94 Cherokee blower motor problem
My 94 4.0L Jeep Cherokee has developed a blower motor problem.
This started out as intermittency. I'd start the jeep, and turn on the AC, but the blower would not come on. I would feel cold air at the vents. After driving for a while, the blower would come on and run just fine. My wife advised me that hitting the dash would also occasionally turn it on. This week, the blower has refused to come on at all, either for vent, AC or Heat. I can still hear the AC kicking up. I replaced the blower motor speed switch, but still no airflow. I followed the wiring down to the blower resistor block, and I see strong voltage at the twin green wires. I've checked all the fuses in the interior and engine compartment, all ok. Is there a relay on this year model for the blower that I've failed to find? If so, where would I look? The intermittent behavior makes me suspect a relay, but my Haynes manual is pretty useless on this point. If there is no relay, how would I access the blower motor to check it out? Looking under the passenger footwell, I can see the squirrel cage, but I've no idea how I'd get to the motor. Thanks very much. S |
Re: 94 Cherokee blower motor problem
The relay switch in the Power Distribution Center, the box by your
battery, it only works in the high speed switch position: http://www.----------.com/blower.pdf God Bless America, Bill O|||||||O mailto:-------------------- fraserwag@yahoo.com wrote: > > My 94 4.0L Jeep Cherokee has developed a blower motor problem. > > This started out as intermittency. I'd start the jeep, and turn on > the AC, but the blower would not come on. I would feel cold air at the > vents. After driving for a while, the blower would come on and run > just fine. My wife advised me that hitting the dash would also > occasionally turn it on. > > This week, the blower has refused to come on at all, either for vent, > AC or Heat. I can still hear the AC kicking up. > > I replaced the blower motor speed switch, but still no airflow. I > followed the wiring down to the blower resistor block, and I see strong > voltage at the twin green wires. I've checked all the fuses in the > interior and engine compartment, all ok. > > Is there a relay on this year model for the blower that I've failed > to find? If so, where would I look? The intermittent behavior makes > me suspect a relay, but my Haynes manual is pretty useless on this > point. > > If there is no relay, how would I access the blower motor to check it > out? Looking under the passenger footwell, I can see the squirrel > cage, but I've no idea how I'd get to the motor. > > Thanks very much. > > S |
Re: 94 Cherokee blower motor problem
The relay switch in the Power Distribution Center, the box by your
battery, it only works in the high speed switch position: http://www.----------.com/blower.pdf God Bless America, Bill O|||||||O mailto:-------------------- fraserwag@yahoo.com wrote: > > My 94 4.0L Jeep Cherokee has developed a blower motor problem. > > This started out as intermittency. I'd start the jeep, and turn on > the AC, but the blower would not come on. I would feel cold air at the > vents. After driving for a while, the blower would come on and run > just fine. My wife advised me that hitting the dash would also > occasionally turn it on. > > This week, the blower has refused to come on at all, either for vent, > AC or Heat. I can still hear the AC kicking up. > > I replaced the blower motor speed switch, but still no airflow. I > followed the wiring down to the blower resistor block, and I see strong > voltage at the twin green wires. I've checked all the fuses in the > interior and engine compartment, all ok. > > Is there a relay on this year model for the blower that I've failed > to find? If so, where would I look? The intermittent behavior makes > me suspect a relay, but my Haynes manual is pretty useless on this > point. > > If there is no relay, how would I access the blower motor to check it > out? Looking under the passenger footwell, I can see the squirrel > cage, but I've no idea how I'd get to the motor. > > Thanks very much. > > S |
Re: 94 Cherokee blower motor problem
The relay switch in the Power Distribution Center, the box by your
battery, it only works in the high speed switch position: http://www.----------.com/blower.pdf God Bless America, Bill O|||||||O mailto:-------------------- fraserwag@yahoo.com wrote: > > My 94 4.0L Jeep Cherokee has developed a blower motor problem. > > This started out as intermittency. I'd start the jeep, and turn on > the AC, but the blower would not come on. I would feel cold air at the > vents. After driving for a while, the blower would come on and run > just fine. My wife advised me that hitting the dash would also > occasionally turn it on. > > This week, the blower has refused to come on at all, either for vent, > AC or Heat. I can still hear the AC kicking up. > > I replaced the blower motor speed switch, but still no airflow. I > followed the wiring down to the blower resistor block, and I see strong > voltage at the twin green wires. I've checked all the fuses in the > interior and engine compartment, all ok. > > Is there a relay on this year model for the blower that I've failed > to find? If so, where would I look? The intermittent behavior makes > me suspect a relay, but my Haynes manual is pretty useless on this > point. > > If there is no relay, how would I access the blower motor to check it > out? Looking under the passenger footwell, I can see the squirrel > cage, but I've no idea how I'd get to the motor. > > Thanks very much. > > S |
