In line fuse for high speed blower for AC on 70 big block

[Willie C.]

Does anyone out there know where the in line fuse for the high speed blower for AC on a 70 454 coupe is?

Thanks,

Willie

[Thad L.]

Re: In line fuse for high speed blower for AC on 70 big block

It's at the horn relay. Driver's side engine compartment by the brake master cyl under hood gutter.

[Terry M.]

Re: In line fuse for high speed blower for AC on 70 big block

Find a thick red wire attached to your horn relay and follow that wire toward the rear of the car. I think the in-line fuse you are looking for is just inboard of the brake master cylinder, but I could be wrong. If you follow the red wire you will find it.

[Jim T.]

Re: In line fuse for high speed blower for AC on 70 big block

Willie the in-line fuse plastic twist open fuse holder is the only wire coming from the horn relay that has this plastic twist open fuse holder. It takes a 30 type fuse and only supplies electrical for the fan's high speed.

[Willie C.]

Re: In line fuse for high speed blower for AC on 70 big block

Does anyone out there know where the in line fuse for the high speed blower for AC on a 70 454 coupe is?

Thanks,

Willie

Thanks for the info everyone. I found it but the fuse looks ok so now is it likely the switch? Thanks,Willie

[Terry M.]

Re: In line fuse for high speed blower for AC on 70 big block

Thanks for the info everyone. I found it but the fuse looks ok so now is it likely the switch? Thanks,Willie

To quote your namesake: "It depends on the meaning of 'it'"

Sorry I couldn't resist. But it would help if you told us what the problem is. We could guess, but knowing is more fun.

I looked in the 1970 AIM for C60 and Thad had the right location. Gives new meaning to the old expression "Ask the man who owns one."

I am just full of useless quotes this morning. Time for lunch.

[Willie C.]

Re: In line fuse for high speed blower for AC on 70 big block

To quote your namesake: "It depends on the meaning of 'it'"

Sorry I couldn't resist. But it would help if you told us what the problem is. We could guess, but knowing is more fun.

I looked in the 1970 AIM for C60 and Thad had the right location. Gives new meaning to the old expression "Ask the man who owns one."

I am just full of useless quotes this morning. Time for lunch.

Hi Terry,
Fan switch only works on three speeds, the high speed is not working. I thought it may have been the inline fuse since it controls the high speed but not so.

Thanks,
Willie

[John H.]

Re: In line fuse for high speed blower for AC on 70 big block

Thanks for the info everyone. I found it but the fuse looks ok so now is it likely the switch? Thanks,Willie

Willie -

Assuming your "looks OK" means you checked the fuse electrically and it's conducting current, that wire feeds the high blower relay on the evaporator case; if the relay isn't engaging when you select high blower, time to check the relay and the switch.

[Leif A.]

Re: In line fuse for high speed blower for AC on 70 big block

What John said. I've had many fuses over the years that "looked OK" but were bad. Pop a new 30 amp in there first and see what happens. The other stuff is much harder to do.

[Rich C.]

Re: In line fuse for high speed blower for AC on 70 big block

Willie,

Could be the A/C relay!


1973 LS-4 454 coupe owned 24 years
1996 LT-4 Collector Edition coupe owned 13 months
Sierra Nevada Torpedo IPA-currently on tap!

[Willie C.]

Re: In line fuse for high speed blower for AC on 70 big block

Thanks for the suggestions everyone, I'm now looking at the relay and the switch.

Willie