Need help

[bigike55]

I just bought a new heater control switch for my 72 chevy c20 pickup. when I go down the road the air blows nice and hot from floor to defrost depending what I put it on but the air wont blow when iam in park any help would be great. iam young so I don't know a lot about these trucks I always thought they looked cool so I finally got the chance to buy one so I did. thanks again.

http://sphotos-b.xx.fbcdn.net/hphoto...12972378_n.jpg

[landy]

You may need to state your problem more clearly. Are you saying that when the truck is idling, the fan doesn't work at any speed setting, or the fan does work, but there's no warm air coming from any of the vents, or something else?

[bigike55]

yea when iam in idle with the truck on I cant get no air flow through the vents. but when iam driving 65 mph or so the air blows fine is that just cause iam moving and maybe the fan isn't kicking in.

[68gmsee]

Can you hear the fan? Does it run when driving slow?

The truck moving or sitting at idle shouldn't affect the blower motor.

[69GWC]

Yes make sure your an is working first, kinda a werid problem if it wont work at idle but will at speed..
Posted via Mobile Device

[bigike55]

what fan are you talking about. sorry I feel stupid asking that but I don't know much the big fan that cools the radiator is turning. or is there another fan? thanks

[Stocker]

The heater fan (blower motor) under the dash on the passenger side.


BTW welcome to the site from NorCal.

[68gmsee]

Google search for 67-72 chevy truck blower motor or heater. Lots of pics in images of what you the heater box looks like. Blower motor is in the engine compartment.

[bigike55]

thank you for the welcome. iam from Kansas. no the fan isn't blowing it mounted under the hood right by the firewall I traced the wire coming off it back into the cab and it runs up to the switch and a wire comes off it and runs over the the fuse panel but it is just hanging there not pluged into anything? do I plug it into a constant hot fuse or what?

[Stocker]

Sorry about the bad info above (blower motor under dash).... that's where it is in my other truck and I lost my head for a moment.....

The fuse box should be marked (might be hard to read) so you can find the correct fuse and rating for the fuse. The wire might be off for a reason though, the fuse box could be bad where that fuse sits. If you connect the wire to a hot lug, make sure it's only hot when the ignition is on. You'll need to also wire it through an inline fuse.

[bigike55]

ok thanks for the the help guys I will try this today and if it don't work I will be back on later to ask more questions. lol btw is lmc truck the best place to get interior parts cause the whole interior needs redone

[bigike55]

ok I took the wire and put it on hot just to see if the blower motor would come on it does. so now all I need to do is put a in line fuse in it and then put it to a fuse in the fuse box that just comes on when I turn the key correct? thanks again guys

[Stocker]

You only need an inline fuse if you connect to an unfused lug on the fuse panel. If you are able to connect to an existing fuse in the panel, there will be no need for an inline fuse.

And yes, you want a source that is only hot when the ignition is on.

[bigike55]

yea I put it to the one that says air conditioning without a inline fuse and it seems to work the way its suppose to thanks this forum has really helped today.

[Stocker]

Glad to hear it's working! Hope you stick around, there's a lot of knowledge on this board and plenty of folks willing to help.

Looks like a very nice C20 you have there!

[bigike55]

Thanks for the comment on my truck and don't worry I will stick around cause there is a lot more I want to do with my truck wich Iam sure I will have ?'s thanks
Posted via Mobile Device