Blower speeds

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Dec 25, 2015 | 07:20 PM

johnpalmer00

Thread Starter

Junior Member

Joined: May 2010

Posts: 37

Likes: 0

From: Portland Oregon

Year: 92

Model: Cherokee

Engine: 4.0l

Blower speeds

So I had no heat so I replaced the blower motor resistor. Now it works but only on the second and third speed setting. Switched out the control panel thinking it might be the fan speed switch. No change. Im fairy certain that its a good resistor, not a Mopar but its from Napa. Any ideas? Ive thought about running 12v directly to the resistor to see what would happen... Any ideas?

Dec 25, 2015 | 11:31 PM

freegdr

CF Veteran

Joined: Mar 2010

Posts: 47,923

Likes: 38

From: Broward County Fl.

Year: 1989 xj sport 2dr

Model: Cherokee

Engine: 12 hole bosch Injectors

Check resistor post with test light/meter for power.

Dec 26, 2015 | 07:13 AM

CCKen

CF Veteran

Joined: Aug 2010

Posts: 8,357

Likes: 103

From: Canton, MI

Year: 1999

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by johnpalmer00

So I had no heat so I replaced the blower motor resistor. Now it works but only on the second and third speed setting. Switched out the control panel thinking it might be the fan speed switch. No change. Im fairy certain that its a good resistor, not a Mopar but its from Napa. Any ideas? Ive thought about running 12v directly to the resistor to see what would happen... Any ideas?

That control panel you installed may have a defective blower speed switch. NAPA sells blower speed switches.

Here's the blower circuit for a 1990 XJ. It should be the same wire colors as a 1991.

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