1970 Corvette Fan Switch

[Mark H.]

I am new to this forum and I have looked at many valuable posts and information regarding correcting my vacuum wiper door operation.

My 1970 coupe 350/350 Hp has factory 4 season A/C. The blower switch, which is new does not work on the highest speed. This car has 35,000 original miles and I an wonder if there is an easy way to trouble shoot my issue. I replace the blower speed swithch, but that did not correct the problem.

Can anyone offer me advice where to look next?

Thanks,

Mark

[Louis F.]

Re: 1970 Corvette Fan Switch

Mark, it's been a long time but I had a 1971 with A/C that had the same problem.I traced it to the drivers side fender near the alternator.There was a red wire with a fused link.A mechanic told me to check that fuse. Sure enough it was blown, changed the fuse and the high speed blower worked. Hope this helps.

[Mark H.]

Re: 1970 Corvette Fan Switch

Thank you Louis, I will do as you suggested. Thanks for a prompt response.

Mark

[Edward J.]

Re: 1970 Corvette Fan Switch

Louis, if the fuse is a dead end, try the blower relay and it electrical connectors they tend to heat up over the years and spread open from the heat. relay is on side of a/c box pass side.