Re: 94 Cherokee blower motor problem
I fixed my '93 Grand Cherokee by just cleaning out the cage. It would work
on high but not low or second. It didn't have a lot of debris in it, just a couple small leaves, but it made a world of difference just pulling it down and cleaning it out. My 2 cents. D Oh, my wife is a dashboard slugger too. Same thing, she'd fix it by slugging. (fixes me too sometimes) <fraserwag@yahoo.com> wrote in message news:1157245906.213706.30540@i3g2000cwc.googlegrou ps.com... > My 94 4.0L Jeep Cherokee has developed a blower motor problem. > > This started out as intermittency. I'd start the jeep, and turn on > the AC, but the blower would not come on. I would feel cold air at the > vents. After driving for a while, the blower would come on and run > just fine. My wife advised me that hitting the dash would also > occasionally turn it on. > > This week, the blower has refused to come on at all, either for vent, > AC or Heat. I can still hear the AC kicking up. > > I replaced the blower motor speed switch, but still no airflow. I > followed the wiring down to the blower resistor block, and I see strong > voltage at the twin green wires. I've checked all the fuses in the > interior and engine compartment, all ok. > > Is there a relay on this year model for the blower that I've failed > to find? If so, where would I look? The intermittent behavior makes > me suspect a relay, but my Haynes manual is pretty useless on this > point. > > If there is no relay, how would I access the blower motor to check it > out? Looking under the passenger footwell, I can see the squirrel > cage, but I've no idea how I'd get to the motor. > > Thanks very much. > > S > |
Re: 94 Cherokee blower motor problem
I fixed my '93 Grand Cherokee by just cleaning out the cage. It would work
on high but not low or second. It didn't have a lot of debris in it, just a couple small leaves, but it made a world of difference just pulling it down and cleaning it out. My 2 cents. D Oh, my wife is a dashboard slugger too. Same thing, she'd fix it by slugging. (fixes me too sometimes) <fraserwag@yahoo.com> wrote in message news:1157245906.213706.30540@i3g2000cwc.googlegrou ps.com... > My 94 4.0L Jeep Cherokee has developed a blower motor problem. > > This started out as intermittency. I'd start the jeep, and turn on > the AC, but the blower would not come on. I would feel cold air at the > vents. After driving for a while, the blower would come on and run > just fine. My wife advised me that hitting the dash would also > occasionally turn it on. > > This week, the blower has refused to come on at all, either for vent, > AC or Heat. I can still hear the AC kicking up. > > I replaced the blower motor speed switch, but still no airflow. I > followed the wiring down to the blower resistor block, and I see strong > voltage at the twin green wires. I've checked all the fuses in the > interior and engine compartment, all ok. > > Is there a relay on this year model for the blower that I've failed > to find? If so, where would I look? The intermittent behavior makes > me suspect a relay, but my Haynes manual is pretty useless on this > point. > > If there is no relay, how would I access the blower motor to check it > out? Looking under the passenger footwell, I can see the squirrel > cage, but I've no idea how I'd get to the motor. > > Thanks very much. > > S > |
Re: 94 Cherokee blower motor problem
I fixed my '93 Grand Cherokee by just cleaning out the cage. It would work
on high but not low or second. It didn't have a lot of debris in it, just a couple small leaves, but it made a world of difference just pulling it down and cleaning it out. My 2 cents. D Oh, my wife is a dashboard slugger too. Same thing, she'd fix it by slugging. (fixes me too sometimes) <fraserwag@yahoo.com> wrote in message news:1157245906.213706.30540@i3g2000cwc.googlegrou ps.com... > My 94 4.0L Jeep Cherokee has developed a blower motor problem. > > This started out as intermittency. I'd start the jeep, and turn on > the AC, but the blower would not come on. I would feel cold air at the > vents. After driving for a while, the blower would come on and run > just fine. My wife advised me that hitting the dash would also > occasionally turn it on. > > This week, the blower has refused to come on at all, either for vent, > AC or Heat. I can still hear the AC kicking up. > > I replaced the blower motor speed switch, but still no airflow. I > followed the wiring down to the blower resistor block, and I see strong > voltage at the twin green wires. I've checked all the fuses in the > interior and engine compartment, all ok. > > Is there a relay on this year model for the blower that I've failed > to find? If so, where would I look? The intermittent behavior makes > me suspect a relay, but my Haynes manual is pretty useless on this > point. > > If there is no relay, how would I access the blower motor to check it > out? Looking under the passenger footwell, I can see the squirrel > cage, but I've no idea how I'd get to the motor. > > Thanks very much. > > S > |
Re: 94 Cherokee blower motor problem
