Just got a 99 dodge ram 1500 5.2L. When I am idling the blower motor works great on every setting. However, when I am driving down the road and I accelerate the blower motor cuts off until I let off of the gas, and then blows until the next acceleration. Never had this issue before. This is my first dodge and I wondered if anyone else has had this issue. Thanks.

 

Are you sure it's not just switching to the defroster vents? That's a more common problem.

 

I haven't checked to feel but I believe it's just cutting off. When it's on the highest setting I can hear it blowing pretty well but when it happens I hear absolutely nothing from the blower.

 

You could run a voltmeter to the blower fuse, then try your test to see if your are loosing voltage. At least it would be a place to begin at.

 

I stand corrected. Yes, it seems to switch over simply to defroster vents and weakens in force. What might be the cause of this problem? Vaccuum perhaps?

 

Yes vacuum. Either a bad hose (unlikely) or a bad check valve (99.99% of the time). NAPA sells the right ones but I don't know the part#

 

Several threads about it in the FAQ section. Including part numbers.

 

Awesome, thank you. That makes perfectly good sense.

 

Glad you mentioned it switching over to defrosters. Thanks.

 

Look for "Wild Vents".