1970 blower motor troubleshoot - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 7 (permalink) Old Mar 25th, 20, 8:49 AM Thread Starter
Tech Team
 
Join Date: Jul 2004
Location: Ohio
Posts: 271
1970 blower motor troubleshoot

Trying to figure out why my blower motor donít work. It was new motor when i did restoration and Iíve never been able to get it to work. I tried using a jumper direct to see if it works..

The ground to the blower motor is good but if i put a jumper to try and power it the jumper sparks like crazy and the fusible link glows red. Instead of jumping from battery to blower i am jumping the red wire and purple wire in the pigtail thatís connects to relay. Now let me ask this also. If my heater box resistor is bad would that cause this to spark? But yesterday i tried same thing but went from battery to blower motor and it sparked too. Really struggling here. Lol
Ryan T is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old Mar 25th, 20, 10:45 AM
Lifetime Premium Member
Ed
 
Join Date: Jul 2000
Location: Spanish Fort, AL
Posts: 1,160
Re: 1970 blower motor troubleshoot

Are you sure the blower impeller isnít restricted in some way? Did you test the blower before it was installed?
I purchased a new blower motor with impeller and comparing with the take out, had a deeper impeller, which would have contacted metal.

Ed C.
-------------------------
70 SS Gold L34 Auto
57 Belair hardtop project
Always looking
-------------------------
There's nothing in this hobby I won't try at least once.
EdCarpenter is offline  
post #3 of 7 (permalink) Old Mar 25th, 20, 2:15 PM Thread Starter
Tech Team
 
Join Date: Jul 2004
Location: Ohio
Posts: 271
Re: 1970 blower motor troubleshoot

No Iím not and was hoping to avoid ripping front fender apart to pull the blower motor but it looks like that is going to have to happen.
Ryan T is offline  
 
post #4 of 7 (permalink) Old Mar 25th, 20, 9:23 PM
Lifetime Premium Member
Ed
 
Join Date: Jul 2000
Location: Spanish Fort, AL
Posts: 1,160
Re: 1970 blower motor troubleshoot

I too had to change out my blower motor on my 70. Worked fine out of the car, but was too noisy once installed. I had to be careful since everything was fresh. I took out the all the inner fender bolts except the 3 or so that hold the battery plate and at the rad support. Used a 3 foot piece of 2Ē pvc pipe to pry the inner fender away from the blower area (wheel was off). This allowed enough room to pull the motor out without causing damage to paint. The inner fender may deform a bit, but will pull back once you re-fasten it. Mine was an AC car.

Ed C.
-------------------------
70 SS Gold L34 Auto
57 Belair hardtop project
Always looking
-------------------------
There's nothing in this hobby I won't try at least once.
EdCarpenter is offline  
post #5 of 7 (permalink) Old Mar 26th, 20, 2:16 PM Thread Starter
Tech Team
 
Join Date: Jul 2004
Location: Ohio
Posts: 271
Re: 1970 blower motor troubleshoot

Did you have to put a new blower in or was there something else you did? What made it work finally in the car.
Ryan T is offline  
post #6 of 7 (permalink) Old Mar 26th, 20, 6:40 PM
Lifetime Premium Member
Ed
 
Join Date: Jul 2000
Location: Spanish Fort, AL
Posts: 1,160
Re: 1970 blower motor troubleshoot

The blower impeller rattled when installed. I removed the blower to replace it with aftermarket. The aftermarket impeller shaft and impeller was 1/2 inch deeper than the original. Luckily I had a couple of old take offs in my inventory. Tested, cleaned and painted one of them and installed it.
Now works quietly.

Ed C.
-------------------------
70 SS Gold L34 Auto
57 Belair hardtop project
Always looking
-------------------------
There's nothing in this hobby I won't try at least once.
EdCarpenter is offline  
post #7 of 7 (permalink) Old Mar 27th, 20, 7:27 AM Thread Starter
Tech Team
 
Join Date: Jul 2004
Location: Ohio
Posts: 271
Re: 1970 blower motor troubleshoot

Gotcha, thanks, looks like i will remove and check off the car and also make sure it moves freely.
Ryan T is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in










Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome