Hi all, my name is Steve. I am new to the forum. I have an '84 Buick Regal Limited as a daily driver with the V6. Today my blower motor fan shut down when I went to turn on the A/C. Again the GROUND wire terminal end on the PCB block (printed circuit assembly board that goes inside the blower housing for the automatic climate control) burnt. It happened once before years ago, but this time it was real bad. So I had to splice in a new spade connector.
Just so everyone knows, these automatic climate control types have a UNIQUE circuit board ** assembly that has a few transistors caps, resistors ground plate etc. They are not like normal ones. They don't even sell these anywhere that I could find. This board senses the temperature of the heater core so the heat starts blowing in AUTO mode once the heater core gets up to temperature. Thank God it seems the board assembly is still good.
Now when I repaired the burnt end, I was smart enough this time to put a in-line fuse to this ground terminal. I have a 10 amp fuse in it. So I went to use the A/C and it started to blow and then shut down. I believe the fuse has blown.
I have two questions?
Is the 10 amp fuse proper for a blower motor or is it too low of amps?
My next question, is that I'm afraid to put a higher one in, because I don't want to burn the wire again. Is it possible that the blower motor has a short in it? And is why the wire burnt in the first place from drawing too much current? I think this is the original motor from '84 because I bought the car in '97 with only 70,000 miles on it and had it ever since. Can someone please help so I know what fuse to use and IF I should replace the blower motor? Thanks
PS ** the Printed circuit board where the burnt ground terminal is - is called the
HEATER SPEED CONTROL RESISTOR which is different than a normal type for manual controls. Mine has more terminal and components on it.
Just so everyone knows, these automatic climate control types have a UNIQUE circuit board ** assembly that has a few transistors caps, resistors ground plate etc. They are not like normal ones. They don't even sell these anywhere that I could find. This board senses the temperature of the heater core so the heat starts blowing in AUTO mode once the heater core gets up to temperature. Thank God it seems the board assembly is still good.
Now when I repaired the burnt end, I was smart enough this time to put a in-line fuse to this ground terminal. I have a 10 amp fuse in it. So I went to use the A/C and it started to blow and then shut down. I believe the fuse has blown.
I have two questions?
Is the 10 amp fuse proper for a blower motor or is it too low of amps?
My next question, is that I'm afraid to put a higher one in, because I don't want to burn the wire again. Is it possible that the blower motor has a short in it? And is why the wire burnt in the first place from drawing too much current? I think this is the original motor from '84 because I bought the car in '97 with only 70,000 miles on it and had it ever since. Can someone please help so I know what fuse to use and IF I should replace the blower motor? Thanks
PS ** the Printed circuit board where the burnt ground terminal is - is called the
HEATER SPEED CONTROL RESISTOR which is different than a normal type for manual controls. Mine has more terminal and components on it.
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