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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: Harmon on July 12, 2010, 04:00:36 pm

Title: It it aint one thing its another
Post by: Harmon on July 12, 2010, 04:00:36 pm

Fixed Fuel Guage...happy

Put truck back together (new dash...replaced dash lights)

Hooked up AC with R-134-A

Blows cold, but seems to only blow in 3 positions... I thought there were 4 positions for blower with HI being the 4th one. 

I replaced Hi blower relay and checked ground to cowl above blower moter----still only 3 posistions of blowing.

I checked 20 amp fuse in fuse block under dash and it is fine.

Im in Texas...I need that Hi side...any idea of what to do next?

Title: Re: It it aint one thing its another
Post by: TexasRed on July 12, 2010, 04:49:12 pm

switch is still good?

Title: Re: It it aint one thing its another
Post by: Harmon on July 12, 2010, 04:49:37 pm

switch meaning the one in the dash?

Title: Re: It it aint one thing its another
Post by: TexasRed on July 12, 2010, 06:02:01 pm

yep.

Title: Re: It it aint one thing its another
Post by: Harmon on July 12, 2010, 06:21:03 pm

I think thats the problem....thanks.

I have to push up really hard to the HI posistion in order for the hi side to kick on.

Thanks!

Title: Re: It it aint one thing its another
Post by: Harmon on July 12, 2010, 06:30:04 pm

Is it possible to just by the switch and replace it for the blower levels?

Title: Re: It it aint one thing its another
Post by: TexasRed on July 12, 2010, 06:36:01 pm

Maybe. . . .http://www.autozone.com/autozone/parts/Duralast-Blower-Motor-Resistor/1977-Chevrolet-K10-1-2-ton-P-U-4WD/_/N-incirZ91tag?counter=1&itemIdentifier=239268_0_3319_5281

Title: Re: It it aint one thing its another
Post by: DnStClr on July 12, 2010, 07:41:41 pm

Maybe the switch is binding up. There are a number of wires attached to it so take note of their location. You have to remove the instrument bezel to work on it or replace it.