so my fan quit blowing back in the summer...first it only worked on 2 speeds..then 1..then I had to turn it off and on real fast to get it to come on...then nothing...so I was thinking bad switch..I jumped the fan to the battery..it came on and had been replaced recently anyway so I dont think its the blower...so I replaced the switch in the dash today and I still got nothing..and man its cold...any help?????? thanks a bunch

 

I haven't had this problem myself but I've heard of it. If no one else responds soon do a search and type in "resistor" or "resistor block". In so far as I know all vehicles have a group of three or so in a package and these control the speed of the fan. Regards

 

Yep, replace the speed resistor, it's about $15 from the dealer. Look under the hood, passenger side, on the top of the big black box that the fan mounts into. There you'll find a 4-wire plug attached to the resistor which is held in by 2 screws/bolts. If the wires are burnt or broken, you'll need to ask for the pigtail repair kit from the dealer as well.

 

Replaced it today...still nothing..I also replaced the relay..nothing...am I missing something ..i checked the fuses..replaced the switch replaced resistor...replaced the relay..the wiring harness that plugs into the resistor looks a little funky..could that cause it..I tried to shake it to see if it was a bad connection..I'm at my end with this truck..every month its something

 

Since even the "high" position on the fan switch was also not working then there is another problem.

Before I installed a replacement blower motor resistor pack my high speed was the only speed working. In almost all cases if the resistor pack is blown the high speed will work.

This may or not be it for yours, all summer since I custom modified my resistor block (melted harness and block) mine all of a sudden would stop working on all of the speeds, did the fan switch trick of turning it off and on and several times it would work for a day to few days before repeating. Turn out that when the blower motor had been replaced in the pass & that the mechanic used 'butt splices' on the connecting wire, one had broken so that engine vibration could open the connection and shut down the fan motor. Check the motor connections

If you can tell us the year and model of your van I may be able to help with an electrical schematic of your system. I would also need to know if your van has rear heat, and AC.

 

Like I said...

 

...not ignoring your post...but there are no burnt or broken wires...the plug itself looks kinda like its been hot...the van is a 99 3500...no rear air..thanks for everyones help

 

Do you have an email where I can send them to you? There are three jpg's that are too big to fit due to the settings of this forum. If you want send your email by PM and I will send the pics to you.

 

PM sent thanks