURATELY identify what is being worked on. Failing to do so wastes everybody's time. First you said it was a truck, now you say it's a camper which means it's might be an F53 motor home chassis whose circuitry is different from the SD pickups or SUVs.
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Wow
Project, as I stated I was posting what I believed to be accurate information, it was the posts here that got me to thinking that I may have been given information that was inaccurate when I bought the coach. I did not think the fact that it is a motor home was pertinent to the post but I may have been wrong about that. It is in fact a 2000 Coachman Catalina motor home that I was told is on an f450 chasi. The exterior is tan