L.W.(Bill) ------ III wrote: > The relay switch in the Power Distribution Center, the box by your > battery, it only works in the high speed switch position: > http://www.----------.com/blower.pdf > God Bless America, Bill O|||||||O > mailto:-------------------- > > fraserwag@yahoo.com wrote: > > > > My 94 4.0L Jeep Cherokee has developed a blower motor problem. > > > > This started out as intermittency. I'd start the jeep, and turn on > > the AC, but the blower would not come on. I would feel cold air at the > > vents. After driving for a while, the blower would come on and run > > just fine. My wife advised me that hitting the dash would also > > occasionally turn it on. > > > > This week, the blower has refused to come on at all, either for vent, > > AC or Heat. I can still hear the AC kicking up. > > > > I replaced the blower motor speed switch, but still no airflow. I > > followed the wiring down to the blower resistor block, and I see strong > > voltage at the twin green wires. I've checked all the fuses in the > > interior and engine compartment, all ok. > > > > Is there a relay on this year model for the blower that I've failed > > to find? If so, where would I look? The intermittent behavior makes > > me suspect a relay, but my Haynes manual is pretty useless on this > > point. > > > > If there is no relay, how would I access the blower motor to check it > > out? Looking under the passenger footwell, I can see the squirrel > > cage, but I've no idea how I'd get to the motor. > > > > Thanks very much. > > > > S Thanks, Bill. I took a look there yesterday. Turning the lid over, I see there is labels indicating the role of the various relays and fuses, but none mention the blower motor. There is a fuse and relay for the aux. fan, but it comes on when I turn the selector to AC, so I'm good there. All the fuses check out ok. I've tapped all the relays, and they test ok. I'll keep looking. Thanks again. |
Re: 94 Cherokee blower motor problem
L.W.(Bill) ------ III wrote: > The relay switch in the Power Distribution Center, the box by your > battery, it only works in the high speed switch position: > http://www.----------.com/blower.pdf > God Bless America, Bill O|||||||O > mailto:-------------------- > > fraserwag@yahoo.com wrote: > > > > My 94 4.0L Jeep Cherokee has developed a blower motor problem. > > > > This started out as intermittency. I'd start the jeep, and turn on > > the AC, but the blower would not come on. I would feel cold air at the > > vents. After driving for a while, the blower would come on and run > > just fine. My wife advised me that hitting the dash would also > > occasionally turn it on. > > > > This week, the blower has refused to come on at all, either for vent, > > AC or Heat. I can still hear the AC kicking up. > > > > I replaced the blower motor speed switch, but still no airflow. I > > followed the wiring down to the blower resistor block, and I see strong > > voltage at the twin green wires. I've checked all the fuses in the > > interior and engine compartment, all ok. > > > > Is there a relay on this year model for the blower that I've failed > > to find? If so, where would I look? The intermittent behavior makes > > me suspect a relay, but my Haynes manual is pretty useless on this > > point. > > > > If there is no relay, how would I access the blower motor to check it > > out? Looking under the passenger footwell, I can see the squirrel > > cage, but I've no idea how I'd get to the motor. > > > > Thanks very much. > > > > S Thanks, Bill. I took a look there yesterday. Turning the lid over, I see there is labels indicating the role of the various relays and fuses, but none mention the blower motor. There is a fuse and relay for the aux. fan, but it comes on when I turn the selector to AC, so I'm good there. All the fuses check out ok. I've tapped all the relays, and they test ok. I'll keep looking. Thanks again. |
Re: 94 Cherokee blower motor problem
L.W.(Bill) ------ III wrote: > The relay switch in the Power Distribution Center, the box by your > battery, it only works in the high speed switch position: > http://www.----------.com/blower.pdf > God Bless America, Bill O|||||||O > mailto:-------------------- > > fraserwag@yahoo.com wrote: > > > > My 94 4.0L Jeep Cherokee has developed a blower motor problem. > > > > This started out as intermittency. I'd start the jeep, and turn on > > the AC, but the blower would not come on. I would feel cold air at the > > vents. After driving for a while, the blower would come on and run > > just fine. My wife advised me that hitting the dash would also > > occasionally turn it on. > > > > This week, the blower has refused to come on at all, either for vent, > > AC or Heat. I can still hear the AC kicking up. > > > > I replaced the blower motor speed switch, but still no airflow. I > > followed the wiring down to the blower resistor block, and I see strong > > voltage at the twin green wires. I've checked all the fuses in the > > interior and engine compartment, all ok. > > > > Is there a relay on this year model for the blower that I've failed > > to find? If so, where would I look? The intermittent behavior makes > > me suspect a relay, but my Haynes manual is pretty useless on this > > point. > > > > If there is no relay, how would I access the blower motor to check it > > out? Looking under the passenger footwell, I can see the squirrel > > cage, but I've no idea how I'd get to the motor. > > > > Thanks very much. > > > > S Thanks, Bill. I took a look there yesterday. Turning the lid over, I see there is labels indicating the role of the various relays and fuses, but none mention the blower motor. There is a fuse and relay for the aux. fan, but it comes on when I turn the selector to AC, so I'm good there. All the fuses check out ok. I've tapped all the relays, and they test ok. I'll keep looking. Thanks again. |
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