TheClaw

On top of needing a new heater core, my blower switch just gave out. Only turns the blower on #4. Numbers 1, 2, 3 inop. I have a similar problem on our 2003 TJ except that it's only the #2 that is dead. Is this just a switch problem or something worse?

cpttuna

check the blower motor resistor

dave1123

TheClaw

Where would it be located and how would you test it? (I hate electrical gremlins)

dave1123

If I remember correctly, it's under a cover with the fan underneath the glovebox.

jordan96xj

Passenger Foot Well:

TheClaw

Wow, that couldn't be easier. thanks much. Guessing its about the same for the TJ. Have the same problem on the kids '03 Wrangler.

PCO6

It's a little harder to get to on a TJ but not that bad. Remove the glove box door and make your way to the right and down a bit. You'll have to push a few wires out the way and use a 5/16" socket (I think) to remove 2 screws.

I replaced the one in my '03 TJ a few weeks ago. The one I replaced was a MOPAR blower resistor (pt.# 5139719AA) and I only got 5 years out of it. This time I got one from NAPA (Echlin pt.# BR256) and so far so good.

TheClaw

Got it! The real problem was getting that damned kick cover off. Four screws, two easy to find the other two next to invisible.

Looks like it was a little cooked, no?

Thanks for the help.

Turbo X_J

^
Connector is probably FUBAR

dave1123

Most of the reasons the resistor gets toasted is because of high amperage draw from bad fan motor bearings. It's a good idea to replace the fan at the same time you re-do the resistor.

TheClaw

Connector is good. Everything works. Even getting some heat after flushing the heater core.

dave1123

If it fries again soon, replace the fan. Been there. You can help save it by turning the mode switch to off leaving the fan switch to 4, then turning down the blower speed after starting it up. That way the inrush current won't burn the resistor.

TheClaw

Thanks