Looking for advice for a few electrical issues
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New User
Joined: Feb 2019
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Looking for advice for a few electrical issues
Thanks in advance, as I am new to the forum and my 97 F-350. Purchased the truck a few months ago and I'm getting ready to address the issues and maintenance it needs. The electrical issues I am experiencing are:
Blower motor works intermittently, start it and drive, the motor works. Turn it off and start it and it doesn't work. Drive it, then turn it off and when I start up again, the blower motor is working again. All the fan speeds work when the motor is blowing.
Both the turn signals blink fast as if one of the bulbs is blown, yet all the signals blink.
The dinging alarm letting you know your keys are in the ignition or the lights are on most always stays on when I open the door, even when the lights are off and the keys are out.
I am curious if these problems are related to something bigger, or if I need to track these problems individually.
Blower motor works intermittently, start it and drive, the motor works. Turn it off and start it and it doesn't work. Drive it, then turn it off and when I start up again, the blower motor is working again. All the fan speeds work when the motor is blowing.
Both the turn signals blink fast as if one of the bulbs is blown, yet all the signals blink.
The dinging alarm letting you know your keys are in the ignition or the lights are on most always stays on when I open the door, even when the lights are off and the keys are out.
I am curious if these problems are related to something bigger, or if I need to track these problems individually.
Post Fiend
Joined: Dec 2009
Posts: 15,505
Likes: 18
From: Livoina,La
On the blower you need to test the power to it when it’s not working. This will determine if it’s a power issue or a motor issue.
On the signals, check to see if someone installed LED bulbs.
Seat belt chime sound like a bad receiver. Reach under the driver seat and unplug it.
On the signals, check to see if someone installed LED bulbs.
Seat belt chime sound like a bad receiver. Reach under the driver seat and unplug it.
Lead Driver
Joined: Sep 2002
Posts: 9,540
Likes: 2,031
From: North Texas
My money is on a blower issue. They are about $45 new at The Zone. If yours is from the '90s, be smart to replace anyway.
The dinging...seatbelt or the ign tumbler contact is dead. Can just unplug it for now under dash, by where the electric brake harness plugs into it. I desoldered the pin within the chime module to retain headlight on chime. I can tell you what to remove if you care.
The dinging...seatbelt or the ign tumbler contact is dead. Can just unplug it for now under dash, by where the electric brake harness plugs into it. I desoldered the pin within the chime module to retain headlight on chime. I can tell you what to remove if you care.
Post Fiend
Joined: Dec 2009
Posts: 15,505
Likes: 18
From: Livoina,La
Mountain Pass
Joined: May 2017
Posts: 152
Likes: 3
From: Colorado
ive never seen a motor work intermittently that was going bad, at least not in my electrical career. Almost always a switch or connection issue. But you learn something new everyday.
Post Fiend
Joined: Dec 2009
Posts: 15,505
Likes: 18
From: Livoina,La
When they start doing this if you pop the hood and smack the motor most of the time the will start tuning again.
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New User
Joined: Feb 2019
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On the blower you need to test the power to it when it’s not working. This will determine if it’s a power issue or a motor issue.
On the signals, check to see if someone installed LED bulbs.
Seat belt chime sound like a bad receiver. Reach under the driver seat and unplug it.
On the signals, check to see if someone installed LED bulbs.
Seat belt chime sound like a bad receiver. Reach under the driver seat and unplug it.
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Thread Starter
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New User
Joined: Feb 2019
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My money is on a blower issue. They are about $45 new at The Zone. If yours is from the '90s, be smart to replace anyway.
The dinging...seatbelt or the ign tumbler contact is dead. Can just unplug it for now under dash, by where the electric brake harness plugs into it. I desoldered the pin within the chime module to retain headlight on chime. I can tell you what to remove if you care.
The dinging...seatbelt or the ign tumbler contact is dead. Can just unplug it for now under dash, by where the electric brake harness plugs into it. I desoldered the pin within the chime module to retain headlight on chime. I can tell you what to remove if you care.
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New User
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Lead Driver
Joined: Mar 2006
Posts: 5,104
Likes: 1,521
From: western SD
The brushes in the motor are worn out, and when you smack the motor, this jars them into contact so the motor will turn. Time for a new motor.
Lead Driver
Joined: Sep 2002
Posts: 9,540
Likes: 2,031
From: North Texas
It is Pin 4, black/pink, on the plug to the chime module. I removed the module, desoldered the pin inside the box. Reinstalled. Easy.
While you are swapping blow motor, you probably should just buy new cages. I cannot seem to get old ones off without them exploding in my hands. Also, look for any crap in the evap case...you will be surprised how much **** is inside there. I posted in my build thread what I used to clean my evap, highly recommended it.
Hotshot
Joined: Dec 2012
Posts: 11,271
Likes: 1,654
From: Las Cruces New Mexico
Clean the EVAP coil as well, you will have to remove the side cover (the one by the passenger side valve cover) use a water hose sprayer by spraying it from engine side to fender side.