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You're asking about replacing the blower motor resistor, but it sounds like you're not even sure if replacing the resistor will even resolve your problem or is the cause of your problem? Furthermore it sounds like you don't even know what the problem is? Let's not guess here Jim. Guessing is only a waste of your time and money. Right now the best thing you can do is post the signs and symptoms of your problem. Those indications could reveal what your problem actually is. On the other hand, if the heating or cooling system in truck is behaving in a manner that is out of the accepted norm, you should post that behaviour as well. Have I confused you? Sorry if I have. Simply stated Jim just post what your problem is and why you feel the problem has anything to do with the resistor?

Thank You
Helene

Problem is,heater motor fan

Submitted by jimj on Sun, 01/01/2012 - 16:10.

Problem is,heater motor fan works occasionally. When working, high setting is not much more than low setting( it seems to speed up when turning right). Fan stopped working totally till I wiggeled resistor harness and tapped on blower motor. Worked for awhile and stopped again. Did the tap and wiggel again but no go. What do You think? Thanks, Jim

jim, Helene is my girlfriend,

Submitted by Big Block 409 on Sun, 01/01/2012 - 16:44.

jim,

Helene is my girlfriend, and she's gonna be away till this coming Friday. What made the biggest difference?

Tapping on the motor or jiggling the wire harness at the resistor?

Try cleaning the connections at the resistor and makin sure they are on tight?

Ok, will give it a try and

Submitted by jimj on Sun, 01/01/2012 - 17:10.

Ok, will give it a try and let you know. Thanks again, Jim

Gave it a try,cleaned and

Submitted by jimj on Sun, 01/01/2012 - 21:47.

Gave it a try,cleaned and secured the connection, also tapped the fan blower as best as I could and still no fan action.I have a new resistor and i'd like to try that first, but I need some guidance in removing and replacing resistor. Any help will be appreciated. Thanks, Jim

Jimj, Have you checked for a

Submitted by drivability on Sun, 01/01/2012 - 22:50.

Jimj,

Have you checked for a good power and ground source at the blower?

Yes all is clean and secured

Submitted by jimj on Mon, 01/02/2012 - 11:56.

Yes all is clean and secured

Jim, Hold off on replacin the

Submitted by Big Block 409 on Mon, 01/02/2012 - 04:58.

Jim,

Hold off on replacin the resistor for now. Do this but understand it's just a test and not a permanent solution. Jump the fan directly to the trucks battery with a pair of jumper leads comin off the battery. If the fan works now reverse the leads (to reverse the polarity) and connect them to the fan again. The fan is good and does NOT need to be replaced as long as it works in both directions. (jumper leads connected then connected in reverse polarity). If the fan only works in one position then you gotta replace it. Get back to us with the results from the above test BEFORE you replace the resistor. We'll tell you how to replace the resistor.

ok, will give it a try and

Submitted by jimj on Mon, 01/02/2012 - 11:59.

ok, will give it a try and let you know.

Jim, Sorry man, but I forgot

Submitted by Big Block 409 on Mon, 01/02/2012 - 12:26.

Jim,

Sorry man, but I forgot to include something in my last answer. Even if the motor checks out and BEFORE you replace the resistor, you gotta check the switch itself for continuity in all positions. You do that with a voltmeter or multi-meter set on continuity. At that point if the switch checks out, then replace the resistor.

Jimj, You said "Yes all is

Submitted by drivability on Mon, 01/02/2012 - 16:27.

Jimj,

You said "Yes all is clean and secured" when I asked you if you had checked for power and ground. If you have power and ground to the blower motor and the motor still doesn't work, then you have a faulty motor.

I'm going to word the question a little differently. When the blower fails to work, have you checked at the blower motor connector (with a meter or atleast a test light) to see if you have proper power and ground to the motor?

Also, I appreciate that you took the time to use the "reply" feature to respond to us and that's fine if you wish to do so but it can actually make it easier to follow your progress if you click on "post new answer". Thanks.

Jim, Bump Bump. Just tryin to

Submitted by Big Block 409 on Tue, 01/03/2012 - 12:47.

Jim,

Bump Bump.
Just tryin to help you.
Haven't seen a response or answer from you.
Really doesn't matter to me.
This is your problem.
Just tryin to help you.
Post an update if you want.
Otherwise good luck.

Only been one day since last

Submitted by drivability on Tue, 01/03/2012 - 19:27.

Only been one day since last response. Take your time and let us know when you get around to it or if you need any other help. Also, if you would post your final repair info, that could help other readers. Thanks.

Sorry guys I didn't get back

Submitted by jimj on Tue, 01/03/2012 - 20:39.

Sorry guys I didn't get back sooner, some other issue came up, but I plan on getting back to work on the Jimmy tommorrow.I'll try out what you guys have suggested and will get back to you all with the results. Thanks again for all the help. JimJ

Jimj, Good deal. Thanks for

Submitted by drivability on Tue, 01/03/2012 - 20:47.

Jimj,

Good deal. Thanks for keeping us informed. Don't rush for our sake.

Jim, Not tryin to rush you.

Submitted by Big Block 409 on Wed, 01/04/2012 - 03:34.

Jim,

Not tryin to rush you. Just wanted to make sure that you weren't stuck or that a new problem didn't come up. Online forum remember? We gotta ask questions so we know where we're at.

Well guys, I got back to work

Submitted by jimj on Thu, 01/05/2012 - 09:45.

Well guys, I got back to work on the Jimmy yesterday, and lo and behold, I got the blower working again. I forgot to mention earlier that the Jimmy had been sitting for a good six months before I took her back on the road. A friend told Me that the brushes in the motor can freeze up when sitting so long and to try tapping the hub on the back of the motor while turning the switch thru the speed cycles. So I gave it a shot before running the tests and sure enough, after a few taps, the blower kicked right over and is running just like it did in its heyday. Hopefully it keeps working and if it does't, you'll be seeing Me back on the board. Thanks to all who have taken the time to share Your knowledge and guidence.
JimJ