[FC] Fuse

[James Davis]

The 61 shop manual calls for a AGC - 20 amp fuse in the heater blower 
circuit.  Max current draw is when starting the fan motor so unless 
it is dragging or needs new grease, a 20 amp fuse should be 
sufficient.  A stock fan motor draws about 16 amps starting and 8/9 
amps running, so I suspect a 15 amp wouldn't last to long in the 
heater fan application.  The radio draws only about 2.5 amps and a 4 
amp fuse is recommended.  So if you are running the radio and heater 
fan of the same circuit a 25 amps fuse might be in order.  For 
inductive electrical circuits a "slow blow" fuse is 
recommended.  While GM did not specify such a fuse, I would surely 
try a "slow-blow" it the regular fuses continue to blow.
Jim Davis



At 06:13 PM 8/22/2007, Ben and Lynn Stiles wrote:
>Hello-
>
>I have a problem with the fuse block that has the radio feed on the 
>front and the heater blower feed on the back (1962 Greenbrier).
>
>I ran a 20 AMP fuse in it, that blew. I then ran a 15 AMP (all I 
>had) and it also blew. This happened when I was turning the fan 
>blower off, but the fuse crinkled a bit in the middle when I turned it on.
>
>Do I need a larger capacity fuse, or do I have a short? With just 
>the radio on, the fuse is fine.
>
>Thanks!
>
>Ben