red topless gator

My heater blower on my 74 not working at all. This is a no A/C car. Disconnected the blower and supplied 12 volts and it works, however when testing the supply to the blower it only reads 4.5 volts. Any thoughts?.
Thanks
Larry

sparky77

Could be the resister bank on my 77 its near the the blower ,unplug the resister and check the voltage.Than remove the resister than you can check the resisters and see if they are any good.

red topless gator

Thanks, but I cannot find where the resister is at.

sparky77

Mine is near the blower motor in the air stream of the duct

Peterbuilt

red topless gator

Perterbuilt, thanks for the reply but mine is a 74 non A/C

robert.sperry

I believe that the power supply to the heater blower has an in line fuse. On my son's 74' (his has AC) the in line fuse was under the drivers side fender as accessed from the engine compartment. I suspect the non AC cars are set up the same way. The fuse was in a fuse holder that comes apart with slight twist to reveal a typical fuse of the same type as found on the main fuse panel.

Peterbuilt

https://www.zip-corvette.com/69l-79-...-resistor.html

Yours is in the same place but a different shape.

red topless gator

Still cant physically find the resister

Strokemyaxe

It is bolted to the top of the blower box. Three screws. Marked in the previously post picture with a "Z".

red topless gator

Sorry, is not there

Strokemyaxe

Well it looks to be mounted on the inside of the cab on a 1975 w/o A/C. So maybe yours is too...

Peterbuilt

https://www.zip-corvette.com/69l-79-...-resistor.html
Wow! found at last.
Who new GM would hide it there!

red topless gator

Thank you guys, thought I was going nuts there for awhile.
Larry

Strokemyaxe

You are very welcome. Sorry for the misleadings before. Thank Willcox too! They have saved so many people due to their impeccable and thorough online schematics. Good Guy Willcox...

-Stroke

red topless gator

absolutely!!! now got to remove the center console Grrrrrrrrrrrrrrrrrr.