Motor on firewall passanger side
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Senior User
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From: Fort Wayne IN
Motor on firewall passanger side
Here is a photo of the engine bay of my 78 F150. On the passenger side there is a small electric motor that I thought was the heater blower motor but I read that motor is in the heater box so not sure what this is.
In the photo upper left corner.
Thanks
In the photo upper left corner.
Thanks
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
That is the heater blower motor. Its shaft pokes into the heater box, the fan fits onto the shaft.
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Senior User
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From: Fort Wayne IN
Thanks Follow up question.
Looks like I have to remove it from the cab side right?
Also if I make a jumper from the battery to this motor it should spin right? That is if it is good.
Looks like I have to remove it from the cab side right?
Also if I make a jumper from the battery to this motor it should spin right? That is if it is good.
Fleet Owner
Joined: Dec 2009
Posts: 20,678
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From: NorCal
Among other attachments, the three nuts hold the heater case to the firewall.
FYI.. Application of 12 volts should energize the blower motor at full speed.
Lead Driver
Joined: Jul 2017
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From: San Jose, CA
Since it looks like a 2-wire motor, with the black one being a ground (rather than a low and a high) presumably, make sure that the motor is indeed grounded.
If attached to the body, make sure that the body has a good ground from the battery too. Many times when a battery cable is replaced they neglect to attach the body ground. Just the cable going to the engine will sometimes get the job done, but not always.
Especially after these trucks age a bit.
Paul
If attached to the body, make sure that the body has a good ground from the battery too. Many times when a battery cable is replaced they neglect to attach the body ground. Just the cable going to the engine will sometimes get the job done, but not always.
Especially after these trucks age a bit.
Paul
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Senior User
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From: Fort Wayne IN
I pulled the heat box off last night and removed motor. The motor is locked solid looks like water got in the motor and rusted the inside. I did try it across the battery and it doesn't do anything at all.
Looked up the motor online last night and ordered a replacement can't beat $22.
Looked up the motor online last night and ordered a replacement can't beat $22.
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spartan117_mc
1973 - 1979 F-100 & Larger F-Series Trucks
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Oct 16, 2006 01:56 PM
