Blower motor blows fuse
#1
Junior Member
Thread Starter
Join Date: Mar 2013
Location: Reno, NV
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1995
Model: Cherokee
Engine: 4.0
Blower motor blows fuse
My 30a fuse for blower motor keeps blowing. I have replaced the resistor and it still kills the fuse. I unhook the blower motor and it still blows. My guess is I have a short somewhere under the dash but before I start pulling everything apart maybe someone here has a suggestion?
I had one of hoses connecting to the airbox disconnected when the fuse first blew but I'm not sure if that is just a coincidence.
Hopefully someone may beable to help me narrow down this m
Problem. Thank you.
I had one of hoses connecting to the airbox disconnected when the fuse first blew but I'm not sure if that is just a coincidence.
Hopefully someone may beable to help me narrow down this m
Problem. Thank you.
#2
CF Veteran
Join Date: May 2015
Location: San Antonio, TX
Posts: 1,472
Likes: 0
Received 5 Likes
on
5 Posts
Year: 1992
Model: Cherokee
Engine: 4.0L H.O.
My 30a fuse for blower motor keeps blowing. I have replaced the resistor and it still kills the fuse. I unhook the blower motor and it still blows. My guess is I have a short somewhere under the dash but before I start pulling everything apart maybe someone here has a suggestion?
I had one of hoses connecting to the airbox disconnected when the fuse first blew but I'm not sure if that is just a coincidence.
Hopefully someone may beable to help me narrow down this m
Problem. Thank you.
I had one of hoses connecting to the airbox disconnected when the fuse first blew but I'm not sure if that is just a coincidence.
Hopefully someone may beable to help me narrow down this m
Problem. Thank you.
#3
Junior Member
Thread Starter
Join Date: Mar 2013
Location: Reno, NV
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1995
Model: Cherokee
Engine: 4.0
Yeah it was the switch, the pigtail was melted but also my blower is shot so I'll be replacing that.
I have cut off the pig tail and am considering buying the individual connectors and just putting them on the right terminals.
#4
Member
@Scottjames84, Hey can you show your repair if you managed to do it. i have the same problem and im curious of what you end up doing.
#5
Banned
Join Date: Oct 2016
Posts: 1,553
Likes: 0
Received 4 Likes
on
4 Posts
Year: 2000 and 1998
Model: Cherokee
Engine: 4.0
the "40" amp fuse in the diagram goes first to the blower relay , then to the motor that gets pulled to ground thru the resistors/sw. so it cant be the resistors. motor, could be bad.
pull the relay see if fuse blows. if not it looks like motor.OR wiring!!
trouble like this you gotta be looking at the wire diagram.
i reread your original post,not motor or res. pull relay.must be short to ground at or after relay, the dg wire to the motor
if you pull relay and fuse you can check ohms on the dg wire, no volts there with fuse out.
pull the relay see if fuse blows. if not it looks like motor.OR wiring!!
trouble like this you gotta be looking at the wire diagram.
i reread your original post,not motor or res. pull relay.must be short to ground at or after relay, the dg wire to the motor
if you pull relay and fuse you can check ohms on the dg wire, no volts there with fuse out.
Last edited by nujeepguy; 11-01-2016 at 06:30 PM.
#6
CF Veteran
Join Date: Aug 2010
Location: Canton, MI
Posts: 8,357
Likes: 0
Received 82 Likes
on
67 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
the "40" amp fuse in the diagram goes first to the blower relay , then to the motor that gets pulled to ground thru the resistors/sw. so it cant be the resistors. motor, could be bad.
pull the relay see if fuse blows. if not it looks like motor.OR wiring!!
trouble like this you gotta be looking at the wire diagram.
i reread your original post,not motor or res. pull relay.must be short to ground at or after relay, the dg wire to the motor
if you pull relay and fuse you can check ohms on the dg wire, no volts there with fuse out.
pull the relay see if fuse blows. if not it looks like motor.OR wiring!!
trouble like this you gotta be looking at the wire diagram.
i reread your original post,not motor or res. pull relay.must be short to ground at or after relay, the dg wire to the motor
if you pull relay and fuse you can check ohms on the dg wire, no volts there with fuse out.
Besides, you are talking about a '97+ HVAC system. There is no relay in the early HVAC systems.
#7
Banned
Join Date: Oct 2016
Posts: 1,553
Likes: 0
Received 4 Likes
on
4 Posts
Year: 2000 and 1998
Model: Cherokee
Engine: 4.0
yeah i didnt see what he had and i wouldnt have known better anyway. i downloaded a fsm and dont know where it came from!!
it helps me and i thought it might be useful. i still wonder about the switch, often the conn melt. hummers had a recall on the harness , no bad sw or resistors to speak of.
hey ccken what about my o2 #2 that was bad till i plugged loose conn in, worked 2 days then reads bad again?, po138 i think.
it helps me and i thought it might be useful. i still wonder about the switch, often the conn melt. hummers had a recall on the harness , no bad sw or resistors to speak of.
hey ccken what about my o2 #2 that was bad till i plugged loose conn in, worked 2 days then reads bad again?, po138 i think.
Last edited by nujeepguy; 11-01-2016 at 07:26 PM.
Thread
Thread Starter
Forum
Replies
Last Post
Gmaster
MJ Comanche Tech. Stock & Modified.
8
10-10-2016 01:55 AM
wgebb
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
5
10-09-2016 09:48 PM
Billy Bee
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
8
10-03-2016 04:57 PM
Rojito
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
1
10-03-2016 11:43 AM
Billy Bee
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
0
09-29-2016 02:25 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)