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1971 Oldsmobile 98 passenger compartment fan issue

Tiny
PATRICKOGLESBY
  • MEMBER
  • 1971 OLDSMOBILE 98
  • V8
  • RWD
  • AUTOMATIC
  • 85,000 MILES
I have a 1971 olds 98 with a 455 in it. My passenger compartment fan works fine with vent, heat, defog, and deice modes. As soon as I turn the ac on the fan does not work at all. The ac is fully charged and engages when it is turned on. Someone said they thought there was a relay for this issue but not for sure. I need to know if this is the case and where to look for it. If there is a part number would be great to know as well. Thank You.
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Tuesday, June 30th, 2015 AT 5:20 PM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
See pics for diagnosis. The blower relay will look llike one being pointed to in pic it is normally by the resistor on evaporator box. These also had a fuse that was inline I think it's on the intake not sure with that as it's been so long for me to see one.
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Wednesday, July 1st, 2015 AT 6:57 AM
Tiny
THIS IS MIKE
  • MECHANIC
  • 686 POSTS
Patrickoglesby
June 30, 2015.

Thank you for your help. Every thing works now. It ended up being the in-line fuse.
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Wednesday, July 1st, 2015 AT 1:24 PM

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