blower motor power issue
Thread Starter
3rd Gear
Joined: Sep 2017
Posts: 3
Likes: 0
From: Albemarle NC
blower motor power issue
Hopefully someone here has some input for this. I have been working on the heater and replaced the heater core and now I have moved on to the blower. I can get the blower to turn on and run at the different speeds however I have noticed that the switch for high medium and low is either hooked up backwards or the switch is seated backwards in the center console. Now in order to make it work I have to have to hood open. The hood ajar switch is keeping power from getting to the blower. Which is my issue right now. I'm thinking it might be as simple as a bad or missing ground but wanted to get input from others. Any ideas?
Thanks in advance for any insight.
Thanks in advance for any insight.
Melting Slicks
Joined: May 2011
Posts: 2,753
Likes: 119
From: Springfield Missouri
how about some info, such as year of car, how long you have had the car, any work done on the car lately etc. I see you are a new member, WELCOME
.
I don't see how the hood ajar switch could be the problem, has anyone worked on the blower motor resistor on the firewall (kind of on the top of firewall) this resistor determines the fan speed, the plug could be on backwards, causing it to not operate when hood is opened. Causing a poor connection. IMO
.I don't see how the hood ajar switch could be the problem, has anyone worked on the blower motor resistor on the firewall (kind of on the top of firewall) this resistor determines the fan speed, the plug could be on backwards, causing it to not operate when hood is opened. Causing a poor connection. IMO
Last edited by lvmyvt76; Feb 7, 2018 at 03:08 PM.
Thread Starter
3rd Gear
Joined: Sep 2017
Posts: 3
Likes: 0
From: Albemarle NC
how about some info, such as year of car, how long you have had the car, any work done on the car lately etc. I see you are a new member, WELCOME.
I don't see how the hood ajar switch could be the problem, has anyone worked on the blower motor resistor on the firewall (kind of on the top of firewall) this resistor determines the fan speed, the plug could be on backwards, causing it to not operate when hood is opened. Causing a poor connection. IMO
.I don't see how the hood ajar switch could be the problem, has anyone worked on the blower motor resistor on the firewall (kind of on the top of firewall) this resistor determines the fan speed, the plug could be on backwards, causing it to not operate when hood is opened. Causing a poor connection. IMO
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
Your hood switch... for your alarm system...someone has some how made it that the GROUND for your BLOWER MOTOR is coming off of that switch. Which is incorrect....obviously
Disconnect the ground wire on your blower motor and run a new wire and report back to what happens.
ALSO...often times when people work on the starter.,..they confuse the large black wire with the large eyelet terminal as one that gets attached to the lug on the solenoid to supply power to the car. That black wire down by the starter is the GROUND wire for your wiper motor and blower motor....and needs to be bolted to either the bolt for your transmission bellhousing or one of the bolts that hold the starter to the engine block.
DUB
Disconnect the ground wire on your blower motor and run a new wire and report back to what happens.
ALSO...often times when people work on the starter.,..they confuse the large black wire with the large eyelet terminal as one that gets attached to the lug on the solenoid to supply power to the car. That black wire down by the starter is the GROUND wire for your wiper motor and blower motor....and needs to be bolted to either the bolt for your transmission bellhousing or one of the bolts that hold the starter to the engine block.
DUB
Thread Starter
3rd Gear
Joined: Sep 2017
Posts: 3
Likes: 0
From: Albemarle NC
Your hood switch... for your alarm system...someone has some how made it that the GROUND for your BLOWER MOTOR is coming off of that switch. Which is incorrect....obviously
Disconnect the ground wire on your blower motor and run a new wire and report back to what happens.
ALSO...often times when people work on the starter.,..they confuse the large black wire with the large eyelet terminal as one that gets attached to the lug on the solenoid to supply power to the car. That black wire down by the starter is the GROUND wire for your wiper motor and blower motor....and needs to be bolted to either the bolt for your transmission bellhousing or one of the bolts that hold the starter to the engine block.
DUB
Disconnect the ground wire on your blower motor and run a new wire and report back to what happens.
ALSO...often times when people work on the starter.,..they confuse the large black wire with the large eyelet terminal as one that gets attached to the lug on the solenoid to supply power to the car. That black wire down by the starter is the GROUND wire for your wiper motor and blower motor....and needs to be bolted to either the bolt for your transmission bellhousing or one of the bolts that hold the starter to the engine block.
DUB
Thank you for the help! It turns out that this was the issue and I ran a new wire for the ground and it solved the problem. Now I need to see why the low, medium, and hi switch seems to be backwards. (It all works just in the reverse order than it should be.) I'll be digging in to that this weekend. Thank you for everyone's help on this.
