[chevyguy1969]

my A/C blowetr motor was working all right till the other day now it only blows at low seting when you move the fan speed lever to high the fan speed doesn't change i have very little experance with this system can some piont me in the general direction so i can try to fix this. it is hotter than hell in a black car in AZ much less with no cool air. :cheers:

 

[Rip]

Could be the high speed relay.......located on the evaperator box....passenger side. Still on my first cup of coffee, but seems like it has a 3 prong plug going to it from the under side along with a single prong also going to it from the under side. I have a pic stashed somewhere.......will post if I can find it.

 

[Rip]

Here's a pic of the relay with the 2 plugs (4 wires) disconnected. The relay is just my first guess.....
Hope this helps.

 

[SIXFOOTER]

This may help some. Its for an 81 but I don't think it changed much

 

[mrvette]

On my '72, the odds are for that pesky 30 amp fuse in that stupid white fuse holder, located just aft of the horn relay/power dist tie point on the drivers' fender liner, it's the high speed fuse going directly to the relay...the holder gets corrosion in there, heats the fuse ends, melts the solder in the fuse, fuse looks good, but it's not....fought this on many a GM car...MY cure for my '72 here was to skin the wire ends, and put under a 40 amp circuit breaker type fuse with screw terminals...you could wire in a 30 amp mini fuse, and be much better off with the attendant rubber holder, either one is fine....

but replaceing with another white factory type fuse holder has proven futile over time, for me...

go figger, must the the new one aint worth a damn....dunno....

:crazy: :crazy: :surprised :cheers:

 

[Rip]

Ummm.......yes, forgot about that inline fuse. Probably be the first thing to check. I think it's on the heavy gauge orange wire from the main junction block on my 74.

 

[VetteVolts]

On my '72, the odds are for that pesky 30 amp fuse in that stupid white fuse holder, located just aft of the horn relay/power dist tie point on the drivers' fender liner, it's the high speed fuse going directly to the relay...the holder gets corrosion in there, heats the fuse ends, melts the solder in the fuse, fuse looks good, but it's not....fought this on many a GM car...MY cure for my '72 here was to skin the wire ends, and put under a 40 amp circuit breaker type fuse with screw terminals...you could wire in a 30 amp mini fuse, and be much better off with the attendant rubber holder, either one is fine....

but replaceing with another white factory type fuse holder has proven futile over time, for me...

go figger, must the the new one aint worth a damn....dunno....

:crazy: :crazy: :surprised :cheers:

:agree:
I agree if all he is missing is HIGH but if he is missing med. also he has another problem.

 

[Luster]

I had the exact same problem 3 weeks ago. Hi blower not working, all other speeds OK.

With a little help from TimAT, I replaced the High blower relay... As it turned out that relay was bad. Went and got a replacement and all systems were go.

High blower relay is $11 at O'Reilly.

 

[chevyguy1969]

thanks for all the help as soon as i get healed up from my recent injuries i will follow your sugestion to see if i can get this pesky problem fixed thanks again for you help.:cheers: artyon:

 

[chevyguy1969]

ok i went out to the vett today i'm still not sure what i'm looking for the link that was posted didn't work for me any help from the forum in educating me on this would be great. i feel like a stupid a$$ I should be able to locate this part:WTF :thud:

 

[dojo]

I think the relay they are talking about is this one ?!

http://www.ecklers.com/product.asp?pf_id=27456&dept_id=1680

Nick

 

[chevyguy1969]

ah OK i seen that one thanks for the help now i need to put the multi-meter to that thing and see if it is working thanks again. and save the wave:buhbye: :cheers:

 

[Luster]

I think the relay they are talking about is this one ?!

http://www.ecklers.com/product.asp?pf_id=27456&dept_id=1680

Nick

Yes, that's the exact relay that I used.:thumbsup:

 

[moosie982]

Yeah, check that relay but also check the blower motor resistor ,(ecklers # 27260) its mounted up on top of the case in front of the passenger (under the hood tho) it has those curly looking pigtailed hard wires that give you the different speeds, they are known to go bad by burning out which is very visable once you unbolt it from the evap. case. Good luck, Peace,,,Moosie :buhbye: