MonteCarloSS.com
MonteCarloSS.com

CELEBRATING 20 YEARS!

Previous Thread
Next Thread
Print Thread
#1073454 - 03/15/22 01:45 PM blower motor only works on low  
Joined: Jun 2001
Posts: 1,556
markg Offline
15+ Year
markg  Offline
15+ Year
Member

Joined: Jun 2001
Posts: 1,556
nj
this just happened yesterday.when i switch it to heat the motor spins on low but will not go higher when i move the switch to higher positions.i tried jiggling the wires around but it didnt change.
any ideas on where to look?
i know this has been covered before but my search on this forum is terrible.
thanks


86 ss 86 cl,330hp GM vortec cratemotor-700-r trans worked,ford 9.5 inch rear with 3-50s,custom 3 inch exhaust with flowmasters.
#1073460 - 03/16/22 10:30 AM Re: blower motor only works on low [Re: markg]  
Joined: Jun 2001
Posts: 1,556
markg Offline
15+ Year
markg  Offline
15+ Year
Member

Joined: Jun 2001
Posts: 1,556
nj
this morning even the lowest setting didnt work at all.i guess ill check the fuse first and then maybe try to hotwire the motor to see how it spins.the motor is from autozone but only a yr old.


86 ss 86 cl,330hp GM vortec cratemotor-700-r trans worked,ford 9.5 inch rear with 3-50s,custom 3 inch exhaust with flowmasters.
#1073462 - 03/16/22 11:14 AM Re: blower motor only works on low [Re: markg]  
Joined: Jul 2003
Posts: 9,224
SickSpeedMonte Offline
15+ Year
SickSpeedMonte  Offline
15+ Year
Member

Joined: Jul 2003
Posts: 9,224
MD
Near the blower motor there should be a big 4-pin connector. Under there is the resistor pack. Pull and inspect.

https://www.webcommand.net/index.ph...rol-repair-part-1-blower-motor-resistor/

Last edited by SickSpeedMonte; 03/16/22 11:15 AM.
#1073473 - 03/17/22 04:30 PM Re: blower motor only works on low [Re: markg]  
Joined: Jun 2001
Posts: 1,556
markg Offline
15+ Year
markg  Offline
15+ Year
Member

Joined: Jun 2001
Posts: 1,556
nj
i havent checked this yet but just to be clear once the slider is set to heat the fan is automatically on low speed right?
if i have no power there then make sure the fan will spin and then check the fuse right.


86 ss 86 cl,330hp GM vortec cratemotor-700-r trans worked,ford 9.5 inch rear with 3-50s,custom 3 inch exhaust with flowmasters.
#1073485 - 03/20/22 05:38 PM Re: blower motor only works on low [Re: markg]  
Joined: Feb 2008
Posts: 947
AkronAero Offline
10+ Year
AkronAero  Offline
10+ Year
Member

Joined: Feb 2008
Posts: 947
Akron OH
Fan will run at low, M1, M2 or high depending on what you set fan switch for.
If part of the resistor pack is burned out, for example, it may only work on low???
So you are sorting out: resistor pack, switch and/or relay?
Gordon


1987 Aerocoupe. Frame-off, notched/mini-tub, 383 with AFRs @ 535HP/487TQ, March Serpentine, 304 SS headers (Jet-Hot) & 304 3" dual exhaust w/ Borlas, Janis 200-4R, TrueTrac w/ girdle and Moser 28, Hydroboost, computer delete, lowered, every part replaced or messed with (several times).
#1073486 - 03/21/22 12:02 PM Re: blower motor only works on low [Re: markg]  
Joined: Jun 2001
Posts: 1,556
markg Offline
15+ Year
markg  Offline
15+ Year
Member

Joined: Jun 2001
Posts: 1,556
nj
the problem was very intermittent as i was checking everything.
the motor spun fine if i hotwired it to the pos on the battery.
on low it would only spin if i gave it a push.i got a new motor and it still wouldnt spin by itself without a push.med and high didnt work at all.
the resistors seemed fine but the incoming voltages from the wires into it was screwey.
i pulled the heater control from the dash and checked the fan switch which seemed fine and i just replaced it last yr.it started working after playin with it and i put it back.
i moved the switch to med and hi and it wouldnt work again.
it would up being the mode selector switch.
its the only other electrical switch on the heater unit.luckilly i had a spare and its working properly now


86 ss 86 cl,330hp GM vortec cratemotor-700-r trans worked,ford 9.5 inch rear with 3-50s,custom 3 inch exhaust with flowmasters.

Random Images
500/thumbs/Shawn_1A.JPG
by Hot Rod SS
500/thumbs/291.jpg
by CashMoneyMotorsports
500/thumbs/monte_motor1.jpg
by 87 SS 454
500/thumbs/DSC00067.JPG
by SSexxymonte
500/thumbs/downsized_0402121841.jpg
by blkcharlotteman
Help MonteCarloSS.com


Recent Contributors
kevins88ss
Authorized Vendors
Tell them you saw it
on MonteCarloSS.com!


CustomMonteSSParts.com
Dixie Monte Carlo Depot
GSI Interiors
HRpartsNstuff
Mikes Montes
Savitske Classic & Custom
Powered by UBB.threads™ PHP Forum Software 7.6.0