2001 Dodge Grand Caravan - Fan Speed?-Fixed
-
- 400 Club: Mega-Star Contributor
- Posts: 481
- Joined: Thu Sep 23, 2010 8:48 am
- Location: greenville sc
2001 Dodge Grand Caravan - Fan Speed?-Fixed
Manual A/C with rear A/C.
We replaced Fr blower motor about a month ago. There does not seem to be any difference in fan speed between 4 and High. We have measured the amperage at the fan when the switch is moved and there is no change. Seems a no brainer. Replace the switch. Just to be sure we applied power to the blower with a probe and we cannot feel a significant difference then either. Now I am scratching my head. Oh, no cabin air filter, just so we dont go there.
What am I missing here folks?
We replaced Fr blower motor about a month ago. There does not seem to be any difference in fan speed between 4 and High. We have measured the amperage at the fan when the switch is moved and there is no change. Seems a no brainer. Replace the switch. Just to be sure we applied power to the blower with a probe and we cannot feel a significant difference then either. Now I am scratching my head. Oh, no cabin air filter, just so we dont go there.
What am I missing here folks?
-
- 2.5K Uber Ninja Contributor
- Posts: 2642
- Joined: Wed Feb 04, 2009 1:28 pm
- Location: PA
Re: 01 dodge gr caravan blower
First thing I am thinking of is a blower motor resistor failure. Dealer item only. Have seen a few of these fail over the years.
-
- 400 Club: Mega-Star Contributor
- Posts: 481
- Joined: Thu Sep 23, 2010 8:48 am
- Location: greenville sc
Re: 01 dodge gr caravan blower
Doesn't it just bypass resistor on high? and why does it not blow harder when we apply power with the probe? That is what has me scratching?
- ricmorin
- 5K Holy Smokes Contributor
- Posts: 5970
- Joined: Mon Jul 25, 2005 10:11 am
- Location: New Hampshire
- Contact:
Re: 01 dodge gr caravan blower
It's possible that the blower resistor has failed in such a way that speed 4 is no longer a resistor but straight through power. If that's the case, then position 4 and 5 would be identical. To eliminate the possibility of a blower problem, substitute a load like a headlight bulb, then visually see if there is a difference between the two speeds. You should also check amperage with the bulb. If test results are the same, then it must be the resistor. There's a slight chance that the windings in the replacement blower are such that they draw the same with 2 different speeds. It's not likely, but the bulb will help isolate the issue.
HTH,
Ric
HTH,
Ric
Ric Morin - Volunteer Forum Moderator, Shop Owner, ASE Master L1
Motorcar Alternatives, LLC
603-622-6434 x203
www.motorcaralternatives.com
I find my life is a lot easier when I use Special Orders
Motorcar Alternatives, LLC
603-622-6434 x203
www.motorcaralternatives.com
I find my life is a lot easier when I use Special Orders
-
- 2.5K Uber Ninja Contributor
- Posts: 2642
- Joined: Wed Feb 04, 2009 1:28 pm
- Location: PA
Re: 2001 Dodge Grand Caravan - Fan Speed?
That was my initial thought, that the resistor failed on the fourth speed. But you bring up a good idea of checking it with a load.
-
- 400 Club: Mega-Star Contributor
- Posts: 481
- Joined: Thu Sep 23, 2010 8:48 am
- Location: greenville sc
Re: 2001 Dodge Grand Caravan - Fan Speed?
tnx Ric and Tim... retesting now
- liljoe
- 1500 Club Master Plus Contributor
- Posts: 1636
- Joined: Thu Sep 21, 2006 6:27 am
- Location: Mentally: outer space. Physically: Alabama
- Contact:
Re: 2001 Dodge Grand Caravan - Fan Speed?
I had a GM once that had failed in the past and some had by-passed the highest speed resistor with a connector and on next to high it was blowing same as high. Might be worth looking at.....
Working hard to prove the Green Team can do it with the best of 'em.
Always remember: AIN'T NO FREE LUNCHES!!
Am I the Only One?- I don't think I am.
The further a society retreats from the truth, the more it hates those who speak it. George Orwell.
Always remember: AIN'T NO FREE LUNCHES!!
Am I the Only One?- I don't think I am.
The further a society retreats from the truth, the more it hates those who speak it. George Orwell.
- steven kiser
- 5K Holy Smokes Contributor
- Posts: 6184
- Joined: Fri Jul 06, 2007 4:58 am
- Location: eastern ma.
Re: 2001 Dodge Grand Caravan - Fan Speed?
another little thing here. i've run into the plug at the resistor is melted internally and is shorting to power. also look at the ground wire where it attaches to the body. i've seen them slightly loose and the insulation melted back. a loose ground will cause an issue like this one.
never argue with a fool, they'll drag you down to their level and beat you with experience
-
- 2.5K Uber Ninja Contributor
- Posts: 2642
- Joined: Wed Feb 04, 2009 1:28 pm
- Location: PA
Re: 2001 Dodge Grand Caravan - Fan Speed?
Ah yes steve, I forgot about the wiring harness on them resistors. I usually replace them as well cause it seems they may be the issue, I haven't quite got figured exactly if the poor contact at the wiring harness causes the resistor to fail or how that is. They can be rather difficult to get.
-
- 400 Club: Mega-Star Contributor
- Posts: 481
- Joined: Thu Sep 23, 2010 8:48 am
- Location: greenville sc
Re: 2001 Dodge Grand Caravan - Fan Speed?
Well... call me a monkeys uncle. The resistor was bad on setting 4 and was blowing on high at that point. I have not seen one do that before. Thanks for the help. Sometimes it is hard to get out of my own way.
- steven kiser
- 5K Holy Smokes Contributor
- Posts: 6184
- Joined: Fri Jul 06, 2007 4:58 am
- Location: eastern ma.
Re: 2001 Dodge Grand Caravan - Fan Speed?-Fixed
thanks for posting the fix.
never argue with a fool, they'll drag you down to their level and beat you with experience