HVAC

[thomas cory]

Hey Guys,
A little help here, I lost my high speed on my fan unit. Have low / low med , but no med high speed. Thoughts

 

[vkasm1]

I would look at the blower resistor under the hood on the heater box. They burn out.

 

[thomas cory]

Awe ! Thanks !!! Will keep the forum posted.

 

[Reapersgbodys]

Had it happen to my 84 GP, no Hi fan, replaced blower resistor, all is good, cost like $23.95 or around there last summer.

 

[thomas cory]

Perfect, I appreciate your input.

 

[Reapersgbodys]

Thomas,
How goes the fan?? Did the new Resistor fix the fan???? Inquiring minds would like to know, lol

 

[thomas cory]

Thomas,
How goes the fan?? Did the new Resistor fix the fan???? Inquiring minds would like to know, lol

Hello, I’ve narrowd it down to the high speed relay installed by

Thomas,
How goes the fan?? Did the new Resistor fix the fan???? Inquiring minds would like to know, lol

Hello, I actually narrowed it down to the high speed fan relay located on the driver side inner fender well. Relay arrives next week.

 

[captndave737]

The resistors are bypassed in high. I had the same problem, thought the relay was bad but it ended up being the connector that is down the side of the inner fender. Just needed the contacts tightened up.

 

[thomas cory]

The resistors are bypassed in high. I had the same problem, thought the relay was bad but it ended up being the connector that is down the side of the inner fender. Just needed the contacts tightened up.

I will look into it. Steve Wood from “ihadav8” was saying something about the orange wire feeding to it and that checked out fine. So I’ve actually ordered the relay. I will keep this thread posted after I test it out.

 

[captndave737]

I dont have the schematics with me but I believe thats the one. Mine measured 12 volts but the connection was bad and wouldn't carry the current. It drove me nuts for a few days.

 

[thomas cory]

Lol , not so bad for me, still have the low/med speed. Gotta have the AC thogh

 

[captndave737]

OK I found a copy of the schematic on my ipad. The orange wire comes from the switch through C493 which is behind the instrument pannel near the middle of the radio and has 6 cavities. I had forgotten where it was.

 

[thomas cory]

Awe !!! Thanks you !!! Much appreciated

 

[captndave737]

Glad to help. Having the factory shop manuals is advantageous.

 

[thomas cory]

For sure ! Remember this book back in the Poston Buick days ? I have GN’s and TR’s for 20 years.

 

[captndave737]

I have that. Had the shop manuals since I bought the car in 87.

 

[thomas cory]

Awesome to be the original owner ! I’m the second owner . Got mine with 26k and it now has 42. Last few years I’ve done lots of modifications.

 

[captndave737]

Wow! Mine has 220K. Lots of mods over the years but the engine was stock, unopened until I rebuilt it last year. It sat for 3 years with a spun bearing. I almost sold it because I had shoulder surgery and couldn't work on it. glad I didn't.

 

[thomas cory]

Nice ! What type of Intercooler are you running. I remember removing the stock one and going with a mega cooler gave the car a lot more power and boost pressure went up ! I had to turn it down. Jason from RJC racing predicted it !!! Crazy

 

[captndave737]

Running a precision SLIC. Makes it tight in there.