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Cooling Fan problems

7 messages,  Last post on Oct 08, 2010 at 7:17 PM

You are in the Chevy Venture Forum.

What is this discussion about? Pontiac Montana, Chevrolet Venture, Chevrolet Astro, Electrical, Van

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#1 of 7 Cooling Fan problems by gearhead351w

Mar 11, 2009 (10:44 am)

Well I did the head gaskets and changed the crank,cam,o2, and ect sensors. The van runs great but the cooling fans are not coming on. I have waited till it almost over heats and I turn the heaters on and bring the temp down. Now I have gone thru the manuel and I know that the fans and relays are good by jumping the ground on and the fans will go into low and high speed but they will not come on by themself the guage is reading temp and I do not have any codes that pertain to the ect? I do not have a scaner that will tell me what the van temp is (cheap scaner) could the guage be off? I am begining to think I am going to have to take it to the dealer (I dont want to do that kinda of a pride thing) HELP PLEASE

#2 of 7 Fan motors inop by rdn1

Apr 07, 2009 (6:43 am)

I changed the battery in my wifes 2002 venture. Now the rad fan motors will not work. I have checked the fuse and the relays, the only time the fans will come on is if you turn on the ac or defrost and then they only work on low. Any body run in to this before?

#3 of 7 Re: Fan motors inop [rdn1] by moakus

Aug 14, 2009 (7:53 pm)

Replying to: rdn1 (Apr 07, 2009 6:43 am)
Hey, Im having the same problem. I just replaced the temp switch and it is still not working. Did you ever get yours resolved?

#4 of 7 Re: Fan motors inop [moakus] by gearhead351w

Aug 14, 2009 (10:26 pm)

Replying to: moakus (Aug 14, 2009 7:53 pm)
my problem was as I thought the gauge was off but if you get a manual it should have the wire diagram in it remember that the computer turns on and off the ground to the fans

#5 of 7 Re: Fan motors inop [gearhead351w] by chuck136

Sep 16, 2010 (8:11 pm)

Replying to: gearhead351w (Aug 14, 2009 10:26 pm)
I, also, have the same problem with the fans. I've replaced all relays and coolant temp sensor. Passenger fan will come on with the AC on but will start to overheat without turning on AC. I know it is above temp for fans its starting to boil. I've hooked up a tech 2 device and cannot command on the low speed fans. I can jump the driver side fan and it works just fine. Question since the fans are controlled by the computer could the computer be bad.

#7 of 7 Re: Fan motors inop [chuck136] by chuck136

Oct 08, 2010 (7:17 pm)

Replying to: chuck136 (Sep 16, 2010 8:11 pm)
I have finally solved the fan problem. I replaced the ground wire from the fuse box to the ecm(computer). Everything working great. Check engine light off and both fans run as they should.
 
I don't know how one wire in a big bundel can go bad but it did.

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